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Microsoft Windows Server 2019 Security Technical Implementation Guide

  • Version/Release: V2R8
  • Published: 2023-09-11
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This Security Technical Implementation Guide is published as a tool to improve the security of Department of Defense (DOD) information systems. The requirements are derived from the National Institute of Standards and Technology (NIST) 800-53 and related documents. Comments or proposed revisions to this document should be sent via email to the following address: disa.stig_spt@mail.mil.
b
Windows Server 2019 must automatically remove or disable temporary user accounts after 72 hours.
AC-2 - Medium - CCI-000016 - V-205624 - SV-205624r857301_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-000016
Version
WN19-00-000300
Vuln IDs
  • V-205624
  • V-92975
Rule IDs
  • SV-205624r857301_rule
  • SV-103063
If temporary user accounts remain active when no longer needed or for an excessive period, these accounts may be used to gain unauthorized access. To mitigate this risk, automated termination of all temporary accounts must be set upon account creation. Temporary accounts are established as part of normal account activation procedures when there is a need for short-term accounts without the demand for immediacy in account activation. If temporary accounts are used, the operating system must be configured to automatically terminate these types of accounts after a DoD-defined time period of 72 hours. To address access requirements, many operating systems may be integrated with enterprise-level authentication/access mechanisms that meet or exceed access control policy requirements.
Checks: C-5889r857300_chk

Review temporary user accounts for expiration dates. Determine if temporary user accounts are used and identify any that exist. If none exist, this is NA. Domain Controllers: Open "PowerShell". Enter "Search-ADAccount -AccountExpiring | FT Name, AccountExpirationDate". If "AccountExpirationDate" has not been defined within 72 hours for any temporary user account, this is a finding. Member servers and standalone or nondomain-joined systems: Open "Command Prompt". Run "Net user [username]", where [username] is the name of the temporary user account. If "Account expires" has not been defined within 72 hours for any temporary user account, this is a finding.

Fix: F-5889r354791_fix

Configure temporary user accounts to automatically expire within 72 hours. Domain accounts can be configured with an account expiration date, under "Account" properties. Local accounts can be configured to expire with the command "Net user [username] /expires:[mm/dd/yyyy]", where username is the name of the temporary user account. Delete any temporary user accounts that are no longer necessary.

b
Windows Server 2019 must be configured to audit Account Management - Security Group Management successes.
AC-2 - Medium - CCI-000018 - V-205625 - SV-205625r852412_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-000018
Version
WN19-AU-000100
Vuln IDs
  • V-205625
  • V-92979
Rule IDs
  • SV-205625r852412_rule
  • SV-103067
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Security Group Management records events such as creating, deleting, or changing security groups, including changes in group members. Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000476-GPOS-00221
Checks: C-5890r354793_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Account Management >> Security Group Management - Success

Fix: F-5890r354794_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Account Management >> "Audit Security Group Management" with "Success" selected.

b
Windows Server 2019 must be configured to audit Account Management - User Account Management successes.
AC-2 - Medium - CCI-000018 - V-205626 - SV-205626r852413_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-000018
Version
WN19-AU-000110
Vuln IDs
  • V-205626
  • V-92981
Rule IDs
  • SV-205626r852413_rule
  • SV-103069
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. User Account Management records events such as creating, changing, deleting, renaming, disabling, or enabling user accounts. Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000476-GPOS-00221
Checks: C-5891r354796_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Account Management >> User Account Management - Success

Fix: F-5891r354797_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Account Management >> "Audit User Account Management" with "Success" selected.

b
Windows Server 2019 must be configured to audit Account Management - User Account Management failures.
AC-2 - Medium - CCI-000018 - V-205627 - SV-205627r852414_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-000018
Version
WN19-AU-000120
Vuln IDs
  • V-205627
  • V-92983
Rule IDs
  • SV-205627r852414_rule
  • SV-103071
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. User Account Management records events such as creating, changing, deleting, renaming, disabling, or enabling user accounts. Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000476-GPOS-00221
Checks: C-5892r354799_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Account Management >> User Account Management - Failure

Fix: F-5892r354800_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Account Management >> "Audit User Account Management" with "Failure" selected.

b
Windows Server 2019 must be configured to audit Account Management - Computer Account Management successes.
AC-2 - Medium - CCI-000018 - V-205628 - SV-205628r852415_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-000018
Version
WN19-DC-000230
Vuln IDs
  • V-205628
  • V-92985
Rule IDs
  • SV-205628r852415_rule
  • SV-103073
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Computer Account Management records events such as creating, changing, deleting, renaming, disabling, or enabling computer accounts. Satisfies: SRG-OS-000004-GPOS-00004, SRG-OS-000239-GPOS-00089, SRG-OS-000240-GPOS-00090, SRG-OS-000241-GPOS-00091, SRG-OS-000303-GPOS-00120, SRG-OS-000476-GPOS-00221
Checks: C-5893r354802_chk

This applies to domain controllers. It is NA for other systems. Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Account Management >> Computer Account Management - Success

Fix: F-5893r354803_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Account Management >> "Audit Computer Account Management" with "Success" selected.

b
Windows Server 2019 must have the number of allowed bad logon attempts configured to three or less.
AC-7 - Medium - CCI-000044 - V-205629 - SV-205629r569188_rule
RMF Control
AC-7
Severity
Medium
CCI
CCI-000044
Version
WN19-AC-000020
Vuln IDs
  • V-205629
  • V-93141
Rule IDs
  • SV-205629r569188_rule
  • SV-103229
The account lockout feature, when enabled, prevents brute-force password attacks on the system. The higher this value is, the less effective the account lockout feature will be in protecting the local system. The number of bad logon attempts must be reasonably small to minimize the possibility of a successful password attack while allowing for honest errors made during normal user logon.
Checks: C-5894r354805_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Account Lockout Policy. If the "Account lockout threshold" is "0" or more than "3" attempts, this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "LockoutBadCount" equals "0" or is greater than "3" in the file, this is a finding.

Fix: F-5894r354806_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Account Lockout Policy >> "Account lockout threshold" to "3" or fewer invalid logon attempts (excluding "0", which is unacceptable).

b
Windows Server 2019 must have the period of time before the bad logon counter is reset configured to 15 minutes or greater.
AC-7 - Medium - CCI-000044 - V-205630 - SV-205630r852416_rule
RMF Control
AC-7
Severity
Medium
CCI
CCI-000044
Version
WN19-AC-000030
Vuln IDs
  • V-205630
  • V-93143
Rule IDs
  • SV-205630r852416_rule
  • SV-103231
The account lockout feature, when enabled, prevents brute-force password attacks on the system. This parameter specifies the period of time that must pass after failed logon attempts before the counter is reset to "0". The smaller this value is, the less effective the account lockout feature will be in protecting the local system. Satisfies: SRG-OS-000021-GPOS-00005, SRG-OS-000329-GPOS-00128
Checks: C-5895r354808_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Account Lockout Policy. If the "Reset account lockout counter after" value is less than "15" minutes, this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "ResetLockoutCount" is less than "15" in the file, this is a finding.

Fix: F-5895r354809_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Account Lockout Policy >> "Reset account lockout counter after" to at least "15" minutes.

b
Windows Server 2019 required legal notice must be configured to display before console logon.
AC-8 - Medium - CCI-000048 - V-205631 - SV-205631r569188_rule
RMF Control
AC-8
Severity
Medium
CCI
CCI-000048
Version
WN19-SO-000130
Vuln IDs
  • V-205631
  • V-93147
Rule IDs
  • SV-205631r569188_rule
  • SV-103235
Failure to display the logon banner prior to a logon attempt will negate legal proceedings resulting from unauthorized access to system resources. Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000024-GPOS-00007, SRG-OS-000228-GPOS-00088
Checks: C-5896r354811_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: LegalNoticeText Value Type: REG_SZ Value: See message text below You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details.

Fix: F-5896r354812_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Interactive Logon: Message text for users attempting to log on" to the following: You are accessing a U.S. Government (USG) Information System (IS) that is provided for USG-authorized use only. By using this IS (which includes any device attached to this IS), you consent to the following conditions: -The USG routinely intercepts and monitors communications on this IS for purposes including, but not limited to, penetration testing, COMSEC monitoring, network operations and defense, personnel misconduct (PM), law enforcement (LE), and counterintelligence (CI) investigations. -At any time, the USG may inspect and seize data stored on this IS. -Communications using, or data stored on, this IS are not private, are subject to routine monitoring, interception, and search, and may be disclosed or used for any USG-authorized purpose. -This IS includes security measures (e.g., authentication and access controls) to protect USG interests--not for your personal benefit or privacy. -Notwithstanding the above, using this IS does not constitute consent to PM, LE or CI investigative searching or monitoring of the content of privileged communications, or work product, related to personal representation or services by attorneys, psychotherapists, or clergy, and their assistants. Such communications and work product are private and confidential. See User Agreement for details.

a
Windows Server 2019 title for legal banner dialog box must be configured with the appropriate text.
AC-8 - Low - CCI-000048 - V-205632 - SV-205632r890533_rule
RMF Control
AC-8
Severity
Low
CCI
CCI-000048
Version
WN19-SO-000140
Vuln IDs
  • V-205632
  • V-93149
Rule IDs
  • SV-205632r890533_rule
  • SV-103237
Failure to display the logon banner prior to a logon attempt will negate legal proceedings resulting from unauthorized access to system resources. Satisfies: SRG-OS-000023-GPOS-00006, SRG-OS-000228-GPOS-00088
Checks: C-5897r890531_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: LegalNoticeCaption Value Type: REG_SZ Value: Refer to message title options below "DoD Notice and Consent Banner", "US Department of Defense Warning Statement", or an organization-defined equivalent. If an organization-defined title is used, it can in no case contravene or modify the language of the banner text required in WN19-SO-000130. Automated tools may only search for the titles defined above. If an organization-defined title is used, a manual review will be required.

Fix: F-5897r890532_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Interactive Logon: Message title for users attempting to log on" to "DoD Notice and Consent Banner", "US Department of Defense Warning Statement", or an organization-defined equivalent. If an organization-defined title is used, it can in no case contravene or modify the language of the message text required in WN19-SO-000130.

b
Windows Server 2019 machine inactivity limit must be set to 15 minutes or less, locking the system with the screen saver.
AC-11 - Medium - CCI-000056 - V-205633 - SV-205633r569188_rule
RMF Control
AC-11
Severity
Medium
CCI
CCI-000056
Version
WN19-SO-000120
Vuln IDs
  • V-205633
  • V-92961
Rule IDs
  • SV-205633r569188_rule
  • SV-103049
Unattended systems are susceptible to unauthorized use and should be locked when unattended. The screen saver should be set at a maximum of 15 minutes and be password protected. This protects critical and sensitive data from exposure to unauthorized personnel with physical access to the computer. Satisfies: SRG-OS-000028-GPOS-00009, SRG-OS-000029-GPOS-00010, SRG-OS-000031-GPOS-00012
Checks: C-5898r354817_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: InactivityTimeoutSecs Value Type: REG_DWORD Value: 0x00000384 (900) (or less, excluding "0" which is effectively disabled)

Fix: F-5898r354818_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Interactive logon: Machine inactivity limit" to "900" seconds or less, excluding "0" which is effectively disabled.

b
Windows Server 2019 must be configured to audit logon successes.
AC-17 - Medium - CCI-000067 - V-205634 - SV-205634r569188_rule
RMF Control
AC-17
Severity
Medium
CCI
CCI-000067
Version
WN19-AU-000190
Vuln IDs
  • V-205634
  • V-92967
Rule IDs
  • SV-205634r569188_rule
  • SV-103055
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Logon records user logons. If this is an interactive logon, it is recorded on the local system. If it is to a network share, it is recorded on the system accessed. Satisfies: SRG-OS-000032-GPOS-00013, SRG-OS-000470-GPOS-00214, SRG-OS-000472-GPOS-00217, SRG-OS-000473-GPOS-00218, SRG-OS-000475-GPOS-00220
Checks: C-5899r354820_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Logon/Logoff >> Logon - Success

Fix: F-5899r354821_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Logon/Logoff >> "Audit Logon" with "Success" selected.

b
Windows Server 2019 must be configured to audit logon failures.
AC-17 - Medium - CCI-000067 - V-205635 - SV-205635r569188_rule
RMF Control
AC-17
Severity
Medium
CCI
CCI-000067
Version
WN19-AU-000200
Vuln IDs
  • V-205635
  • V-92969
Rule IDs
  • SV-205635r569188_rule
  • SV-103057
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Logon records user logons. If this is an interactive logon, it is recorded on the local system. If it is to a network share, it is recorded on the system accessed. Satisfies: SRG-OS-000032-GPOS-00013, SRG-OS-000470-GPOS-00214, SRG-OS-000472-GPOS-00217, SRG-OS-000473-GPOS-00218, SRG-OS-000475-GPOS-00220
Checks: C-5900r354823_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Logon/Logoff >> Logon - Failure

Fix: F-5900r354824_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Logon/Logoff >> "Audit Logon" with "Failure" selected.

b
Windows Server 2019 Remote Desktop Services must require secure Remote Procedure Call (RPC) communications.
AC-17 - Medium - CCI-000068 - V-205636 - SV-205636r877398_rule
RMF Control
AC-17
Severity
Medium
CCI
CCI-000068
Version
WN19-CC-000370
Vuln IDs
  • V-205636
  • V-92971
Rule IDs
  • SV-205636r877398_rule
  • SV-103059
Allowing unsecure RPC communication exposes the system to man-in-the-middle attacks and data disclosure attacks. A man-in-the-middle attack occurs when an intruder captures packets between a client and server and modifies them before allowing the packets to be exchanged. Usually the attacker will modify the information in the packets in an attempt to cause either the client or server to reveal sensitive information. Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000250-GPOS-00093
Checks: C-5901r354826_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\ Value Name: fEncryptRPCTraffic Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5901r354827_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Remote Desktop Services >> Remote Desktop Session Host >> Security >> "Require secure RPC communication" to "Enabled".

b
Windows Server 2019 Remote Desktop Services must be configured with the client connection encryption set to High Level.
AC-17 - Medium - CCI-000068 - V-205637 - SV-205637r877398_rule
RMF Control
AC-17
Severity
Medium
CCI
CCI-000068
Version
WN19-CC-000380
Vuln IDs
  • V-205637
  • V-92973
Rule IDs
  • SV-205637r877398_rule
  • SV-103061
Remote connections must be encrypted to prevent interception of data or sensitive information. Selecting "High Level" will ensure encryption of Remote Desktop Services sessions in both directions. Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000250-GPOS-00093
Checks: C-5902r354829_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\ Value Name: MinEncryptionLevel Type: REG_DWORD Value: 0x00000003 (3)

Fix: F-5902r354830_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Remote Desktop Services >> Remote Desktop Session Host >> Security >> "Set client connection encryption level" to "Enabled" with "High Level" selected.

b
Windows Server 2019 command line data must be included in process creation events.
AU-3 - Medium - CCI-000135 - V-205638 - SV-205638r569188_rule
RMF Control
AU-3
Severity
Medium
CCI
CCI-000135
Version
WN19-CC-000090
Vuln IDs
  • V-205638
  • V-93173
Rule IDs
  • SV-205638r569188_rule
  • SV-103261
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Enabling "Include command line data for process creation events" will record the command line information with the process creation events in the log. This can provide additional detail when malware has run on a system.
Checks: C-5903r354832_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\Audit\ Value Name: ProcessCreationIncludeCmdLine_Enabled Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5903r354833_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Audit Process Creation >> "Include command line in process creation events" to "Enabled".

b
Windows Server 2019 PowerShell script block logging must be enabled.
AU-3 - Medium - CCI-000135 - V-205639 - SV-205639r569188_rule
RMF Control
AU-3
Severity
Medium
CCI
CCI-000135
Version
WN19-CC-000460
Vuln IDs
  • V-205639
  • V-93175
Rule IDs
  • SV-205639r569188_rule
  • SV-103263
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Enabling PowerShell script block logging will record detailed information from the processing of PowerShell commands and scripts. This can provide additional detail when malware has run on a system.
Checks: C-5904r472878_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\PowerShell\ScriptBlockLogging\ Value Name: EnableScriptBlockLogging Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5904r354836_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows PowerShell >> "Turn on PowerShell Script Block Logging" to "Enabled".

b
Windows Server 2019 permissions for the Application event log must prevent access by non-privileged accounts.
AU-9 - Medium - CCI-000162 - V-205640 - SV-205640r569188_rule
RMF Control
AU-9
Severity
Medium
CCI
CCI-000162
Version
WN19-AU-000030
Vuln IDs
  • V-205640
  • V-93189
Rule IDs
  • SV-205640r569188_rule
  • SV-103277
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. The Application event log may be susceptible to tampering if proper permissions are not applied. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029
Checks: C-5905r354838_chk

Navigate to the Application event log file. The default location is the "%SystemRoot%\System32\winevt\Logs" folder. However, the logs may have been moved to another folder. If the permissions for the "Application.evtx" file are not as restrictive as the default permissions listed below, this is a finding: Eventlog - Full Control SYSTEM - Full Control Administrators - Full Control

Fix: F-5905r354839_fix

Configure the permissions on the Application event log file (Application.evtx) to prevent access by non-privileged accounts. The default permissions listed below satisfy this requirement: Eventlog - Full Control SYSTEM - Full Control Administrators - Full Control The default location is the "%SystemRoot%\System32\winevt\Logs" folder. If the location of the logs has been changed, when adding Eventlog to the permissions, it must be entered as "NT Service\Eventlog".

b
Windows Server 2019 permissions for the Security event log must prevent access by non-privileged accounts.
AU-9 - Medium - CCI-000162 - V-205641 - SV-205641r569188_rule
RMF Control
AU-9
Severity
Medium
CCI
CCI-000162
Version
WN19-AU-000040
Vuln IDs
  • V-205641
  • V-93191
Rule IDs
  • SV-205641r569188_rule
  • SV-103279
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. The Security event log may disclose sensitive information or be susceptible to tampering if proper permissions are not applied. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029
Checks: C-5906r354841_chk

Navigate to the Security event log file. The default location is the "%SystemRoot%\System32\winevt\Logs" folder. However, the logs may have been moved to another folder. If the permissions for the "Security.evtx" file are not as restrictive as the default permissions listed below, this is a finding: Eventlog - Full Control SYSTEM - Full Control Administrators - Full Control

Fix: F-5906r354842_fix

Configure the permissions on the Security event log file (Security.evtx) to prevent access by non-privileged accounts. The default permissions listed below satisfy this requirement: Eventlog - Full Control SYSTEM - Full Control Administrators - Full Control The default location is the "%SystemRoot%\System32\winevt\Logs" folder. If the location of the logs has been changed, when adding Eventlog to the permissions, it must be entered as "NT Service\Eventlog".

b
Windows Server 2019 permissions for the System event log must prevent access by non-privileged accounts.
AU-9 - Medium - CCI-000162 - V-205642 - SV-205642r569188_rule
RMF Control
AU-9
Severity
Medium
CCI
CCI-000162
Version
WN19-AU-000050
Vuln IDs
  • V-205642
  • V-93193
Rule IDs
  • SV-205642r569188_rule
  • SV-103281
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. The System event log may be susceptible to tampering if proper permissions are not applied. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029
Checks: C-5907r354844_chk

Navigate to the System event log file. The default location is the "%SystemRoot%\System32\winevt\Logs" folder. However, the logs may have been moved to another folder. If the permissions for the "System.evtx" file are not as restrictive as the default permissions listed below, this is a finding: Eventlog - Full Control SYSTEM - Full Control Administrators - Full Control

Fix: F-5907r354845_fix

Configure the permissions on the System event log file (System.evtx) to prevent access by non-privileged accounts. The default permissions listed below satisfy this requirement: Eventlog - Full Control SYSTEM - Full Control Administrators - Full Control The default location is the "%SystemRoot%\System32\winevt\Logs" folder. If the location of the logs has been changed, when adding Eventlog to the permissions, it must be entered as "NT Service\Eventlog".

b
Windows Server 2019 Manage auditing and security log user right must only be assigned to the Administrators group.
AU-9 - Medium - CCI-000162 - V-205643 - SV-205643r852417_rule
RMF Control
AU-9
Severity
Medium
CCI
CCI-000162
Version
WN19-UR-000170
Vuln IDs
  • V-205643
  • V-93197
Rule IDs
  • SV-205643r852417_rule
  • SV-103285
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Manage auditing and security log" user right can manage the security log and change auditing configurations. This could be used to clear evidence of tampering. Satisfies: SRG-OS-000057-GPOS-00027, SRG-OS-000058-GPOS-00028, SRG-OS-000059-GPOS-00029, SRG-OS-000063-GPOS-00032, SRG-OS-000337-GPOS-00129
Checks: C-5908r354847_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Manage auditing and security log" user right, this is a finding. - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeSecurityPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators) If the organization has an Auditors group, the assignment of this group to the user right would not be a finding. If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-5908r354848_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Manage auditing and security log" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 must force audit policy subcategory settings to override audit policy category settings.
AU-12 - Medium - CCI-000169 - V-205644 - SV-205644r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000169
Version
WN19-SO-000050
Vuln IDs
  • V-205644
  • V-93151
Rule IDs
  • SV-205644r569188_rule
  • SV-103239
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. This setting allows administrators to enable more precise auditing capabilities.
Checks: C-5909r354850_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\ Value Name: SCENoApplyLegacyAuditPolicy Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5909r354851_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" to "Enabled".

b
Windows Server 2019 domain controllers must have a PKI server certificate.
IA-5 - Medium - CCI-000185 - V-205645 - SV-205645r569188_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000185
Version
WN19-DC-000280
Vuln IDs
  • V-205645
  • V-93481
Rule IDs
  • SV-205645r569188_rule
  • SV-103567
Domain controllers are part of the chain of trust for PKI authentications. Without the appropriate certificate, the authenticity of the domain controller cannot be verified. Domain controllers must have a server certificate to establish authenticity as part of PKI authentications in the domain.
Checks: C-5910r354853_chk

This applies to domain controllers. It is NA for other systems. Run "MMC". Select "Add/Remove Snap-in" from the "File" menu. Select "Certificates" in the left pane and click the "Add >" button. Select "Computer Account" and click "Next". Select the appropriate option for "Select the computer you want this snap-in to manage" and click "Finish". Click "OK". Select and expand the Certificates (Local Computer) entry in the left pane. Select and expand the Personal entry in the left pane. Select the Certificates entry in the left pane. If no certificate for the domain controller exists in the right pane, this is a finding.

Fix: F-5910r354854_fix

Obtain a server certificate for the domain controller.

c
Windows Server 2019 domain Controller PKI certificates must be issued by the DoD PKI or an approved External Certificate Authority (ECA).
IA-5 - High - CCI-000185 - V-205646 - SV-205646r569188_rule
RMF Control
IA-5
Severity
High
CCI
CCI-000185
Version
WN19-DC-000290
Vuln IDs
  • V-205646
  • V-93483
Rule IDs
  • SV-205646r569188_rule
  • SV-103569
A PKI implementation depends on the practices established by the Certificate Authority (CA) to ensure the implementation is secure. Without proper practices, the certificates issued by a CA have limited value in authentication functions. The use of multiple CAs from separate PKI implementations results in interoperability issues. If servers and clients do not have a common set of root CA certificates, they are not able to authenticate each other.
Checks: C-5911r354856_chk

This applies to domain controllers. It is NA for other systems. Run "MMC". Select "Add/Remove Snap-in" from the "File" menu. Select "Certificates" in the left pane and click the "Add >" button. Select "Computer Account" and click "Next". Select the appropriate option for "Select the computer you want this snap-in to manage" and click "Finish". Click "OK". Select and expand the Certificates (Local Computer) entry in the left pane. Select and expand the Personal entry in the left pane. Select the Certificates entry in the left pane. In the right pane, examine the "Issued By" field for the certificate to determine the issuing CA. If the "Issued By" field of the PKI certificate being used by the domain controller does not indicate the issuing CA is part of the DoD PKI or an approved ECA, this is a finding. If the certificates in use are issued by a CA authorized by the Component's CIO, this is a CAT II finding. There are multiple sources from which lists of valid DoD CAs and approved ECAs can be obtained: The Global Directory Service (GDS) website provides an online source. The address for this site is https://crl.gds.disa.mil. DoD Public Key Enablement (PKE) Engineering Support maintains the InstallRoot utility to manage DoD supported root certificates on Windows computers, which includes a list of authorized CAs. The utility package can be downloaded from the PKI and PKE Tools page on IASE: http://iase.disa.mil/pki-pke/function_pages/tools.html

Fix: F-5911r354857_fix

Obtain a server certificate for the domain controller issued by the DoD PKI or an approved ECA.

c
Windows Server 2019 PKI certificates associated with user accounts must be issued by a DoD PKI or an approved External Certificate Authority (ECA).
IA-5 - High - CCI-000185 - V-205647 - SV-205647r569188_rule
RMF Control
IA-5
Severity
High
CCI
CCI-000185
Version
WN19-DC-000300
Vuln IDs
  • V-205647
  • V-93485
Rule IDs
  • SV-205647r569188_rule
  • SV-103571
A PKI implementation depends on the practices established by the Certificate Authority (CA) to ensure the implementation is secure. Without proper practices, the certificates issued by a CA have limited value in authentication functions.
Checks: C-5912r354859_chk

This applies to domain controllers. It is NA for other systems. Review user account mappings to PKI certificates. Open "Windows PowerShell". Enter "Get-ADUser -Filter * | FT Name, UserPrincipalName, Enabled". Exclude disabled accounts (e.g., DefaultAccount, Guest) and the krbtgt account. If the User Principal Name (UPN) is not in the format of an individual's identifier for the certificate type and for the appropriate domain suffix, this is a finding. For standard NIPRNet certificates, the individual's identifier is in the format of an Electronic Data Interchange - Personnel Identifier (EDI-PI). Alt Tokens and other certificates may use a different UPN format than the EDI-PI which vary by organization. Verified these with the organization. NIPRNet Example: Name - User Principal Name User1 - 1234567890@mil See PKE documentation for other network domain suffixes. If the mappings are to certificates issued by a CA authorized by the Component's CIO, this is a CAT II finding.

Fix: F-5912r354860_fix

Map user accounts to PKI certificates using the appropriate User Principal Name (UPN) for the network. See PKE documentation for details.

b
Windows Server 2019 must have the DoD Root Certificate Authority (CA) certificates installed in the Trusted Root Store.
IA-5 - Medium - CCI-000185 - V-205648 - SV-205648r921948_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000185
Version
WN19-PK-000010
Vuln IDs
  • V-205648
  • V-93487
Rule IDs
  • SV-205648r921948_rule
  • SV-103573
To ensure secure DoD websites and DoD-signed code are properly validated, the system must trust the DoD Root CAs. The DoD root certificates will ensure that the trust chain is established for server certificates issued from the DoD CAs. Satisfies: SRG-OS-000066-GPOS-00034, SRG-OS-000403-GPOS-00182
Checks: C-5913r921946_chk

Certificates and thumbprints referenced below apply to unclassified systems; refer to PKE documentation for other networks. Open "Windows PowerShell" as an administrator. Execute the following command: Get-ChildItem -Path Cert:Localmachine\root | Where Subject -Like "*DoD*" | FL Subject, Thumbprint, NotAfter If the following certificate "Subject" and "Thumbprint" information is not displayed, this is a finding. Subject: CN=DoD Root CA 3, OU=PKI, OU=DoD, O=U.S. Government, C=US Thumbprint: D73CA91102A2204A36459ED32213B467D7CE97FB NotAfter: 12/30/2029 Subject: CN=DoD Root CA 4, OU=PKI, OU=DoD, O=U.S. Government, C=US Thumbprint: B8269F25DBD937ECAFD4C35A9838571723F2D026 NotAfter: 7/25/2032 Subject: CN=DoD Root CA 5, OU=PKI, OU=DoD, O=U.S. Government, C=US Thumbprint: 4ECB5CC3095670454DA1CBD410FC921F46B8564B NotAfter: 6/14/2041 Subject: CN=DoD Root CA 6, OU=PKI, OU=DoD, O=U.S. Government, C=US Thumbprint: D37ECF61C0B4ED88681EF3630C4E2FC787B37AEF NotAfter: 1/24/2053 11:36:17 AM Alternately, use the Certificates MMC snap-in: Run "MMC". Select "File", "Add/Remove Snap-in". Select "Certificates" and click "Add". Select "Computer account" and click "Next". Select "Local computer: (the computer this console is running on)" and click "Finish". Click "OK". Expand "Certificates" and navigate to "Trusted Root Certification Authorities >> Certificates". Expand "Certificates" and navigate to "Trusted Root Certification Authorities >> Certificates". For each of the DoD Root CA certificates noted below: Right-click on the certificate and select "Open". Select the "Details" tab. Scroll to the bottom and select "Thumbprint". If the DoD Root CA certificates below are not listed or the value for the "Thumbprint" field is not as noted, this is a finding. DoD Root CA 3 Thumbprint: D73CA91102A2204A36459ED32213B467D7CE97FB Valid to: Sunday, December 30, 2029 DoD Root CA 4 Thumbprint: B8269F25DBD937ECAFD4C35A9838571723F2D026 Valid to: Sunday, July 25, 2032 DoD Root CA 5 Thumbprint: 4ECB5CC3095670454DA1CBD410FC921F46B8564B Valid to: Friday, June 14, 2041 DoD Root CA 6 Thumbprint: D37ECF61C0B4ED88681EF3630C4E2FC787B37AEFB Valid to: Friday, January 24, 2053

Fix: F-5913r921947_fix

Install the DoD Root CA certificates: DoD Root CA 3 DoD Root CA 4 DoD Root CA 5 DoD Root CA 6 The InstallRoot tool is available on Cyber Exchange at https://cyber.mil/pki-pke/tools-configuration-files. Certificate bundles published by the PKI can be found at https://crl.gds.disa.mil/.

b
Windows Server 2019 must have the DoD Interoperability Root Certificate Authority (CA) cross-certificates installed in the Untrusted Certificates Store on unclassified systems.
IA-5 - Medium - CCI-000185 - V-205649 - SV-205649r894615_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000185
Version
WN19-PK-000020
Vuln IDs
  • V-205649
  • V-93489
Rule IDs
  • SV-205649r894615_rule
  • SV-103575
To ensure users do not experience denial of service when performing certificate-based authentication to DoD websites due to the system chaining to a root other than DoD Root CAs, the DoD Interoperability Root CA cross-certificates must be installed in the Untrusted Certificate Store. This requirement only applies to unclassified systems. Satisfies: SRG-OS-000066-GPOS-00034, SRG-OS-000403-GPOS-00182
Checks: C-5914r894615_chk

This is applicable to unclassified systems. It is NA for others. Open "PowerShell" as an administrator. Execute the following command: Get-ChildItem -Path Cert:Localmachine\disallowed | Where {$_.Issuer -Like "*DoD Interoperability*" -and $_.Subject -Like "*DoD*"} | FL Subject, Issuer, Thumbprint, NotAfter If the following certificate "Subject", "Issuer", and "Thumbprint" information is not displayed, this is a finding. Subject: CN=DoD Root CA 3, OU=PKI, OU=DoD, O=U.S. Government, C=US Issuer: CN=DoD Interoperability Root CA 2, OU=PKI, OU=DoD, O=U.S. Government, C=US Thumbprint: 49CBE933151872E17C8EAE7F0ABA97FB610F6477 NotAfter: 11/16/2024 9:57:16 AM Alternately, use the Certificates MMC snap-in: Run "MMC". Select "File", "Add/Remove Snap-in". Select "Certificates" and click "Add". Select "Computer account" and click "Next". Select "Local computer: (the computer this console is running on)" and click "Finish". Click "OK". Expand "Certificates" and navigate to Untrusted Certificates >> Certificates. For each certificate with "DoD Root CA..." under "Issued To" and "DoD Interoperability Root CA..." under "Issued By": Right-click on the certificate and select "Open". Select the "Details" tab. Scroll to the bottom and select "Thumbprint". If the certificate below is not listed or the value for the "Thumbprint" field is not as noted, this is a finding. Issued to: DoD Root CA 3 Issued By: DoD Interoperability Root CA 2 Thumbprint: 49CBE933151872E17C8EAE7F0ABA97FB610F6477 Valid to: 11/16/2024 9:57:16 AM

Fix: F-5914r894340_fix

Install the DoD Interoperability Root CA cross-certificates on unclassified systems. Issued To - Issued By - Thumbprint DoD Root CA 3 - DoD Interoperability Root CA 2 - 49CBE933151872E17C8EAE7F0ABA97FB610F6477 Administrators should run the Federal Bridge Certification Authority (FBCA) Cross-Certificate Removal Tool once as an administrator and once as the current user. The FBCA Cross-Certificate Remover Tool and User Guide are available on Cyber Exchange at https://cyber.mil/pki-pke/tools-configuration-files.

b
Windows Server 2019 must have the US DoD CCEB Interoperability Root CA cross-certificates in the Untrusted Certificates Store on unclassified systems.
IA-5 - Medium - CCI-000185 - V-205650 - SV-205650r890530_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000185
Version
WN19-PK-000030
Vuln IDs
  • V-205650
  • V-93491
Rule IDs
  • SV-205650r890530_rule
  • SV-103577
To ensure users do not experience denial of service when performing certificate-based authentication to DoD websites due to the system chaining to a root other than DoD Root CAs, the US DoD CCEB Interoperability Root CA cross-certificates must be installed in the Untrusted Certificate Store. This requirement only applies to unclassified systems. Satisfies: SRG-OS-000066-GPOS-00034, SRG-OS-000403-GPOS-00182
Checks: C-5915r890528_chk

This is applicable to unclassified systems. It is NA for others. Open "PowerShell" as an administrator. Execute the following command: Get-ChildItem -Path Cert:Localmachine\disallowed | Where Issuer -Like "*CCEB Interoperability*" | FL Subject, Issuer, Thumbprint, NotAfter If the following certificate "Subject", "Issuer", and "Thumbprint" information is not displayed, this is a finding. Subject: CN=DoD Root CA 3, OU=PKI, OU=DoD, O=U.S. Government, C=US Issuer: CN=US DoD CCEB Interoperability Root CA 2, OU=PKI, OU=DoD, O=U.S. Government, C=US Thumbprint: 9B74964506C7ED9138070D08D5F8B969866560C8 NotAfter: 7/18/2025 9:56:22 AM Alternately, use the Certificates MMC snap-in: Run "MMC". Select "File", "Add/Remove Snap-in". Select "Certificates" and click "Add". Select "Computer account" and click "Next". Select "Local computer: (the computer this console is running on)" and click "Finish". Click "OK". Expand "Certificates" and navigate to Untrusted Certificates >> Certificates. For each certificate with "US DoD CCEB Interoperability Root CA ..." under "Issued By": Right-click on the certificate and select "Open". Select the "Details" tab. Scroll to the bottom and select "Thumbprint". If the certificate below is not listed or the value for the "Thumbprint" field is not as noted, this is a finding. Subject: CN=DoD Root CA 3, OU=PKI, OU=DoD, O=U.S. Government, C=US Issuer: CN=US DoD CCEB Interoperability Root CA 2, OU=PKI, OU=DoD, O=U.S. Government, C=US Thumbprint: 9B74964506C7ED9138070D08D5F8B969866560C8 NotAfter: 7/18/2025 9:56:22 AM

Fix: F-5915r890529_fix

Install the US DoD CCEB Interoperability Root CA cross-certificate on unclassified systems. Issued To - Issued By - Thumbprint DoD Root CA 3 - US DoD CCEB Interoperability Root CA 2 - 9B74964506C7ED9138070D08D5F8B969866560C8 Administrators should run the Federal Bridge Certification Authority (FBCA) Cross-Certificate Removal Tool once as an administrator and once as the current user. The FBCA Cross-Certificate Remover Tool and User Guide are available on Cyber Exchange at https://cyber.mil/pki-pke/tools-configuration-files. Certificate bundles published by the PKI can be found at https://crl.gds.disa.mil/.

b
Windows Server 2019 users must be required to enter a password to access private keys stored on the computer.
IA-5 - Medium - CCI-000186 - V-205651 - SV-205651r569188_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000186
Version
WN19-SO-000350
Vuln IDs
  • V-205651
  • V-93493
Rule IDs
  • SV-205651r569188_rule
  • SV-103579
If the private key is discovered, an attacker can use the key to authenticate as an authorized user and gain access to the network infrastructure. The cornerstone of the PKI is the private key used to encrypt or digitally sign information. If the private key is stolen, this will lead to the compromise of the authentication and non-repudiation gained through PKI because the attacker can use the private key to digitally sign documents and pretend to be the authorized user. Both the holders of a digital certificate and the issuing authority must protect the computers, storage devices, or whatever they use to keep the private keys.
Checks: C-5916r354871_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Cryptography\ Value Name: ForceKeyProtection Type: REG_DWORD Value: 0x00000002 (2)

Fix: F-5916r354872_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "System cryptography: Force strong key protection for user keys stored on the computer" to "User must enter a password each time they use a key".

b
Windows Server 2019 must have the built-in Windows password complexity policy enabled.
IA-5 - Medium - CCI-000192 - V-205652 - SV-205652r569188_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000192
Version
WN19-AC-000080
Vuln IDs
  • V-205652
  • V-93459
Rule IDs
  • SV-205652r569188_rule
  • SV-103545
The use of complex passwords increases their strength against attack. The built-in Windows password complexity policy requires passwords to contain at least three of the four types of characters (numbers, uppercase and lowercase letters, and special characters) and prevents the inclusion of user names or parts of user names. Satisfies: SRG-OS-000069-GPOS-00037, SRG-OS-000070-GPOS-00038, SRG-OS-000071-GPOS-00039, SRG-OS-000266-GPOS-00101
Checks: C-5917r354874_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy. If the value for "Password must meet complexity requirements" is not set to "Enabled", this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "PasswordComplexity" equals "0" in the file, this is a finding. Note: If an external password filter is in use that enforces all four character types and requires this setting to be set to "Disabled", this would not be considered a finding. If this setting does not affect the use of an external password filter, it must be enabled for fallback purposes.

Fix: F-5917r354875_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy >> "Password must meet complexity requirements" to "Enabled".

c
Windows Server 2019 reversible password encryption must be disabled.
IA-5 - High - CCI-000196 - V-205653 - SV-205653r877397_rule
RMF Control
IA-5
Severity
High
CCI
CCI-000196
Version
WN19-AC-000090
Vuln IDs
  • V-205653
  • V-93465
Rule IDs
  • SV-205653r877397_rule
  • SV-103551
Storing passwords using reversible encryption is essentially the same as storing clear-text versions of the passwords, which are easily compromised. For this reason, this policy must never be enabled.
Checks: C-5918r354877_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy. If the value for "Store passwords using reversible encryption" is not set to "Disabled", this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "ClearTextPassword" equals "1" in the file, this is a finding.

Fix: F-5918r354878_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy >> "Store passwords using reversible encryption" to "Disabled".

c
Windows Server 2019 must be configured to prevent the storage of the LAN Manager hash of passwords.
IA-5 - High - CCI-000196 - V-205654 - SV-205654r877397_rule
RMF Control
IA-5
Severity
High
CCI
CCI-000196
Version
WN19-SO-000300
Vuln IDs
  • V-205654
  • V-93467
Rule IDs
  • SV-205654r877397_rule
  • SV-103553
The LAN Manager hash uses a weak encryption algorithm and there are several tools available that use this hash to retrieve account passwords. This setting controls whether a LAN Manager hash of the password is stored in the SAM the next time the password is changed.
Checks: C-5919r354880_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\ Value Name: NoLMHash Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5919r354881_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: Do not store LAN Manager hash value on next password change" to "Enabled".

b
Windows Server 2019 unencrypted passwords must not be sent to third-party Server Message Block (SMB) servers.
IA-5 - Medium - CCI-000197 - V-205655 - SV-205655r877396_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000197
Version
WN19-SO-000180
Vuln IDs
  • V-205655
  • V-93469
Rule IDs
  • SV-205655r877396_rule
  • SV-103555
Some non-Microsoft SMB servers only support unencrypted (plain-text) password authentication. Sending plain-text passwords across the network when authenticating to an SMB server reduces the overall security of the environment. Check with the vendor of the SMB server to determine if there is a way to support encrypted password authentication.
Checks: C-5920r354883_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters\ Value Name: EnablePlainTextPassword Value Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-5920r354884_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Microsoft Network Client: Send unencrypted password to third-party SMB servers" to "Disabled".

b
Windows Server 2019 minimum password age must be configured to at least one day.
IA-5 - Medium - CCI-000198 - V-205656 - SV-205656r569188_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000198
Version
WN19-AC-000060
Vuln IDs
  • V-205656
  • V-93471
Rule IDs
  • SV-205656r569188_rule
  • SV-103557
Permitting passwords to be changed in immediate succession within the same day allows users to cycle passwords through their history database. This enables users to effectively negate the purpose of mandating periodic password changes.
Checks: C-5921r354886_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy. If the value for the "Minimum password age" is set to "0" days ("Password can be changed immediately"), this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "MinimumPasswordAge" equals "0" in the file, this is a finding.

Fix: F-5921r354887_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy >> "Minimum password age" to at least "1" day.

b
Windows Server 2019 passwords for the built-in Administrator account must be changed at least every 60 days.
IA-5 - Medium - CCI-000199 - V-205657 - SV-205657r928651_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000199
Version
WN19-00-000020
Vuln IDs
  • V-205657
  • V-93473
Rule IDs
  • SV-205657r928651_rule
  • SV-103559
The longer a password is in use, the greater the opportunity for someone to gain unauthorized knowledge of the password. The built-in Administrator account is not generally used and its password might not be changed as frequently as necessary. Changing the password for the built-in Administrator account on a regular basis will limit its exposure. Windows LAPS must be used to change the built-in Administrator account password.
Checks: C-5922r928651_chk

If there are no enabled local Administrator accounts, this is Not Applicable. Review the password last set date for the enabled local Administrator account. On the local domain-joined workstation: Open "PowerShell". Enter "Get-LocalUser -Name * | Select-Object *". If the "PasswordLastSet" date is greater than "60" days old for the local Administrator account for administering the computer/domain, this is a finding. Verify LAPS is configured and operational. Navigate to Local Computer Policy >> Computer Configuration >> Administrative Templates >> System >> LAPS >> Password Settings >> Set to enabled. Password Complexity, large letters + small letters + numbers + special, Password Length 14, Password Age 60. If not configured as shown, this is a finding. Navigate to Local Computer Policy >> Computer Configuration >> Administrative Templates >> System >> LAPS >> Password Settings >> Name of administrator Account to manage >> Set to enabled >> Administrator account name is populated. If it is not, this is a finding. Verify LAPS Operational logs >> Event Viewer >> Applications and Services Logs >> Microsoft >> Windows >> LAPS >> Operational. Verify LAPS policy process is completing. If it is not, this is a finding.

Fix: F-5922r928650_fix

Change the enabled local Administrator account password at least every 60 days. Windows LAPS must be used to change the built-in Administrator account password. Domain-joined systems can configure this to occur more frequently. LAPS will change the password every 30 days by default. More information is available at: https://techcommunity.microsoft.com/t5/windows-it-pro-blog/by-popular-demand-windows-laps-available-now/ba-p/3788747 https://learn.microsoft.com/en-us/windows-server/identity/laps/laps-overview#windows-laps-supported-platforms-and-azure-ad-laps-preview-status

b
Windows Server 2019 passwords must be configured to expire.
IA-5 - Medium - CCI-000199 - V-205658 - SV-205658r857297_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000199
Version
WN19-00-000210
Vuln IDs
  • V-205658
  • V-93475
Rule IDs
  • SV-205658r857297_rule
  • SV-103561
Passwords that do not expire or are reused increase the exposure of a password with greater probability of being discovered or cracked.
Checks: C-5923r857295_chk

Review the password never expires status for enabled user accounts. Open "PowerShell". Domain Controllers: Enter "Search-ADAccount -PasswordNeverExpires -UsersOnly | FT Name, PasswordNeverExpires, Enabled". Exclude application accounts, disabled accounts (e.g., DefaultAccount, Guest) and the krbtgt account. If any enabled user accounts are returned with a "PasswordNeverExpires" status of "True", this is a finding. Member servers and standalone or nondomain-joined systems: Enter 'Get-CimInstance -Class Win32_Useraccount -Filter "PasswordExpires=False and LocalAccount=True" | FT Name, PasswordExpires, Disabled, LocalAccount'. Exclude application accounts and disabled accounts (e.g., DefaultAccount, Guest). If any enabled user accounts are returned with a "PasswordExpires" status of "False", this is a finding.

Fix: F-5923r857296_fix

Configure all enabled user account passwords to expire. Uncheck "Password never expires" for all enabled user accounts in Active Directory Users and Computers for domain accounts and Users in Computer Management for member servers and standalone or nondomain-joined systems. Document any exceptions with the ISSO.

b
Windows Server 2019 maximum password age must be configured to 60 days or less.
IA-5 - Medium - CCI-000199 - V-205659 - SV-205659r569188_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000199
Version
WN19-AC-000050
Vuln IDs
  • V-205659
  • V-93477
Rule IDs
  • SV-205659r569188_rule
  • SV-103563
The longer a password is in use, the greater the opportunity for someone to gain unauthorized knowledge of the passwords. Scheduled changing of passwords hinders the ability of unauthorized system users to crack passwords and gain access to a system.
Checks: C-5924r354895_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy. If the value for the "Maximum password age" is greater than "60" days, this is a finding. If the value is set to "0" (never expires), this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "MaximumPasswordAge" is greater than "60" or equal to "0" in the file, this is a finding.

Fix: F-5924r354896_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy >> "Maximum password age" to "60" days or less (excluding "0", which is unacceptable).

b
Windows Server 2019 password history must be configured to 24 passwords remembered.
IA-5 - Medium - CCI-000200 - V-205660 - SV-205660r569188_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000200
Version
WN19-AC-000040
Vuln IDs
  • V-205660
  • V-93479
Rule IDs
  • SV-205660r569188_rule
  • SV-103565
A system is more vulnerable to unauthorized access when system users recycle the same password several times without being required to change to a unique password on a regularly scheduled basis. This enables users to effectively negate the purpose of mandating periodic password changes. The default value is "24" for Windows domain systems. DoD has decided this is the appropriate value for all Windows systems.
Checks: C-5925r354898_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy. If the value for "Enforce password history" is less than "24" passwords remembered, this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "PasswordHistorySize" is less than "24" in the file, this is a finding.

Fix: F-5925r354899_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy >> "Enforce password history" to "24" passwords remembered.

b
Windows Server 2019 manually managed application account passwords must be at least 15 characters in length.
IA-5 - Medium - CCI-000205 - V-205661 - SV-205661r569188_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000205
Version
WN19-00-000050
Vuln IDs
  • V-205661
  • V-93461
Rule IDs
  • SV-205661r569188_rule
  • SV-103547
Application/service account passwords must be of sufficient length to prevent being easily cracked. Application/service accounts that are manually managed must have passwords at least 15 characters in length.
Checks: C-5926r354901_chk

Determine if manually managed application/service accounts exist. If none exist, this is NA. Verify the organization has a policy to ensure passwords for manually managed application/service accounts are at least 15 characters in length. If such a policy does not exist or has not been implemented, this is a finding.

Fix: F-5926r354902_fix

Establish a policy that requires application/service account passwords that are manually managed to be at least 15 characters in length. Ensure the policy is enforced.

b
Windows Server 2019 minimum password length must be configured to 14 characters.
IA-5 - Medium - CCI-000205 - V-205662 - SV-205662r569188_rule
RMF Control
IA-5
Severity
Medium
CCI
CCI-000205
Version
WN19-AC-000070
Vuln IDs
  • V-205662
  • V-93463
Rule IDs
  • SV-205662r569188_rule
  • SV-103549
Information systems not protected with strong password schemes (including passwords of minimum length) provide the opportunity for anyone to crack the password, thus gaining access to the system and compromising the device, information, or the local network.
Checks: C-5927r354904_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy. If the value for the "Minimum password length," is less than "14" characters, this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "MinimumPasswordLength" is less than "14" in the file, this is a finding.

Fix: F-5927r354905_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Password Policy >> "Minimum password length" to "14" characters.

c
Windows Server 2019 local volumes must use a format that supports NTFS attributes.
AC-3 - High - CCI-000213 - V-205663 - SV-205663r569188_rule
RMF Control
AC-3
Severity
High
CCI
CCI-000213
Version
WN19-00-000130
Vuln IDs
  • V-205663
  • V-92991
Rule IDs
  • SV-205663r569188_rule
  • SV-103079
The ability to set access permissions and auditing is critical to maintaining the security and proper access controls of a system. To support this, volumes must be formatted using a file system that supports NTFS attributes.
Checks: C-5928r354907_chk

Open "Computer Management". Select "Disk Management" under "Storage". For each local volume, if the file system does not indicate "NTFS", this is a finding. "ReFS" (resilient file system) is also acceptable and would not be a finding. This does not apply to system partitions such the Recovery and EFI System Partition.

Fix: F-5928r354908_fix

Format volumes to use NTFS or ReFS.

a
Windows Server 2019 non-administrative accounts or groups must only have print permissions on printer shares.
AC-3 - Low - CCI-000213 - V-205664 - SV-205664r569188_rule
RMF Control
AC-3
Severity
Low
CCI
CCI-000213
Version
WN19-00-000180
Vuln IDs
  • V-205664
  • V-92993
Rule IDs
  • SV-205664r569188_rule
  • SV-103081
Windows shares are a means by which files, folders, printers, and other resources can be published for network users to access. Improper configuration can permit access to devices and data beyond a user's need.
Checks: C-5929r354910_chk

Open "Printers & scanners" in "Settings". If there are no printers configured, this is NA. (Exclude Microsoft Print to PDF and Microsoft XPS Document Writer, which do not support sharing.) For each printer: Select the printer and "Manage". Select "Printer Properties". Select the "Sharing" tab. If "Share this printer" is checked, select the "Security" tab. If any standard user accounts or groups have permissions other than "Print", this is a finding. The default is for the "Everyone" group to be given "Print" permission. "All APPLICATION PACKAGES" and "CREATOR OWNER" are not standard user accounts.

Fix: F-5929r354911_fix

Configure the permissions on shared printers to restrict standard users to only have Print permissions.

b
Windows Server 2019 Access this computer from the network user right must only be assigned to the Administrators, Authenticated Users, and Enterprise Domain Controllers groups on domain controllers.
AC-3 - Medium - CCI-000213 - V-205665 - SV-205665r569188_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-DC-000340
Vuln IDs
  • V-205665
  • V-92995
Rule IDs
  • SV-205665r569188_rule
  • SV-103083
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Access this computer from the network" right may access resources on the system, and this right must be limited to those requiring it.
Checks: C-5930r354913_chk

This applies to domain controllers. It is NA for other systems. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Access this computer from the network" right, this is a finding. - Administrators - Authenticated Users - Enterprise Domain Controllers For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeNetworkLogonRight" user right, this is a finding. S-1-5-32-544 (Administrators) S-1-5-11 (Authenticated Users) S-1-5-9 (Enterprise Domain Controllers) If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-5930r354914_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Access this computer from the network" to include only the following accounts or groups: - Administrators - Authenticated Users - Enterprise Domain Controllers

b
Windows Server 2019 Allow log on through Remote Desktop Services user right must only be assigned to the Administrators group on domain controllers.
AC-3 - Medium - CCI-000213 - V-205666 - SV-205666r569188_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-DC-000360
Vuln IDs
  • V-205666
  • V-92997
Rule IDs
  • SV-205666r569188_rule
  • SV-103085
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Allow log on through Remote Desktop Services" user right can access a system through Remote Desktop.
Checks: C-5931r354916_chk

This applies to domain controllers, it is NA for other systems. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Allow log on through Remote Desktop Services" user right, this is a finding. - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeRemoteInteractiveLogonRight" user right, this is a finding. S-1-5-32-544 (Administrators)

Fix: F-5931r354917_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Allow log on through Remote Desktop Services" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 Deny access to this computer from the network user right on domain controllers must be configured to prevent unauthenticated access.
AC-3 - Medium - CCI-000213 - V-205667 - SV-205667r569188_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-DC-000370
Vuln IDs
  • V-205667
  • V-92999
Rule IDs
  • SV-205667r569188_rule
  • SV-103087
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny access to this computer from the network" user right defines the accounts that are prevented from logging on from the network. The Guests group must be assigned this right to prevent unauthenticated access.
Checks: C-5932r354919_chk

This applies to domain controllers. A separate version applies to other systems. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If the following accounts or groups are not defined for the "Deny access to this computer from the network" user right, this is a finding: - Guests Group For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If the following SIDs are not defined for the "SeDenyNetworkLogonRight" user right, this is a finding. S-1-5-32-546 (Guests)

Fix: F-5932r354920_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny access to this computer from the network" to include the following: - Guests Group

b
Windows Server 2019 Deny log on as a batch job user right on domain controllers must be configured to prevent unauthenticated access.
AC-3 - Medium - CCI-000213 - V-205668 - SV-205668r569188_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-DC-000380
Vuln IDs
  • V-205668
  • V-93001
Rule IDs
  • SV-205668r569188_rule
  • SV-103089
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny log on as a batch job" user right defines accounts that are prevented from logging on to the system as a batch job, such as Task Scheduler. The Guests group must be assigned to prevent unauthenticated access.
Checks: C-5933r354922_chk

This applies to domain controllers. A separate version applies to other systems. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If the following accounts or groups are not defined for the "Deny log on as a batch job" user right, this is a finding: - Guests Group For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If the following SID(s) are not defined for the "SeDenyBatchLogonRight" user right, this is a finding: S-1-5-32-546 (Guests)

Fix: F-5933r354923_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny log on as a batch job" to include the following: - Guests Group

b
Windows Server 2019 Deny log on as a service user right must be configured to include no accounts or groups (blank) on domain controllers.
AC-3 - Medium - CCI-000213 - V-205669 - SV-205669r569188_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-DC-000390
Vuln IDs
  • V-205669
  • V-93003
Rule IDs
  • SV-205669r569188_rule
  • SV-103091
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny log on as a service" user right defines accounts that are denied logon as a service. Incorrect configurations could prevent services from starting and result in a denial of service.
Checks: C-5934r354925_chk

This applies to domain controllers. A separate version applies to other systems. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups are defined for the "Deny log on as a service" user right, this is a finding. For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs are granted the "SeDenyServiceLogonRight" user right, this is a finding.

Fix: F-5934r354926_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny log on as a service" to include no entries (blank).

b
Windows Server 2019 Deny log on locally user right on domain controllers must be configured to prevent unauthenticated access.
AC-3 - Medium - CCI-000213 - V-205670 - SV-205670r569188_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-DC-000400
Vuln IDs
  • V-205670
  • V-93005
Rule IDs
  • SV-205670r569188_rule
  • SV-103093
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny log on locally" user right defines accounts that are prevented from logging on interactively. The Guests group must be assigned this right to prevent unauthenticated access.
Checks: C-5935r354928_chk

This applies to domain controllers. A separate version applies to other systems. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If the following accounts or groups are not defined for the "Deny log on locally" user right, this is a finding: - Guests Group For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If the following SID(s) are not defined for the "SeDenyInteractiveLogonRight" user right, this is a finding: S-1-5-32-546 (Guests)

Fix: F-5935r354929_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny log on locally" to include the following: - Guests Group

b
Windows Server 2019 "Access this computer from the network" user right must only be assigned to the Administrators and Authenticated Users groups on domain-joined member servers and standalone or nondomain-joined systems.
AC-3 - Medium - CCI-000213 - V-205671 - SV-205671r857331_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-MS-000070
Vuln IDs
  • V-205671
  • V-93007
Rule IDs
  • SV-205671r857331_rule
  • SV-103095
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Access this computer from the network" user right may access resources on the system, and this right must be limited to those requiring it.
Checks: C-5936r857330_chk

This applies to member servers and standalone or nondomain-joined systems. A separate version applies to domain controllers. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Access this computer from the network" user right, this is a finding: - Administrators - Authenticated Users For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeNetworkLogonRight" user right, this is a finding: S-1-5-32-544 (Administrators) S-1-5-11 (Authenticated Users) If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-5936r354932_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Access this computer from the network" to include only the following accounts or groups: - Administrators - Authenticated Users

b
Windows Server 2019 "Deny access to this computer from the network" user right on domain-joined member servers must be configured to prevent access from highly privileged domain accounts and local accounts and from unauthenticated access on all systems.
AC-3 - Medium - CCI-000213 - V-205672 - SV-205672r857333_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-MS-000080
Vuln IDs
  • V-205672
  • V-93009
Rule IDs
  • SV-205672r857333_rule
  • SV-103097
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny access to this computer from the network" user right defines the accounts that are prevented from logging on from the network. In an Active Directory Domain, denying logons to the Enterprise Admins and Domain Admins groups on lower-trust systems helps mitigate the risk of privilege escalation from credential theft attacks, which could lead to the compromise of an entire domain. Local accounts on domain-joined systems must also be assigned this right to decrease the risk of lateral movement resulting from credential theft attacks. The Guests group must be assigned this right to prevent unauthenticated access.
Checks: C-5937r857332_chk

This applies to member servers and standalone or nondomain-joined systems. A separate version applies to domain controllers. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If the following accounts or groups are not defined for the "Deny access to this computer from the network" user right, this is a finding: Domain Systems Only: - Enterprise Admins group - Domain Admins group - "Local account and member of Administrators group" or "Local account" (see Note below) All Systems: - Guests group For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If the following SIDs are not defined for the "SeDenyNetworkLogonRight" user right, this is a finding. Domain Systems Only: S-1-5-root domain-519 (Enterprise Admins) S-1-5-domain-512 (Domain Admins) S-1-5-114 ("Local account and member of Administrators group") or S-1-5-113 ("Local account") All Systems: S-1-5-32-546 (Guests) Note: These are built-in security groups. "Local account" is more restrictive but may cause issues on servers such as systems that provide failover clustering.

Fix: F-5937r354935_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny access to this computer from the network" to include the following: Domain Systems Only: - Enterprise Admins group - Domain Admins group - "Local account and member of Administrators group" or "Local account" (see Note below) All Systems: - Guests group Note: These are built-in security groups. "Local account" is more restrictive but may cause issues on servers such as systems that provide failover clustering.

b
Windows Server 2019 "Deny log on as a batch job" user right on domain-joined member servers must be configured to prevent access from highly privileged domain accounts and from unauthenticated access on all systems.
AC-3 - Medium - CCI-000213 - V-205673 - SV-205673r857335_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-MS-000090
Vuln IDs
  • V-205673
  • V-93011
Rule IDs
  • SV-205673r857335_rule
  • SV-103099
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny log on as a batch job" user right defines accounts that are prevented from logging on to the system as a batch job, such as Task Scheduler. In an Active Directory Domain, denying logons to the Enterprise Admins and Domain Admins groups on lower-trust systems helps mitigate the risk of privilege escalation from credential theft attacks, which could lead to the compromise of an entire domain. The Guests group must be assigned to prevent unauthenticated access.
Checks: C-5938r857334_chk

This applies to member servers and standalone or nondomain-joined systems. A separate version applies to domain controllers. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If the following accounts or groups are not defined for the "Deny log on as a batch job" user right, this is a finding: Domain Systems Only: - Enterprise Admins Group - Domain Admins Group All Systems: - Guests Group For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If the following SIDs are not defined for the "SeDenyBatchLogonRight" user right, this is a finding. Domain Systems Only: S-1-5-root domain-519 (Enterprise Admins) S-1-5-domain-512 (Domain Admins) All Systems: S-1-5-32-546 (Guests)

Fix: F-5938r354938_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny log on as a batch job" to include the following: Domain Systems Only: - Enterprise Admins Group - Domain Admins Group All Systems: - Guests Group

b
Windows Server 2019 "Deny log on as a service" user right on domain-joined member servers must be configured to prevent access from highly privileged domain accounts. No other groups or accounts must be assigned this right.
AC-3 - Medium - CCI-000213 - V-205674 - SV-205674r891848_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-MS-000100
Vuln IDs
  • V-205674
  • V-93013
Rule IDs
  • SV-205674r891848_rule
  • SV-103101
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny log on as a service" user right defines accounts that are denied logon as a service. In an Active Directory Domain, denying logons to the Enterprise Admins and Domain Admins groups on lower-trust systems helps mitigate the risk of privilege escalation from credential theft attacks, which could lead to the compromise of an entire domain. Incorrect configurations could prevent services from starting and result in a denial of service.
Checks: C-5939r891848_chk

This applies to member servers only. A separate version applies to domain controllers. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If the following accounts or groups are not defined for the "Deny log on as a service" user right on domain-joined systems, this is a finding: - Enterprise Admins Group - Domain Admins Group If any accounts or groups are defined for the "Deny log on as a service" user right on nondomain-joined systems, this is a finding. For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If the following SIDs are not defined for the "SeDenyServiceLogonRight" user right on domain-joined systems, this is a finding: S-1-5-root domain-519 (Enterprise Admins) S-1-5-domain-512 (Domain Admins) If any SIDs are defined for the user right, this is a finding.

Fix: F-5939r354941_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny log on as a service" to include the following: Domain systems: - Enterprise Admins Group - Domain Admins Group

b
Windows Server 2019 "Deny log on locally" user right on domain-joined member servers must be configured to prevent access from highly privileged domain accounts and from unauthenticated access on all systems.
AC-3 - Medium - CCI-000213 - V-205675 - SV-205675r857337_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-MS-000110
Vuln IDs
  • V-205675
  • V-93015
Rule IDs
  • SV-205675r857337_rule
  • SV-103103
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny log on locally" user right defines accounts that are prevented from logging on interactively. In an Active Directory Domain, denying logons to the Enterprise Admins and Domain Admins groups on lower-trust systems helps mitigate the risk of privilege escalation from credential theft attacks, which could lead to the compromise of an entire domain. The Guests group must be assigned this right to prevent unauthenticated access.
Checks: C-5940r857336_chk

This applies to member servers and standalone or nondomain-joined systems. A separate version applies to domain controllers. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If the following accounts or groups are not defined for the "Deny log on locally" user right, this is a finding: Domain Systems Only: - Enterprise Admins Group - Domain Admins Group All Systems: - Guests Group For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If the following SIDs are not defined for the "SeDenyInteractiveLogonRight" user right, this is a finding: Domain Systems Only: S-1-5-root domain-519 (Enterprise Admins) S-1-5-domain-512 (Domain Admins) All Systems: S-1-5-32-546 (Guests)

Fix: F-5940r354944_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny log on locally" to include the following: Domain Systems Only: - Enterprise Admins Group - Domain Admins Group All Systems: - Guests Group

b
Windows Server 2019 Allow log on locally user right must only be assigned to the Administrators group.
AC-3 - Medium - CCI-000213 - V-205676 - SV-205676r569188_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-000213
Version
WN19-UR-000030
Vuln IDs
  • V-205676
  • V-93017
Rule IDs
  • SV-205676r569188_rule
  • SV-103105
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Allow log on locally" user right can log on interactively to a system.
Checks: C-5941r354946_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Allow log on locally" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeInteractiveLogonRight" user right, this is a finding: S-1-5-32-544 (Administrators) If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-5941r354947_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Allow log on locally" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 must have the roles and features required by the system documented.
CM-7 - Medium - CCI-000381 - V-205677 - SV-205677r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-00-000270
Vuln IDs
  • V-205677
  • V-93381
Rule IDs
  • SV-205677r569188_rule
  • SV-103467
Unnecessary roles and features increase the attack surface of a system. Limiting roles and features of a system to only those necessary reduces this potential. The standard installation option (previously called Server Core) further reduces this when selected at installation.
Checks: C-5942r354949_chk

Required roles and features will vary based on the function of the individual system. Roles and features specifically required to be disabled per the STIG are identified in separate requirements. If the organization has not documented the roles and features required for the system(s), this is a finding. The PowerShell command "Get-WindowsFeature" will list all roles and features with an "Install State".

Fix: F-5942r354950_fix

Document the roles and features required for the system to operate. Uninstall any that are not required.

b
Windows Server 2019 must not have the Fax Server role installed.
CM-7 - Medium - CCI-000381 - V-205678 - SV-205678r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-00-000320
Vuln IDs
  • V-205678
  • V-93383
Rule IDs
  • SV-205678r569188_rule
  • SV-103469
Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system.
Checks: C-5943r354952_chk

Open "PowerShell". Enter "Get-WindowsFeature | Where Name -eq Fax". If "Installed State" is "Installed", this is a finding. An Installed State of "Available" or "Removed" is not a finding.

Fix: F-5943r354953_fix

Uninstall the "Fax Server" role. Start "Server Manager". Select the server with the role. Scroll down to "ROLES AND FEATURES" in the right pane. Select "Remove Roles and Features" from the drop-down "TASKS" list. Select the appropriate server on the "Server Selection" page and click "Next". Deselect "Fax Server" on the "Roles" page. Click "Next" and "Remove" as prompted.

b
Windows Server 2019 must not have the Peer Name Resolution Protocol installed.
CM-7 - Medium - CCI-000381 - V-205679 - SV-205679r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-00-000340
Vuln IDs
  • V-205679
  • V-93385
Rule IDs
  • SV-205679r569188_rule
  • SV-103471
Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system.
Checks: C-5944r354955_chk

Open "PowerShell". Enter "Get-WindowsFeature | Where Name -eq PNRP". If "Installed State" is "Installed", this is a finding. An Installed State of "Available" or "Removed" is not a finding.

Fix: F-5944r354956_fix

Uninstall the "Peer Name Resolution Protocol" feature. Start "Server Manager". Select the server with the feature. Scroll down to "ROLES AND FEATURES" in the right pane. Select "Remove Roles and Features" from the drop-down "TASKS" list. Select the appropriate server on the "Server Selection" page and click "Next". Deselect "Peer Name Resolution Protocol" on the "Features" page. Click "Next" and "Remove" as prompted.

b
Windows Server 2019 must not have Simple TCP/IP Services installed.
CM-7 - Medium - CCI-000381 - V-205680 - SV-205680r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-00-000350
Vuln IDs
  • V-205680
  • V-93387
Rule IDs
  • SV-205680r569188_rule
  • SV-103473
Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system.
Checks: C-5945r354958_chk

Open "PowerShell". Enter "Get-WindowsFeature | Where Name -eq Simple-TCPIP". If "Installed State" is "Installed", this is a finding. An Installed State of "Available" or "Removed" is not a finding.

Fix: F-5945r354959_fix

Uninstall the "Simple TCP/IP Services" feature. Start "Server Manager". Select the server with the feature. Scroll down to "ROLES AND FEATURES" in the right pane. Select "Remove Roles and Features" from the drop-down "TASKS" list. Select the appropriate server on the "Server Selection" page and click "Next". Deselect "Simple TCP/IP Services" on the "Features" page. Click "Next" and "Remove" as prompted.

b
Windows Server 2019 must not have the TFTP Client installed.
CM-7 - Medium - CCI-000381 - V-205681 - SV-205681r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-00-000370
Vuln IDs
  • V-205681
  • V-93389
Rule IDs
  • SV-205681r569188_rule
  • SV-103475
Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system.
Checks: C-5946r354961_chk

Open "PowerShell". Enter "Get-WindowsFeature | Where Name -eq TFTP-Client". If "Installed State" is "Installed", this is a finding. An Installed State of "Available" or "Removed" is not a finding.

Fix: F-5946r354962_fix

Uninstall the "TFTP Client" feature. Start "Server Manager". Select the server with the feature. Scroll down to "ROLES AND FEATURES" in the right pane. Select "Remove Roles and Features" from the drop-down "TASKS" list. Select the appropriate server on the "Server Selection" page and click "Next". Deselect "TFTP Client" on the "Features" page. Click "Next" and "Remove" as prompted.

b
Windows Server 2019 must not have the Server Message Block (SMB) v1 protocol installed.
CM-7 - Medium - CCI-000381 - V-205682 - SV-205682r819711_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-00-000380
Vuln IDs
  • V-205682
  • V-93391
Rule IDs
  • SV-205682r819711_rule
  • SV-103477
SMBv1 is a legacy protocol that uses the MD5 algorithm as part of SMB. MD5 is known to be vulnerable to a number of attacks such as collision and preimage attacks and is not FIPS compliant.
Checks: C-5947r819710_chk

Different methods are available to disable SMBv1 on Windows Server 2019. This is the preferred method; however, if WN19-00-000390 and WN19-00-000400 are configured, this is NA. Open "Windows PowerShell" with elevated privileges (run as administrator). Enter "Get-WindowsFeature -Name FS-SMB1". If "Installed State" is "Installed", this is a finding. An Installed State of "Available" or "Removed" is not a finding.

Fix: F-5947r354965_fix

Uninstall the SMBv1 protocol. Open "Windows PowerShell" with elevated privileges (run as administrator). Enter "Uninstall-WindowsFeature -Name FS-SMB1 -Restart". (Omit the Restart parameter if an immediate restart of the system cannot be done.) Alternately: Start "Server Manager". Select the server with the feature. Scroll down to "ROLES AND FEATURES" in the right pane. Select "Remove Roles and Features" from the drop-down "TASKS" list. Select the appropriate server on the "Server Selection" page and click "Next". Deselect "SMB 1.0/CIFS File Sharing Support" on the "Features" page. Click "Next" and "Remove" as prompted.

b
Windows Server 2019 must have the Server Message Block (SMB) v1 protocol disabled on the SMB server.
CM-7 - Medium - CCI-000381 - V-205683 - SV-205683r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-00-000390
Vuln IDs
  • V-205683
  • V-93393
Rule IDs
  • SV-205683r569188_rule
  • SV-103479
SMBv1 is a legacy protocol that uses the MD5 algorithm as part of SMB. MD5 is known to be vulnerable to a number of attacks such as collision and preimage attacks as well as not being FIPS compliant.
Checks: C-5948r354967_chk

Different methods are available to disable SMBv1 on Windows Server 2019, if WN19-00-000380 is configured, this is NA. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\LanmanServer\Parameters\ Value Name: SMB1 Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-5948r354968_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> MS Security Guide >> "Configure SMBv1 Server" to "Disabled". The system must be restarted for the change to take effect. This policy setting requires the installation of the SecGuide custom templates included with the STIG package. "SecGuide.admx" and "SecGuide.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.

b
Windows Server 2019 must have the Server Message Block (SMB) v1 protocol disabled on the SMB client.
CM-7 - Medium - CCI-000381 - V-205684 - SV-205684r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-00-000400
Vuln IDs
  • V-205684
  • V-93395
Rule IDs
  • SV-205684r569188_rule
  • SV-103481
SMBv1 is a legacy protocol that uses the MD5 algorithm as part of SMB. MD5 is known to be vulnerable to a number of attacks such as collision and preimage attacks as well as not being FIPS compliant.
Checks: C-5949r354970_chk

Different methods are available to disable SMBv1 on Windows Server 2019, if WN19-00-000380 is configured, this is NA. If the following registry value is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\mrxsmb10\ Value Name: Start Type: REG_DWORD Value: 0x00000004 (4)

Fix: F-5949r354971_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> MS Security Guide >> "Configure SMBv1 client driver" to "Enabled" with "Disable driver (recommended)" selected for "Configure MrxSmb10 driver". The system must be restarted for the changes to take effect. This policy setting requires the installation of the SecGuide custom templates included with the STIG package. "SecGuide.admx" and "SecGuide.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.

b
Windows Server 2019 must not have Windows PowerShell 2.0 installed.
CM-7 - Medium - CCI-000381 - V-205685 - SV-205685r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-00-000410
Vuln IDs
  • V-205685
  • V-93397
Rule IDs
  • SV-205685r569188_rule
  • SV-103483
Windows PowerShell 5.x added advanced logging features that can provide additional detail when malware has been run on a system. Disabling the Windows PowerShell 2.0 mitigates against a downgrade attack that evades the Windows PowerShell 5.x script block logging feature.
Checks: C-5950r354973_chk

Open "PowerShell". Enter "Get-WindowsFeature | Where Name -eq PowerShell-v2". If "Installed State" is "Installed", this is a finding. An Installed State of "Available" or "Removed" is not a finding.

Fix: F-5950r354974_fix

Uninstall the "Windows PowerShell 2.0 Engine". Start "Server Manager". Select the server with the feature. Scroll down to "ROLES AND FEATURES" in the right pane. Select "Remove Roles and Features" from the drop-down "TASKS" list. Select the appropriate server on the "Server Selection" page and click "Next". Deselect "Windows PowerShell 2.0 Engine" under "Windows PowerShell" on the "Features" page. Click "Next" and "Remove" as prompted.

b
Windows Server 2019 must prevent the display of slide shows on the lock screen.
CM-7 - Medium - CCI-000381 - V-205686 - SV-205686r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-CC-000010
Vuln IDs
  • V-205686
  • V-93399
Rule IDs
  • SV-205686r569188_rule
  • SV-103485
Slide shows that are displayed on the lock screen could display sensitive information to unauthorized personnel. Turning off this feature will limit access to the information to a logged-on user.
Checks: C-5951r354976_chk

Verify the registry value below. If it does not exist or is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Personalization\ Value Name: NoLockScreenSlideshow Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5951r354977_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Control Panel >> Personalization >> "Prevent enabling lock screen slide show" to "Enabled".

b
Windows Server 2019 must have WDigest Authentication disabled.
CM-7 - Medium - CCI-000381 - V-205687 - SV-205687r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-CC-000020
Vuln IDs
  • V-205687
  • V-93401
Rule IDs
  • SV-205687r569188_rule
  • SV-103487
When the WDigest Authentication protocol is enabled, plain-text passwords are stored in the Local Security Authority Subsystem Service (LSASS), exposing them to theft. WDigest is disabled by default in Windows Server 2019. This setting ensures this is enforced.
Checks: C-5952r354979_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\SecurityProviders\Wdigest\ Value Name: UseLogonCredential Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-5952r354980_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> MS Security Guide >> "WDigest Authentication (disabling may require KB2871997)" to "Disabled". This policy setting requires the installation of the SecGuide custom templates included with the STIG package. "SecGuide.admx" and " SecGuide.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.

b
Windows Server 2019 downloading print driver packages over HTTP must be turned off.
CM-7 - Medium - CCI-000381 - V-205688 - SV-205688r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-CC-000150
Vuln IDs
  • V-205688
  • V-93403
Rule IDs
  • SV-205688r569188_rule
  • SV-103489
Some features may communicate with the vendor, sending system information or downloading data or components for the feature. Turning off this capability will prevent potentially sensitive information from being sent outside the enterprise and will prevent uncontrolled updates to the system. This setting prevents the computer from downloading print driver packages over HTTP.
Checks: C-5953r354982_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows NT\Printers\ Value Name: DisableWebPnPDownload Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5953r354983_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Internet Communication Management >> Internet Communication settings >> "Turn off downloading of print drivers over HTTP" to "Enabled".

b
Windows Server 2019 printing over HTTP must be turned off.
CM-7 - Medium - CCI-000381 - V-205689 - SV-205689r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-CC-000160
Vuln IDs
  • V-205689
  • V-93405
Rule IDs
  • SV-205689r569188_rule
  • SV-103491
Some features may communicate with the vendor, sending system information or downloading data or components for the feature. Turning off this capability will prevent potentially sensitive information from being sent outside the enterprise and will prevent uncontrolled updates to the system. This setting prevents the client computer from printing over HTTP, which allows the computer to print to printers on the intranet as well as the Internet.
Checks: C-5954r354985_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows NT\Printers\ Value Name: DisableHTTPPrinting Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5954r354986_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Internet Communication Management >> Internet Communication settings >> "Turn off printing over HTTP" to "Enabled".

b
Windows Server 2019 network selection user interface (UI) must not be displayed on the logon screen.
CM-7 - Medium - CCI-000381 - V-205690 - SV-205690r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-CC-000170
Vuln IDs
  • V-205690
  • V-93407
Rule IDs
  • SV-205690r569188_rule
  • SV-103493
Enabling interaction with the network selection UI allows users to change connections to available networks without signing in to Windows.
Checks: C-5955r354988_chk

Verify the registry value below. If it does not exist or is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\System\ Value Name: DontDisplayNetworkSelectionUI Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5955r354989_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Logon >> "Do not display network selection UI" to "Enabled".

a
Windows Server 2019 Application Compatibility Program Inventory must be prevented from collecting data and sending the information to Microsoft.
CM-7 - Low - CCI-000381 - V-205691 - SV-205691r569188_rule
RMF Control
CM-7
Severity
Low
CCI
CCI-000381
Version
WN19-CC-000200
Vuln IDs
  • V-205691
  • V-93409
Rule IDs
  • SV-205691r569188_rule
  • SV-103495
Some features may communicate with the vendor, sending system information or downloading data or components for the feature. Turning off this capability will prevent potentially sensitive information from being sent outside the enterprise and will prevent uncontrolled updates to the system. This setting will prevent the Program Inventory from collecting data about a system and sending the information to Microsoft.
Checks: C-5956r354991_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\AppCompat\ Value Name: DisableInventory Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5956r354992_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Application Compatibility >> "Turn off Inventory Collector" to "Enabled".

b
Windows Server 2019 Windows Defender SmartScreen must be enabled.
CM-7 - Medium - CCI-000381 - V-205692 - SV-205692r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-CC-000300
Vuln IDs
  • V-205692
  • V-93411
Rule IDs
  • SV-205692r569188_rule
  • SV-103497
Windows Defender SmartScreen helps protect systems from programs downloaded from the internet that may be malicious. Enabling SmartScreen can block potentially malicious programs or warn users.
Checks: C-5957r354994_chk

This is applicable to unclassified systems; for other systems, this is NA. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\System\ Value Name: EnableSmartScreen Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5957r354995_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> File Explorer >> "Configure Windows Defender SmartScreen" to "Enabled" with either option "Warn" or "Warn and prevent bypass" selected. Windows 2019 includes duplicate policies for this setting. It can also be configured under Computer Configuration >> Administrative Templates >> Windows Components >> Windows Defender SmartScreen >> Explorer.

b
Windows Server 2019 must disable Basic authentication for RSS feeds over HTTP.
CM-7 - Medium - CCI-000381 - V-205693 - SV-205693r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-CC-000400
Vuln IDs
  • V-205693
  • V-93413
Rule IDs
  • SV-205693r569188_rule
  • SV-103499
Basic authentication uses plain-text passwords that could be used to compromise a system. Disabling Basic authentication will reduce this potential.
Checks: C-5958r354997_chk

The default behavior is for the Windows RSS platform to not use Basic authentication over HTTP connections. If the registry value name below does not exist, this is not a finding. If it exists and is configured with a value of "0", this is not a finding. If it exists and is configured with a value of "1", this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Internet Explorer\Feeds\ Value Name: AllowBasicAuthInClear Value Type: REG_DWORD Value: 0x00000000 (0) (or if the Value Name does not exist)

Fix: F-5958r354998_fix

The default behavior is for the Windows RSS platform to not use Basic authentication over HTTP connections. If this needs to be corrected, configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> RSS Feeds >> "Turn on Basic feed authentication over HTTP" to "Not Configured" or "Disabled".

b
Windows Server 2019 must prevent Indexing of encrypted files.
CM-7 - Medium - CCI-000381 - V-205694 - SV-205694r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-CC-000410
Vuln IDs
  • V-205694
  • V-93415
Rule IDs
  • SV-205694r569188_rule
  • SV-103501
Indexing of encrypted files may expose sensitive data. This setting prevents encrypted files from being indexed.
Checks: C-5959r355000_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Windows Search\ Value Name: AllowIndexingEncryptedStoresOrItems Value Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-5959r355001_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Search >> "Allow indexing of encrypted files" to "Disabled".

b
Windows Server 2019 domain controllers must run on a machine dedicated to that function.
CM-7 - Medium - CCI-000381 - V-205695 - SV-205695r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-DC-000130
Vuln IDs
  • V-205695
  • V-93417
Rule IDs
  • SV-205695r569188_rule
  • SV-103503
Executing application servers on the same host machine with a directory server may substantially weaken the security of the directory server. Web or database server applications usually require the addition of many programs and accounts, increasing the attack surface of the computer. Some applications require the addition of privileged accounts, providing potential sources of compromise. Some applications (such as Microsoft Exchange) may require the use of network ports or services conflicting with the directory server. In this case, non-standard ports might be selected, and this could interfere with intrusion detection or prevention services.
Checks: C-5960r355003_chk

This applies to domain controllers, it is NA for other systems. Review the installed roles the domain controller is supporting. Start "Server Manager". Select "AD DS" in the left pane and the server name under "Servers" to the right. Select "Add (or Remove) Roles and Features" from "Tasks" in the "Roles and Features" section. (Cancel before any changes are made.) Determine if any additional server roles are installed. A basic domain controller setup will include the following: - Active Directory Domain Services - DNS Server - File and Storage Services If any roles not requiring installation on a domain controller are installed, this is a finding. A Domain Name System (DNS) server integrated with the directory server (e.g., AD-integrated DNS) is an acceptable application. However, the DNS server must comply with the DNS STIG security requirements. Run "Programs and Features". Review installed applications. If any applications are installed that are not required for the domain controller, this is a finding.

Fix: F-5960r355004_fix

Remove additional roles or applications such as web, database, and email from the domain controller.

b
Windows Server 2019 local users on domain-joined member servers must not be enumerated.
CM-7 - Medium - CCI-000381 - V-205696 - SV-205696r857322_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000381
Version
WN19-MS-000030
Vuln IDs
  • V-205696
  • V-93419
Rule IDs
  • SV-205696r857322_rule
  • SV-103505
The username is one part of logon credentials that could be used to gain access to a system. Preventing the enumeration of users limits this information to authorized personnel.
Checks: C-5961r857321_chk

This applies to member servers. For domain controllers and standalone or nondomain-joined systems, this is NA. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\System\ Value Name: EnumerateLocalUsers Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-5961r355007_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Logon >> "Enumerate local users on domain-joined computers" to "Disabled".

b
Windows Server 2019 must not have the Microsoft FTP service installed unless required by the organization.
CM-7 - Medium - CCI-000382 - V-205697 - SV-205697r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000382
Version
WN19-00-000330
Vuln IDs
  • V-205697
  • V-93421
Rule IDs
  • SV-205697r569188_rule
  • SV-103507
Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption.
Checks: C-5962r355009_chk

If the server has the role of an FTP server, this is NA. Open "PowerShell". Enter "Get-WindowsFeature | Where Name -eq Web-Ftp-Service". If "Installed State" is "Installed", this is a finding. An Installed State of "Available" or "Removed" is not a finding. If the system has the role of an FTP server, this must be documented with the ISSO.

Fix: F-5962r355010_fix

Uninstall the "FTP Server" role. Start "Server Manager". Select the server with the role. Scroll down to "ROLES AND FEATURES" in the right pane. Select "Remove Roles and Features" from the drop-down "TASKS" list. Select the appropriate server on the "Server Selection" page and click "Next". Deselect "FTP Server" under "Web Server (IIS)" on the "Roles" page. Click "Next" and "Remove" as prompted.

b
Windows Server 2019 must not have the Telnet Client installed.
CM-7 - Medium - CCI-000382 - V-205698 - SV-205698r569188_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-000382
Version
WN19-00-000360
Vuln IDs
  • V-205698
  • V-93423
Rule IDs
  • SV-205698r569188_rule
  • SV-103509
Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption or may provide unauthorized access to the system.
Checks: C-5963r355012_chk

Open "PowerShell". Enter "Get-WindowsFeature | Where Name -eq Telnet-Client". If "Installed State" is "Installed", this is a finding. An Installed State of "Available" or "Removed" is not a finding.

Fix: F-5963r355013_fix

Uninstall the "Telnet Client" feature. Start "Server Manager". Select the server with the feature. Scroll down to "ROLES AND FEATURES" in the right pane. Select "Remove Roles and Features" from the drop-down "TASKS" list. Select the appropriate server on the "Server Selection" page and click "Next". Deselect "Telnet Client" on the "Features" page. Click "Next" and "Remove" as prompted.

b
Windows Server 2019 shared user accounts must not be permitted.
IA-2 - Medium - CCI-000764 - V-205699 - SV-205699r569188_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
WN19-00-000070
Vuln IDs
  • V-205699
  • V-93437
Rule IDs
  • SV-205699r569188_rule
  • SV-103523
Shared accounts (accounts where two or more people log on with the same user identification) do not provide adequate identification and authentication. There is no way to provide for nonrepudiation or individual accountability for system access and resource usage.
Checks: C-5964r355015_chk

Determine whether any shared accounts exist. If no shared accounts exist, this is NA. Shared accounts, such as required by an application, may be approved by the organization. This must be documented with the ISSO. Documentation must include the reason for the account, who has access to the account, and how the risk of using the shared account is mitigated to include monitoring account activity. If unapproved shared accounts exist, this is a finding.

Fix: F-5964r355016_fix

Remove unapproved shared accounts from the system. Document required shared accounts with the ISSO. Documentation must include the reason for the account, who has access to the account, and how the risk of using the shared account is mitigated to include monitoring account activity.

b
Windows Server 2019 accounts must require passwords.
IA-2 - Medium - CCI-000764 - V-205700 - SV-205700r857294_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000764
Version
WN19-00-000200
Vuln IDs
  • V-205700
  • V-93439
Rule IDs
  • SV-205700r857294_rule
  • SV-103525
The lack of password protection enables anyone to gain access to the information system, which opens a backdoor opportunity for intruders to compromise the system as well as other resources. Accounts on a system must require passwords.
Checks: C-5965r857293_chk

Review the password required status for enabled user accounts. Open "PowerShell". Domain Controllers: Enter "Get-Aduser -Filter * -Properties Passwordnotrequired |FT Name, Passwordnotrequired, Enabled". Exclude disabled accounts (e.g., DefaultAccount, Guest) and Trusted Domain Objects (TDOs). If "Passwordnotrequired" is "True" or blank for any enabled user account, this is a finding. Member servers and standalone or nondomain-joined systems: Enter 'Get-CimInstance -Class Win32_Useraccount -Filter "PasswordRequired=False and LocalAccount=True" | FT Name, PasswordRequired, Disabled, LocalAccount'. Exclude disabled accounts (e.g., DefaultAccount, Guest). If any enabled user accounts are returned with a "PasswordRequired" status of "False", this is a finding.

Fix: F-5965r355019_fix

Configure all enabled accounts to require passwords. The password required flag can be set by entering the following on a command line: "Net user [username] /passwordreq:yes", substituting [username] with the name of the user account.

b
Windows Server 2019 Active Directory user accounts, including administrators, must be configured to require the use of a Common Access Card (CAC), Personal Identity Verification (PIV)-compliant hardware token, or Alternate Logon Token (ALT) for user authentication.
IA-2 - Medium - CCI-000765 - V-205701 - SV-205701r860029_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-000765
Version
WN19-DC-000310
Vuln IDs
  • V-205701
  • V-93441
Rule IDs
  • SV-205701r860029_rule
  • SV-103527
Smart cards such as the CAC support a two-factor authentication technique. This provides a higher level of trust in the asserted identity than use of the username and password for authentication. Satisfies: SRG-OS-000105-GPOS-00052, SRG-OS-000106-GPOS-00053, SRG-OS-000107-GPOS-00054, SRG-OS-000108-GPOS-00055, SRG-OS-000375-GPOS-00160
Checks: C-5966r355021_chk

This applies to domain controllers. It is NA for other systems. Open "PowerShell". Enter the following: "Get-ADUser -Filter {(Enabled -eq $True) -and (SmartcardLogonRequired -eq $False)} | FT Name" ("DistinguishedName" may be substituted for "Name" for more detailed output.) If any user accounts, including administrators, are listed, this is a finding. Alternately: To view sample accounts in "Active Directory Users and Computers" (available from various menus or run "dsa.msc"): Select the Organizational Unit (OU) where the user accounts are located. (By default, this is the Users node; however, accounts may be under other organization-defined OUs.) Right-click the sample user account and select "Properties". Select the "Account" tab. If any user accounts, including administrators, do not have "Smart card is required for interactive logon" checked in the "Account Options" area, this is a finding.

Fix: F-5966r355022_fix

Configure all user accounts, including administrator accounts, in Active Directory to enable the option "Smart card is required for interactive logon". Run "Active Directory Users and Computers" (available from various menus or run "dsa.msc"): Select the OU where the user accounts are located. (By default this is the Users node; however, accounts may be under other organization-defined OUs.) Right-click the user account and select "Properties". Select the "Account" tab. Check "Smart card is required for interactive logon" in the "Account Options" area.

b
Windows Server 2019 Kerberos user logon restrictions must be enforced.
IA-2 - Medium - CCI-001941 - V-205702 - SV-205702r852424_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-001941
Version
WN19-DC-000020
Vuln IDs
  • V-205702
  • V-93443
Rule IDs
  • SV-205702r852424_rule
  • SV-103529
This policy setting determines whether the Kerberos Key Distribution Center (KDC) validates every request for a session ticket against the user rights policy of the target computer. The policy is enabled by default, which is the most secure setting for validating that access to target resources is not circumvented. Satisfies: SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058
Checks: C-5967r355024_chk

This applies to domain controllers. It is NA for other systems. Verify the following is configured in the Default Domain Policy: Open "Group Policy Management". Navigate to "Group Policy Objects" in the Domain being reviewed (Forest >> Domains >> Domain). Right-click on the "Default Domain Policy". Select "Edit". Navigate to Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy. If the "Enforce user logon restrictions" is not set to "Enabled", this is a finding.

Fix: F-5967r355025_fix

Configure the policy value in the Default Domain Policy for Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy >> "Enforce user logon restrictions" to "Enabled".

b
Windows Server 2019 Kerberos service ticket maximum lifetime must be limited to 600 minutes or less.
IA-2 - Medium - CCI-001941 - V-205703 - SV-205703r852425_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-001941
Version
WN19-DC-000030
Vuln IDs
  • V-205703
  • V-93445
Rule IDs
  • SV-205703r852425_rule
  • SV-103531
This setting determines the maximum amount of time (in minutes) that a granted session ticket can be used to access a particular service. Session tickets are used only to authenticate new connections with servers. Ongoing operations are not interrupted if the session ticket used to authenticate the connection expires during the connection. Satisfies: SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058
Checks: C-5968r355027_chk

This applies to domain controllers. It is NA for other systems. Verify the following is configured in the Default Domain Policy: Open "Group Policy Management". Navigate to "Group Policy Objects" in the Domain being reviewed (Forest >> Domains >> Domain). Right-click on the "Default Domain Policy". Select "Edit". Navigate to Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy. If the value for "Maximum lifetime for service ticket" is "0" or greater than "600" minutes, this is a finding.

Fix: F-5968r355028_fix

Configure the policy value in the Default Domain Policy for Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy >> "Maximum lifetime for service ticket" to a maximum of "600" minutes, but not "0", which equates to "Ticket doesn't expire".

b
Windows Server 2019 Kerberos user ticket lifetime must be limited to 10 hours or less.
IA-2 - Medium - CCI-001941 - V-205704 - SV-205704r852426_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-001941
Version
WN19-DC-000040
Vuln IDs
  • V-205704
  • V-93447
Rule IDs
  • SV-205704r852426_rule
  • SV-103533
In Kerberos, there are two types of tickets: Ticket Granting Tickets (TGTs) and Service Tickets. Kerberos tickets have a limited lifetime so the time an attacker has to implement an attack is limited. This policy controls how long TGTs can be renewed. With Kerberos, the user's initial authentication to the domain controller results in a TGT, which is then used to request Service Tickets to resources. Upon startup, each computer gets a TGT before requesting a service ticket to the domain controller and any other computers it needs to access. For services that start up under a specified user account, users must always get a TGT first and then get Service Tickets to all computers and services accessed. Satisfies: SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058
Checks: C-5969r355030_chk

This applies to domain controllers. It is NA for other systems. Verify the following is configured in the Default Domain Policy: Open "Group Policy Management". Navigate to "Group Policy Objects" in the Domain being reviewed (Forest >> Domains >> Domain). Right-click on the "Default Domain Policy". Select "Edit". Navigate to Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy. If the value for "Maximum lifetime for user ticket" is "0" or greater than "10" hours, this is a finding.

Fix: F-5969r355031_fix

Configure the policy value in the Default Domain Policy for Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy >> "Maximum lifetime for user ticket" to a maximum of "10" hours but not "0", which equates to "Ticket doesn't expire".

b
Windows Server 2019 Kerberos policy user ticket renewal maximum lifetime must be limited to seven days or less.
IA-2 - Medium - CCI-001941 - V-205705 - SV-205705r852427_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-001941
Version
WN19-DC-000050
Vuln IDs
  • V-205705
  • V-93449
Rule IDs
  • SV-205705r852427_rule
  • SV-103535
This setting determines the period of time (in days) during which a user's Ticket Granting Ticket (TGT) may be renewed. This security configuration limits the amount of time an attacker has to crack the TGT and gain access. Satisfies: SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058
Checks: C-5970r355033_chk

This applies to domain controllers. It is NA for other systems. Verify the following is configured in the Default Domain Policy: Open "Group Policy Management". Navigate to "Group Policy Objects" in the Domain being reviewed (Forest >> Domains >> Domain). Right-click on the "Default Domain Policy". Select "Edit". Navigate to Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy. If the "Maximum lifetime for user ticket renewal" is greater than "7" days, this is a finding.

Fix: F-5970r355034_fix

Configure the policy value in the Default Domain Policy for Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy >> "Maximum lifetime for user ticket renewal" to a maximum of "7" days or less.

b
Windows Server 2019 computer clock synchronization tolerance must be limited to five minutes or less.
IA-2 - Medium - CCI-001941 - V-205706 - SV-205706r852428_rule
RMF Control
IA-2
Severity
Medium
CCI
CCI-001941
Version
WN19-DC-000060
Vuln IDs
  • V-205706
  • V-93451
Rule IDs
  • SV-205706r852428_rule
  • SV-103537
This setting determines the maximum time difference (in minutes) that Kerberos will tolerate between the time on a client's clock and the time on a server's clock while still considering the two clocks synchronous. In order to prevent replay attacks, Kerberos uses timestamps as part of its protocol definition. For timestamps to work properly, the clocks of the client and the server need to be in sync as much as possible. Satisfies: SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058
Checks: C-5971r355036_chk

This applies to domain controllers. It is NA for other systems. Verify the following is configured in the Default Domain Policy: Open "Group Policy Management". Navigate to "Group Policy Objects" in the Domain being reviewed (Forest >> Domains >> Domain). Right-click on the "Default Domain Policy". Select "Edit". Navigate to Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy. If the "Maximum tolerance for computer clock synchronization" is greater than "5" minutes, this is a finding.

Fix: F-5971r355037_fix

Configure the policy value in the Default Domain Policy for Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy >> "Maximum tolerance for computer clock synchronization" to a maximum of "5" minutes or less.

b
Windows Server 2019 outdated or unused accounts must be removed or disabled.
IA-4 - Medium - CCI-000795 - V-205707 - SV-205707r857292_rule
RMF Control
IA-4
Severity
Medium
CCI
CCI-000795
Version
WN19-00-000190
Vuln IDs
  • V-205707
  • V-93457
Rule IDs
  • SV-205707r857292_rule
  • SV-103543
Outdated or unused accounts provide penetration points that may go undetected. Inactive accounts must be deleted if no longer necessary or, if still required, disabled until needed.
Checks: C-5972r857291_chk

Open "Windows PowerShell". Domain Controllers: Enter "Search-ADAccount -AccountInactive -UsersOnly -TimeSpan 35.00:00:00" This will return accounts that have not been logged on to for 35 days, along with various attributes such as the Enabled status and LastLogonDate. Member servers and standalone or nondomain-joined systems: Copy or enter the lines below to the PowerShell window and enter. (Entering twice may be required. Do not include the quotes at the beginning and end of the query.) "([ADSI]('WinNT://{0}' -f $env:COMPUTERNAME)).Children | Where { $_.SchemaClassName -eq 'user' } | ForEach { $user = ([ADSI]$_.Path) $lastLogin = $user.Properties.LastLogin.Value $enabled = ($user.Properties.UserFlags.Value -band 0x2) -ne 0x2 if ($lastLogin -eq $null) { $lastLogin = 'Never' } Write-Host $user.Name $lastLogin $enabled }" This will return a list of local accounts with the account name, last logon, and if the account is enabled (True/False). For example: User1 10/31/2015 5:49:56 AM True Review the list of accounts returned by the above queries to determine the finding validity for each account reported. Exclude the following accounts: - Built-in administrator account (Renamed, SID ending in 500) - Built-in guest account (Renamed, Disabled, SID ending in 501) - Application accounts If any enabled accounts have not been logged on to within the past 35 days, this is a finding. Inactive accounts that have been reviewed and deemed to be required must be documented with the ISSO.

Fix: F-5972r355040_fix

Regularly review accounts to determine if they are still active. Remove or disable accounts that have not been used in the last 35 days.

b
Windows Server 2019 Kerberos encryption types must be configured to prevent the use of DES and RC4 encryption suites.
IA-7 - Medium - CCI-000803 - V-205708 - SV-205708r569188_rule
RMF Control
IA-7
Severity
Medium
CCI
CCI-000803
Version
WN19-SO-000290
Vuln IDs
  • V-205708
  • V-93495
Rule IDs
  • SV-205708r569188_rule
  • SV-103581
Certain encryption types are no longer considered secure. The DES and RC4 encryption suites must not be used for Kerberos encryption. Note: Organizations with domain controllers running earlier versions of Windows where RC4 encryption is enabled, selecting "The other domain supports Kerberos AES Encryption" on domain trusts, may be required to allow client communication across the trust relationship.
Checks: C-5973r355042_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\Kerberos\Parameters\ Value Name: SupportedEncryptionTypes Value Type: REG_DWORD Value: 0x7ffffff8 (2147483640)

Fix: F-5973r355043_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: Configure encryption types allowed for Kerberos" to "Enabled" with only the following selected: AES128_HMAC_SHA1 AES256_HMAC_SHA1 Future encryption types Note: Organizations with domain controllers running earlier versions of Windows where RC4 encryption is enabled, selecting "The other domain supports Kerberos AES Encryption" on domain trusts, may be required to allow client communication across the trust relationship.

b
Windows Server 2019 must have the built-in guest account disabled.
IA-8 - Medium - CCI-000804 - V-205709 - SV-205709r569188_rule
RMF Control
IA-8
Severity
Medium
CCI
CCI-000804
Version
WN19-SO-000010
Vuln IDs
  • V-205709
  • V-93497
Rule IDs
  • SV-205709r569188_rule
  • SV-103583
A system faces an increased vulnerability threat if the built-in guest account is not disabled. This is a known account that exists on all Windows systems and cannot be deleted. This account is initialized during the installation of the operating system with no password assigned.
Checks: C-5974r355045_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options. If the value for "Accounts: Guest account status" is not set to "Disabled", this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "EnableGuestAccount" equals "1" in the file, this is a finding.

Fix: F-5974r355046_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Accounts: Guest account status" to "Disabled".

b
Windows Server 2019 must automatically remove or disable emergency accounts after the crisis is resolved or within 72 hours.
AC-2 - Medium - CCI-001682 - V-205710 - SV-205710r857303_rule
RMF Control
AC-2
Severity
Medium
CCI
CCI-001682
Version
WN19-00-000310
Vuln IDs
  • V-205710
  • V-92977
Rule IDs
  • SV-205710r857303_rule
  • SV-103065
Emergency administrator accounts are privileged accounts established in response to crisis situations where the need for rapid account activation is required. Therefore, emergency account activation may bypass normal account authorization processes. If these accounts are automatically disabled, system maintenance during emergencies may not be possible, thus adversely affecting system availability. Emergency administrator accounts are different from infrequently used accounts (i.e., local logon accounts used by system administrators when network or normal logon/access is not available). Infrequently used accounts are not subject to automatic termination dates. Emergency accounts are accounts created in response to crisis situations, usually for use by maintenance personnel. The automatic expiration or disabling time period may be extended as needed until the crisis is resolved; however, it must not be extended indefinitely. A permanent account should be established for privileged users who need long-term maintenance accounts. To address access requirements, many operating systems can be integrated with enterprise-level authentication/access mechanisms that meet or exceed access control policy requirements.
Checks: C-5975r857302_chk

Determine if emergency administrator accounts are used and identify any that exist. If none exist, this is NA. If emergency administrator accounts cannot be configured with an expiration date due to an ongoing crisis, the accounts must be disabled or removed when the crisis is resolved. If emergency administrator accounts have not been configured with an expiration date or have not been disabled or removed following the resolution of a crisis, this is a finding. Domain Controllers: Open "PowerShell". Enter "Search-ADAccount -AccountExpiring | FT Name, AccountExpirationDate". If "AccountExpirationDate" has been defined and is not within 72 hours for an emergency administrator account, this is a finding. Member servers and standalone or nondomain-joined systems: Open "Command Prompt". Run "Net user [username]", where [username] is the name of the emergency account. If "Account expires" has been defined and is not within 72 hours for an emergency administrator account, this is a finding.

Fix: F-5975r355049_fix

Remove emergency administrator accounts after a crisis has been resolved or configure the accounts to automatically expire within 72 hours. Domain accounts can be configured with an account expiration date, under "Account" properties. Local accounts can be configured to expire with the command "Net user [username] /expires:[mm/dd/yyyy]", where username is the name of the temporary user account.

c
Windows Server 2019 Windows Remote Management (WinRM) client must not use Basic authentication.
MA-4 - High - CCI-000877 - V-205711 - SV-205711r877395_rule
RMF Control
MA-4
Severity
High
CCI
CCI-000877
Version
WN19-CC-000470
Vuln IDs
  • V-205711
  • V-93503
Rule IDs
  • SV-205711r877395_rule
  • SV-103589
Basic authentication uses plain-text passwords that could be used to compromise a system. Disabling Basic authentication will reduce this potential.
Checks: C-5976r355051_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\WinRM\Client\ Value Name: AllowBasic Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-5976r355052_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Remote Management (WinRM) >> WinRM Client >> "Allow Basic authentication" to "Disabled".

b
Windows Server 2019 Windows Remote Management (WinRM) client must not use Digest authentication.
MA-4 - Medium - CCI-000877 - V-205712 - SV-205712r877395_rule
RMF Control
MA-4
Severity
Medium
CCI
CCI-000877
Version
WN19-CC-000490
Vuln IDs
  • V-205712
  • V-93505
Rule IDs
  • SV-205712r877395_rule
  • SV-103591
Digest authentication is not as strong as other options and may be subject to man-in-the-middle attacks. Disallowing Digest authentication will reduce this potential.
Checks: C-5977r355054_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\WinRM\Client\ Value Name: AllowDigest Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-5977r355055_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Remote Management (WinRM) >> WinRM Client >> "Disallow Digest authentication" to "Enabled".

c
Windows Server 2019 Windows Remote Management (WinRM) service must not use Basic authentication.
MA-4 - High - CCI-000877 - V-205713 - SV-205713r877395_rule
RMF Control
MA-4
Severity
High
CCI
CCI-000877
Version
WN19-CC-000500
Vuln IDs
  • V-205713
  • V-93507
Rule IDs
  • SV-205713r877395_rule
  • SV-103593
Basic authentication uses plain-text passwords that could be used to compromise a system. Disabling Basic authentication will reduce this potential.
Checks: C-5978r355057_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\WinRM\Service\ Value Name: AllowBasic Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-5978r355058_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Remote Management (WinRM) >> WinRM Service >> "Allow Basic authentication" to "Disabled".

b
Windows Server 2019 administrator accounts must not be enumerated during elevation.
SC-3 - Medium - CCI-001084 - V-205714 - SV-205714r569188_rule
RMF Control
SC-3
Severity
Medium
CCI
CCI-001084
Version
WN19-CC-000240
Vuln IDs
  • V-205714
  • V-93517
Rule IDs
  • SV-205714r569188_rule
  • SV-103603
Enumeration of administrator accounts when elevating can provide part of the logon information to an unauthorized user. This setting configures the system to always require users to type in a username and password to elevate a running application.
Checks: C-5979r355060_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\CredUI\ Value Name: EnumerateAdministrators Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-5979r355061_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Credential User Interface >> "Enumerate administrator accounts on elevation" to "Disabled".

b
Windows Server 2019 local administrator accounts must have their privileged token filtered to prevent elevated privileges from being used over the network on domain-joined member servers.
SC-3 - Medium - CCI-001084 - V-205715 - SV-205715r857320_rule
RMF Control
SC-3
Severity
Medium
CCI
CCI-001084
Version
WN19-MS-000020
Vuln IDs
  • V-205715
  • V-93519
Rule IDs
  • SV-205715r857320_rule
  • SV-103605
A compromised local administrator account can provide means for an attacker to move laterally between domain systems. With User Account Control enabled, filtering the privileged token for local administrator accounts will prevent the elevated privileges of these accounts from being used over the network.
Checks: C-5980r857318_chk

This applies to member servers. For domain controllers and standalone or nondomain-joined systems, this is NA. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System Value Name: LocalAccountTokenFilterPolicy Type: REG_DWORD Value: 0x00000000 (0) This setting may cause issues with some network scanning tools if local administrative accounts are used remotely. Scans should use domain accounts where possible. If a local administrative account must be used, temporarily enabling the privileged token by configuring the registry value to "1" may be required.

Fix: F-5980r857319_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> MS Security Guide >> "Apply UAC restrictions to local accounts on network logons" to "Enabled". This policy setting requires the installation of the SecGuide custom templates included with the STIG package. "SecGuide.admx" and "SecGuide.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.

b
Windows Server 2019 UIAccess applications must not be allowed to prompt for elevation without using the secure desktop.
SC-3 - Medium - CCI-001084 - V-205716 - SV-205716r569188_rule
RMF Control
SC-3
Severity
Medium
CCI
CCI-001084
Version
WN19-SO-000390
Vuln IDs
  • V-205716
  • V-93521
Rule IDs
  • SV-205716r569188_rule
  • SV-103607
User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting prevents User Interface Accessibility programs from disabling the secure desktop for elevation prompts.
Checks: C-5981r355066_chk

UAC requirements are NA for Server Core installations (this is the default installation option for Windows Server 2019 versus Server with Desktop Experience). If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: EnableUIADesktopToggle Value Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-5981r355067_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "User Account Control: Allow UIAccess applications to prompt for elevation without using the secure desktop" to "Disabled".

b
Windows Server 2019 User Account Control must, at a minimum, prompt administrators for consent on the secure desktop.
SC-3 - Medium - CCI-001084 - V-205717 - SV-205717r569188_rule
RMF Control
SC-3
Severity
Medium
CCI
CCI-001084
Version
WN19-SO-000400
Vuln IDs
  • V-205717
  • V-93523
Rule IDs
  • SV-205717r569188_rule
  • SV-103609
User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting configures the elevation requirements for logged-on administrators to complete a task that requires raised privileges.
Checks: C-5982r355069_chk

UAC requirements are NA for Server Core installations (this is default installation option for Windows Server 2019 versus Server with Desktop Experience). If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: ConsentPromptBehaviorAdmin Value Type: REG_DWORD Value: 0x00000002 (2) (Prompt for consent on the secure desktop) 0x00000001 (1) (Prompt for credentials on the secure desktop)

Fix: F-5982r355070_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "User Account Control: Behavior of the elevation prompt for administrators in Admin Approval Mode" to "Prompt for consent on the secure desktop". The more secure option for this setting, "Prompt for credentials on the secure desktop", would also be acceptable.

b
Windows Server 2019 User Account Control must be configured to detect application installations and prompt for elevation.
SC-3 - Medium - CCI-001084 - V-205718 - SV-205718r569188_rule
RMF Control
SC-3
Severity
Medium
CCI
CCI-001084
Version
WN19-SO-000420
Vuln IDs
  • V-205718
  • V-93525
Rule IDs
  • SV-205718r569188_rule
  • SV-103611
User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting requires Windows to respond to application installation requests by prompting for credentials.
Checks: C-5983r355072_chk

UAC requirements are NA for Server Core installations (this is the default installation option for Windows Server 2019 versus Server with Desktop Experience). If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: EnableInstallerDetection Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5983r355073_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "User Account Control: Detect application installations and prompt for elevation" to "Enabled".

b
Windows Server 2019 User Account Control (UAC) must only elevate UIAccess applications that are installed in secure locations.
SC-3 - Medium - CCI-001084 - V-205719 - SV-205719r569188_rule
RMF Control
SC-3
Severity
Medium
CCI
CCI-001084
Version
WN19-SO-000430
Vuln IDs
  • V-205719
  • V-93527
Rule IDs
  • SV-205719r569188_rule
  • SV-103613
UAC is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting configures Windows to only allow applications installed in a secure location on the file system, such as the Program Files or the Windows\System32 folders, to run with elevated privileges.
Checks: C-5984r355075_chk

UAC requirements are NA for Server Core installations (this is the default installation option for Windows Server 2019 versus Server with Desktop Experience). If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: EnableSecureUIAPaths Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5984r355076_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "User Account Control: Only elevate UIAccess applications that are installed in secure locations" to "Enabled".

b
Windows Server 2019 User Account Control (UAC) must virtualize file and registry write failures to per-user locations.
SC-3 - Medium - CCI-001084 - V-205720 - SV-205720r569188_rule
RMF Control
SC-3
Severity
Medium
CCI
CCI-001084
Version
WN19-SO-000450
Vuln IDs
  • V-205720
  • V-93529
Rule IDs
  • SV-205720r569188_rule
  • SV-103615
UAC is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting configures non-UAC-compliant applications to run in virtualized file and registry entries in per-user locations, allowing them to run.
Checks: C-5985r355078_chk

UAC requirements are NA for Server Core installations (this is the default installation option for Windows Server 2019 versus Server with Desktop Experience). If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: EnableVirtualization Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5985r355079_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "User Account Control: Virtualize file and registry write failures to per-user locations" to "Enabled".

b
Windows Server 2019 non-system-created file shares must limit access to groups that require it.
SC-4 - Medium - CCI-001090 - V-205721 - SV-205721r569188_rule
RMF Control
SC-4
Severity
Medium
CCI
CCI-001090
Version
WN19-00-000230
Vuln IDs
  • V-205721
  • V-93531
Rule IDs
  • SV-205721r569188_rule
  • SV-103617
Shares on a system provide network access. To prevent exposing sensitive information, where shares are necessary, permissions must be reconfigured to give the minimum access to accounts that require it.
Checks: C-5986r355081_chk

If only system-created shares such as "ADMIN$", "C$", and "IPC$" exist on the system, this is NA. (System-created shares will display a message that it has been shared for administrative purposes when "Properties" is selected.) Run "Computer Management". Navigate to System Tools >> Shared Folders >> Shares. Right-click any non-system-created shares. Select "Properties". Select the "Share Permissions" tab. If the file shares have not been configured to restrict permissions to the specific groups or accounts that require access, this is a finding. Select the "Security" tab. If the permissions have not been configured to restrict permissions to the specific groups or accounts that require access, this is a finding.

Fix: F-5986r355082_fix

If a non-system-created share is required on a system, configure the share and NTFS permissions to limit access to the specific groups or accounts that require it. Remove any unnecessary non-system-created shares.

b
Windows Server 2019 Remote Desktop Services must prevent drive redirection.
SC-4 - Medium - CCI-001090 - V-205722 - SV-205722r569188_rule
RMF Control
SC-4
Severity
Medium
CCI
CCI-001090
Version
WN19-CC-000350
Vuln IDs
  • V-205722
  • V-93533
Rule IDs
  • SV-205722r569188_rule
  • SV-103619
Preventing users from sharing the local drives on their client computers with Remote Session Hosts that they access helps reduce possible exposure of sensitive data.
Checks: C-5987r355084_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\ Value Name: fDisableCdm Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5987r355085_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Remote Desktop Services >> Remote Desktop Session Host >> Device and Resource Redirection >> "Do not allow drive redirection" to "Enabled".

b
Windows Server 2019 data files owned by users must be on a different logical partition from the directory server data files.
SC-4 - Medium - CCI-001090 - V-205723 - SV-205723r569188_rule
RMF Control
SC-4
Severity
Medium
CCI
CCI-001090
Version
WN19-DC-000120
Vuln IDs
  • V-205723
  • V-93535
Rule IDs
  • SV-205723r569188_rule
  • SV-103621
When directory service data files, especially for directories used for identification, authentication, or authorization, reside on the same logical partition as user-owned files, the directory service data may be more vulnerable to unauthorized access or other availability compromises. Directory service and user-owned data files sharing a partition may be configured with less restrictive permissions in order to allow access to the user data. The directory service may be vulnerable to a denial of service attack when user-owned files on a common partition are expanded to an extent preventing the directory service from acquiring more space for directory or audit data.
Checks: C-5988r355087_chk

This applies to domain controllers. It is NA for other systems. Run "Regedit". Navigate to "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NTDS\Parameters". Note the directory locations in the values for "DSA Database file". Open "Command Prompt". Enter "net share". Note the logical drive(s) or file system partition for any organization-created data shares. Ignore system shares (e.g., NETLOGON, SYSVOL, and administrative shares ending in $). User shares that are hidden (ending with $) should not be ignored. If user shares are located on the same logical partition as the directory server data files, this is a finding.

Fix: F-5988r355088_fix

Move shares used to store files owned by users to a different logical partition than the directory server data files.

c
Windows Server 2019 must not allow anonymous enumeration of shares.
SC-4 - High - CCI-001090 - V-205724 - SV-205724r569188_rule
RMF Control
SC-4
Severity
High
CCI
CCI-001090
Version
WN19-SO-000230
Vuln IDs
  • V-205724
  • V-93537
Rule IDs
  • SV-205724r569188_rule
  • SV-103623
Allowing anonymous logon users (null session connections) to list all account names and enumerate all shared resources can provide a map of potential points to attack the system.
Checks: C-5989r355090_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\ Value Name: RestrictAnonymous Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5989r355091_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Do not allow anonymous enumeration of SAM accounts and shares" to "Enabled".

c
Windows Server 2019 must restrict anonymous access to Named Pipes and Shares.
SC-4 - High - CCI-001090 - V-205725 - SV-205725r569188_rule
RMF Control
SC-4
Severity
High
CCI
CCI-001090
Version
WN19-SO-000250
Vuln IDs
  • V-205725
  • V-93539
Rule IDs
  • SV-205725r569188_rule
  • SV-103625
Allowing anonymous access to named pipes or shares provides the potential for unauthorized system access. This setting restricts access to those defined in "Network access: Named Pipes that can be accessed anonymously" and "Network access: Shares that can be accessed anonymously", both of which must be blank under other requirements.
Checks: C-5990r355093_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\LanManServer\Parameters\ Value Name: RestrictNullSessAccess Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-5990r355094_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Restrict anonymous access to Named Pipes and Shares" to "Enabled".

a
Windows Server 2019 directory service must be configured to terminate LDAP-based network connections to the directory server after five minutes of inactivity.
SC-10 - Low - CCI-001133 - V-205726 - SV-205726r569188_rule
RMF Control
SC-10
Severity
Low
CCI
CCI-001133
Version
WN19-DC-000160
Vuln IDs
  • V-205726
  • V-93509
Rule IDs
  • SV-205726r569188_rule
  • SV-103595
The failure to terminate inactive network connections increases the risk of a successful attack on the directory server. The longer an established session is in progress, the more time an attacker has to hijack the session, implement a means to passively intercept data, or compromise any protections on client access. For example, if an attacker gains control of a client computer, an existing (already authenticated) session with the directory server could allow access to the directory. The lack of confidentiality protection in LDAP-based sessions increases exposure to this vulnerability.
Checks: C-5991r355096_chk

This applies to domain controllers. It is NA for other systems. Open an elevated "Command Prompt" (run as administrator). Enter "ntdsutil". At the "ntdsutil:" prompt, enter "LDAP policies". At the "ldap policy:" prompt, enter "connections". At the "server connections:" prompt, enter "connect to server [host-name]" (where [host-name] is the computer name of the domain controller). At the "server connections:" prompt, enter "q". At the "ldap policy:" prompt, enter "show values". If the value for MaxConnIdleTime is greater than "300" (5 minutes) or is not specified, this is a finding. Enter "q" at the "ldap policy:" and "ntdsutil:" prompts to exit. Alternately, Dsquery can be used to display MaxConnIdleTime: Open "Command Prompt (Admin)". Enter the following command (on a single line). dsquery * "cn=Default Query Policy,cn=Query-Policies,cn=Directory Service, cn=Windows NT,cn=Services,cn=Configuration,dc=[forest-name]" -attr LDAPAdminLimits The quotes are required and dc=[forest-name] is the fully qualified LDAP name of the domain being reviewed (e.g., dc=disaost,dc=mil). If the results do not specify a "MaxConnIdleTime" or it has a value greater than "300" (5 minutes), this is a finding.

Fix: F-5991r355097_fix

Configure the directory service to terminate LDAP-based network connections to the directory server after 5 minutes of inactivity. Open an elevated "Command prompt" (run as administrator). Enter "ntdsutil". At the "ntdsutil:" prompt, enter "LDAP policies". At the "ldap policy:" prompt, enter "connections". At the "server connections:" prompt, enter "connect to server [host-name]" (where [host-name] is the computer name of the domain controller). At the "server connections:" prompt, enter "q". At the "ldap policy:" prompt, enter "Set MaxConnIdleTime to 300". Enter "Commit Changes" to save. Enter "Show values" to verify changes. Enter "q" at the "ldap policy:" and "ntdsutil:" prompts to exit.

b
Windows Server 2019 systems requiring data at rest protections must employ cryptographic mechanisms to prevent unauthorized disclosure and modification of the information at rest.
SC-28 - Medium - CCI-001199 - V-205727 - SV-205727r852429_rule
RMF Control
SC-28
Severity
Medium
CCI
CCI-001199
Version
WN19-00-000250
Vuln IDs
  • V-205727
  • V-93515
Rule IDs
  • SV-205727r852429_rule
  • SV-103601
This requirement addresses protection of user-generated data as well as operating system-specific configuration data. Organizations may choose to employ different mechanisms to achieve confidentiality and integrity protections, as appropriate, in accordance with the security category and/or classification of the information. Selection of a cryptographic mechanism is based on the need to protect the integrity of organizational information. The strength of the mechanism is commensurate with the security category and/or classification of the information. Organizations have the flexibility to either encrypt all information on storage devices (i.e., full disk encryption) or encrypt specific data structures (e.g., files, records, or fields). Satisfies: SRG-OS-000185-GPOS-00079, SRG-OS-000404-GPOS-00183, SRG-OS-000405-GPOS-00184
Checks: C-5992r355099_chk

Verify systems that require additional protections due to factors such as inadequate physical protection or sensitivity of the data employ encryption to protect the confidentiality and integrity of all information at rest. If they do not, this is a finding.

Fix: F-5992r355100_fix

Configure systems that require additional protections due to factors such as inadequate physical protection or sensitivity of the data to employ encryption to protect the confidentiality and integrity of all information at rest.

b
Windows Server 2019 must employ automated mechanisms to determine the state of system components with regard to flaw remediation using the following frequency: continuously, where Endpoint Security Solution (ESS) is used; 30 days, for any additional internal network scans not covered by ESS; and annually, for external scans by Computer Network Defense Service Provider (CNDSP).
SI-2 - Medium - CCI-001233 - V-205728 - SV-205728r793217_rule
RMF Control
SI-2
Severity
Medium
CCI
CCI-001233
Version
WN19-00-000290
Vuln IDs
  • V-205728
  • V-93567
Rule IDs
  • SV-205728r793217_rule
  • SV-103653
Without the use of automated mechanisms to scan for security flaws on a continuous and/or periodic basis, the operating system or other system components may remain vulnerable to the exploits presented by undetected software flaws. The operating system may have an integrated solution incorporating continuous scanning using ESS and periodic scanning using other tools.
Checks: C-5993r641886_chk

Verify DoD-approved ESS software is installed and properly operating. Ask the site ISSM for documentation of the ESS software installation and configuration. If the ISSM is not able to provide a documented configuration for an installed ESS or if the ESS software is not properly maintained or used, this is a finding. Note: Example of documentation can be a copy of the site's CCB approved Software Baseline with version of software noted or a memo from the ISSM stating current ESS software and version.

Fix: F-5993r641887_fix

Install a DoD-approved ESS software and ensure it is operating continuously.

b
Windows Server 2019 must be configured to audit Logon/Logoff - Account Lockout failures.
AU-12 - Medium - CCI-000172 - V-205730 - SV-205730r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000160
Vuln IDs
  • V-205730
  • V-92989
Rule IDs
  • SV-205730r569188_rule
  • SV-103077
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Account Lockout events can be used to identify potentially malicious logon attempts. Satisfies: SRG-OS-000240-GPOS-00090, SRG-OS-000470-GPOS-00214
Checks: C-5995r355108_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Logon/Logoff >> Account Lockout - Failure

Fix: F-5995r355109_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Logon/Logoff >> "Audit Account Lockout" with "Failure" selected.

b
Windows Server 2019 Event Viewer must be protected from unauthorized modification and deletion.
AU-9 - Medium - CCI-001494 - V-205731 - SV-205731r569188_rule
RMF Control
AU-9
Severity
Medium
CCI
CCI-001494
Version
WN19-AU-000060
Vuln IDs
  • V-205731
  • V-93195
Rule IDs
  • SV-205731r569188_rule
  • SV-103283
Protecting audit information also includes identifying and protecting the tools used to view and manipulate log data. Therefore, protecting audit tools is necessary to prevent unauthorized operation on audit information. Operating systems providing tools to interface with audit information will leverage user permissions and roles identifying the user accessing the tools and the corresponding rights the user enjoys in order to make access decisions regarding the modification or deletion of audit tools. Satisfies: SRG-OS-000257-GPOS-00098, SRG-OS-000258-GPOS-00099
Checks: C-5996r355111_chk

Navigate to "%SystemRoot%\System32". View the permissions on "Eventvwr.exe". If any groups or accounts other than TrustedInstaller have "Full control" or "Modify" permissions, this is a finding. The default permissions below satisfy this requirement: TrustedInstaller - Full Control Administrators, SYSTEM, Users, ALL APPLICATION PACKAGES, ALL RESTRICTED APPLICATION PACKAGES - Read & Execute

Fix: F-5996r355112_fix

Configure the permissions on the "Eventvwr.exe" file to prevent modification by any groups or accounts other than TrustedInstaller. The default permissions listed below satisfy this requirement: TrustedInstaller - Full Control Administrators, SYSTEM, Users, ALL APPLICATION PACKAGES, ALL RESTRICTED APPLICATION PACKAGES - Read & Execute The default location is the "%SystemRoot%\System32" folder.

b
Windows Server 2019 Deny log on through Remote Desktop Services user right on domain controllers must be configured to prevent unauthenticated access.
AC-17 - Medium - CCI-002314 - V-205732 - SV-205732r852430_rule
RMF Control
AC-17
Severity
Medium
CCI
CCI-002314
Version
WN19-DC-000410
Vuln IDs
  • V-205732
  • V-92963
Rule IDs
  • SV-205732r852430_rule
  • SV-103051
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny log on through Remote Desktop Services" user right defines the accounts that are prevented from logging on using Remote Desktop Services. The Guests group must be assigned this right to prevent unauthenticated access.
Checks: C-5997r355114_chk

This applies to domain controllers. A separate version applies to other systems. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If the following accounts or groups are not defined for the "Deny log on through Remote Desktop Services" user right, this is a finding: - Guests Group For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If the following SID(s) are not defined for the "SeDenyRemoteInteractiveLogonRight" user right, this is a finding. S-1-5-32-546 (Guests)

Fix: F-5997r355115_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny log on through Remote Desktop Services" to include the following: - Guests Group

b
Windows Server 2019 "Deny log on through Remote Desktop Services" user right on domain-joined member servers must be configured to prevent access from highly privileged domain accounts and all local accounts and from unauthenticated access on all systems.
AC-17 - Medium - CCI-002314 - V-205733 - SV-205733r860033_rule
RMF Control
AC-17
Severity
Medium
CCI
CCI-002314
Version
WN19-MS-000120
Vuln IDs
  • V-205733
  • V-92965
Rule IDs
  • SV-205733r860033_rule
  • SV-103053
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Deny log on through Remote Desktop Services" user right defines the accounts that are prevented from logging on using Remote Desktop Services. In an Active Directory Domain, denying logons to the Enterprise Admins and Domain Admins groups on lower-trust systems helps mitigate the risk of privilege escalation from credential theft attacks, which could lead to the compromise of an entire domain. Local accounts on domain-joined systems must also be assigned this right to decrease the risk of lateral movement resulting from credential theft attacks. The Guests group must be assigned this right to prevent unauthenticated access.
Checks: C-5998r857338_chk

This applies to member servers and standalone or nondomain-joined systems. A separate version applies to domain controllers. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If the following accounts or groups are not defined for the "Deny log on through Remote Desktop Services" user right, this is a finding: Domain Systems Only: - Enterprise Admins group - Domain Admins group - Local account (see Note below) All Systems: - Guests group For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If the following SIDs are not defined for the "SeDenyRemoteInteractiveLogonRight" user right, this is a finding. Domain Systems Only: S-1-5-root domain-519 (Enterprise Admins) S-1-5-domain-512 (Domain Admins) S-1-5-113 ("Local account") All Systems: S-1-5-32-546 (Guests) Note: "Local account" is referring to the Windows built-in security group.

Fix: F-5998r355118_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Deny log on through Remote Desktop Services" to include the following: Domain Systems Only: - Enterprise Admins group - Domain Admins group - Local account (see Note below) All Systems: - Guests group Note: "Local account" is referring to the Windows built-in security group.

b
Windows Server 2019 permissions for the system drive root directory (usually C:\) must conform to minimum requirements.
AC-3 - Medium - CCI-002165 - V-205734 - SV-205734r852432_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-002165
Version
WN19-00-000140
Vuln IDs
  • V-205734
  • V-93019
Rule IDs
  • SV-205734r852432_rule
  • SV-103107
Changing the system's file and directory permissions allows the possibility of unauthorized and anonymous modification to the operating system and installed applications. The default permissions are adequate when the Security Option "Network access: Let Everyone permissions apply to anonymous users" is set to "Disabled" (WN19-SO-000240). Satisfies: SRG-OS-000312-GPOS-00122, SRG-OS-000312-GPOS-00123, SRG-OS-000312-GPOS-00124
Checks: C-5999r355120_chk

The default permissions are adequate when the Security Option "Network access: Let Everyone permissions apply to anonymous users" is set to "Disabled" (WN19-SO-000240). Review the permissions for the system drive's root directory (usually C:\). Non-privileged groups such as Users or Authenticated Users must not have greater than "Read & execute" permissions except where noted as defaults. Individual accounts must not be used to assign permissions. If permissions are not as restrictive as the default permissions listed below, this is a finding. Viewing in File Explorer: View the Properties of the system drive's root directory. Select the "Security" tab, and the "Advanced" button. Default permissions: C:\ Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to SYSTEM - Full control - This folder, subfolders, and files Administrators - Full control - This folder, subfolders, and files Users - Read & execute - This folder, subfolders, and files Users - Create folders/append data - This folder and subfolders Users - Create files/write data - Subfolders only CREATOR OWNER - Full Control - Subfolders and files only Alternately, use icacls: Open "Command Prompt (Admin)". Enter "icacls" followed by the directory: "icacls c:\" The following results should be displayed: c:\ NT AUTHORITY\SYSTEM:(OI)(CI)(F) BUILTIN\Administrators:(OI)(CI)(F) BUILTIN\Users:(OI)(CI)(RX) BUILTIN\Users:(CI)(AD) BUILTIN\Users:(CI)(IO)(WD) CREATOR OWNER:(OI)(CI)(IO)(F) Successfully processed 1 files; Failed processing 0 files

Fix: F-5999r355121_fix

Maintain the default permissions for the system drive's root directory and configure the Security Option "Network access: Let Everyone permissions apply to anonymous users" to "Disabled" (WN19-SO-000240). Default Permissions C:\ Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to SYSTEM - Full control - This folder, subfolders, and files Administrators - Full control - This folder, subfolders, and files Users - Read & execute - This folder, subfolders, and files Users - Create folders/append data - This folder and subfolders Users - Create files/write data - Subfolders only CREATOR OWNER - Full Control - Subfolders and files only

b
Windows Server 2019 permissions for program file directories must conform to minimum requirements.
AC-3 - Medium - CCI-002165 - V-205735 - SV-205735r852433_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-002165
Version
WN19-00-000150
Vuln IDs
  • V-205735
  • V-93021
Rule IDs
  • SV-205735r852433_rule
  • SV-103109
Changing the system's file and directory permissions allows the possibility of unauthorized and anonymous modification to the operating system and installed applications. The default permissions are adequate when the Security Option "Network access: Let Everyone permissions apply to anonymous users" is set to "Disabled" (WN19-SO-000240). Satisfies: SRG-OS-000312-GPOS-00122, SRG-OS-000312-GPOS-00123, SRG-OS-000312-GPOS-00124
Checks: C-6000r355123_chk

The default permissions are adequate when the Security Option "Network access: Let Everyone permissions apply to anonymous users" is set to "Disabled" (WN19-SO-000240). Review the permissions for the program file directories (Program Files and Program Files [x86]). Non-privileged groups such as Users or Authenticated Users must not have greater than "Read & execute" permissions. Individual accounts must not be used to assign permissions. If permissions are not as restrictive as the default permissions listed below, this is a finding. Viewing in File Explorer: For each folder, view the Properties. Select the "Security" tab, and the "Advanced" button. Default permissions: \Program Files and \Program Files (x86) Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to TrustedInstaller - Full control - This folder and subfolders SYSTEM - Modify - This folder only SYSTEM - Full control - Subfolders and files only Administrators - Modify - This folder only Administrators - Full control - Subfolders and files only Users - Read & execute - This folder, subfolders and files CREATOR OWNER - Full control - Subfolders and files only ALL APPLICATION PACKAGES - Read & execute - This folder, subfolders, and files ALL RESTRICTED APPLICATION PACKAGES - Read & execute - This folder, subfolders, and files Alternately, use icacls: Open a Command prompt (admin). Enter "icacls" followed by the directory: 'icacls "c:\program files"' 'icacls "c:\program files (x86)"' The following results should be displayed for each when entered: c:\program files (c:\program files (x86)) NT SERVICE\TrustedInstaller:(F) NT SERVICE\TrustedInstaller:(CI)(IO)(F) NT AUTHORITY\SYSTEM:(M) NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(F) BUILTIN\Administrators:(M) BUILTIN\Administrators:(OI)(CI)(IO)(F) BUILTIN\Users:(RX) BUILTIN\Users:(OI)(CI)(IO)(GR,GE) CREATOR OWNER:(OI)(CI)(IO)(F) APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(RX) APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(OI)(CI)(IO)(GR,GE) APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(RX) APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(OI)(CI)(IO)(GR,GE) Successfully processed 1 files; Failed processing 0 files

Fix: F-6000r355124_fix

Maintain the default permissions for the program file directories and configure the Security Option "Network access: Let Everyone permissions apply to anonymous users" to "Disabled" (WN19-SO-000240). Default permissions: \Program Files and \Program Files (x86) Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to TrustedInstaller - Full control - This folder and subfolders SYSTEM - Modify - This folder only SYSTEM - Full control - Subfolders and files only Administrators - Modify - This folder only Administrators - Full control - Subfolders and files only Users - Read & execute - This folder, subfolders, and files CREATOR OWNER - Full control - Subfolders and files only ALL APPLICATION PACKAGES - Read & execute - This folder, subfolders, and files ALL RESTRICTED APPLICATION PACKAGES - Read & execute - This folder, subfolders, and files

b
Windows Server 2019 permissions for the Windows installation directory must conform to minimum requirements.
AC-3 - Medium - CCI-002165 - V-205736 - SV-205736r852434_rule
RMF Control
AC-3
Severity
Medium
CCI
CCI-002165
Version
WN19-00-000160
Vuln IDs
  • V-205736
  • V-93023
Rule IDs
  • SV-205736r852434_rule
  • SV-103111
Changing the system's file and directory permissions allows the possibility of unauthorized and anonymous modification to the operating system and installed applications. The default permissions are adequate when the Security Option "Network access: Let Everyone permissions apply to anonymous users" is set to "Disabled" (WN19-SO-000240). Satisfies: SRG-OS-000312-GPOS-00122, SRG-OS-000312-GPOS-00123, SRG-OS-000312-GPOS-00124
Checks: C-6001r355126_chk

The default permissions are adequate when the Security Option "Network access: Let Everyone permissions apply to anonymous users" is set to "Disabled" (WN19-SO-000240). Review the permissions for the Windows installation directory (usually C:\Windows). Non-privileged groups such as Users or Authenticated Users must not have greater than "Read & execute" permissions. Individual accounts must not be used to assign permissions. If permissions are not as restrictive as the default permissions listed below, this is a finding: Viewing in File Explorer: For each folder, view the Properties. Select the "Security" tab and the "Advanced" button. Default permissions: \Windows Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to TrustedInstaller - Full control - This folder and subfolders SYSTEM - Modify - This folder only SYSTEM - Full control - Subfolders and files only Administrators - Modify - This folder only Administrators - Full control - Subfolders and files only Users - Read & execute - This folder, subfolders, and files CREATOR OWNER - Full control - Subfolders and files only ALL APPLICATION PACKAGES - Read & execute - This folder, subfolders, and files ALL RESTRICTED APPLICATION PACKAGES - Read & execute - This folder, subfolders, and files Alternately, use icacls: Open a Command prompt (admin). Enter "icacls" followed by the directory: "icacls c:\windows" The following results should be displayed for each when entered: c:\windows NT SERVICE\TrustedInstaller:(F) NT SERVICE\TrustedInstaller:(CI)(IO)(F) NT AUTHORITY\SYSTEM:(M) NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(F) BUILTIN\Administrators:(M) BUILTIN\Administrators:(OI)(CI)(IO)(F) BUILTIN\Users:(RX) BUILTIN\Users:(OI)(CI)(IO)(GR,GE) CREATOR OWNER:(OI)(CI)(IO)(F) APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(RX) APPLICATION PACKAGE AUTHORITY\ALL APPLICATION PACKAGES:(OI)(CI)(IO)(GR,GE) APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(RX) APPLICATION PACKAGE AUTHORITY\ALL RESTRICTED APPLICATION PACKAGES:(OI)(CI)(IO)(GR,GE) Successfully processed 1 files; Failed processing 0 files

Fix: F-6001r355127_fix

Maintain the default file ACLs and configure the Security Option "Network access: Let Everyone permissions apply to anonymous users" to "Disabled" (WN19-SO-000240). Default permissions: Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to TrustedInstaller - Full control - This folder and subfolders SYSTEM - Modify - This folder only SYSTEM - Full control - Subfolders and files only Administrators - Modify - This folder only Administrators - Full control - Subfolders and files only Users - Read & execute - This folder, subfolders, and files CREATOR OWNER - Full control - Subfolders and files only ALL APPLICATION PACKAGES - Read & execute - This folder, subfolders, and files ALL RESTRICTED APPLICATION PACKAGES - Read & execute - This folder, subfolders, and files

b
Windows Server 2019 default permissions for the HKEY_LOCAL_MACHINE registry hive must be maintained.
AC-6 - Medium - CCI-002235 - V-205737 - SV-205737r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-00-000170
Vuln IDs
  • V-205737
  • V-93025
Rule IDs
  • SV-205737r877392_rule
  • SV-103113
The registry is integral to the function, security, and stability of the Windows system. Changing the system's registry permissions allows the possibility of unauthorized and anonymous modification to the operating system.
Checks: C-6002r852435_chk

Review the registry permissions for the keys of the HKEY_LOCAL_MACHINE hive noted below. If any non-privileged groups such as Everyone, Users, or Authenticated Users have greater than Read permission, this is a finding. If permissions are not as restrictive as the default permissions listed below, this is a finding: Run "Regedit". Right-click on the registry areas noted below. Select "Permissions" and the "Advanced" button. HKEY_LOCAL_MACHINE\SECURITY Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to SYSTEM - Full Control - This key and subkeys Administrators - Special - This key and subkeys HKEY_LOCAL_MACHINE\SOFTWARE Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - This key and subkeys ALL APPLICATION PACKAGES - Read - This key and subkeys HKEY_LOCAL_MACHINE\SYSTEM Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - Subkeys only ALL APPLICATION PACKAGES - Read - This key and subkeys Server Operators – Read – This Key and subkeys (Domain controllers only) Other examples under the noted keys may also be sampled. There may be some instances where non-privileged groups have greater than Read permission. Microsoft has given Read permission to the SOFTWARE and SYSTEM registry keys in Windows Server 2019 to the following SID, this is currently not a finding. S-1-15-3-1024-1065365936-1281604716-3511738428-1654721687-432734479-3232135806-4053264122-3456934681 If the defaults have not been changed, these are not a finding.

Fix: F-6002r852436_fix

Maintain the default permissions for the HKEY_LOCAL_MACHINE registry hive. The default permissions of the higher-level keys are noted below. HKEY_LOCAL_MACHINE\SECURITY Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to SYSTEM - Full Control - This key and subkeys Administrators - Special - This key and subkeys HKEY_LOCAL_MACHINE\SOFTWARE Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - This key and subkeys ALL APPLICATION PACKAGES - Read - This key and subkeys HKEY_LOCAL_MACHINE\SYSTEM Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Users - Read - This key and subkeys Administrators - Full Control - This key and subkeys SYSTEM - Full Control - This key and subkeys CREATOR OWNER - Full Control - Subkeys only ALL APPLICATION PACKAGES - Read - This key and subkeys Server Operators – Read – This Key and subkeys (Domain controllers only) Microsoft has also given Read permission to the SOFTWARE and SYSTEM registry keys in Windows Server 2019 to the following SID. S-1-15-3-1024-1065365936-1281604716-3511738428-1654721687-432734479-3232135806-4053264122-3456934681

c
Windows Server 2019 must only allow administrators responsible for the domain controller to have Administrator rights on the system.
AC-6 - High - CCI-002235 - V-205738 - SV-205738r877392_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
WN19-DC-000010
Vuln IDs
  • V-205738
  • V-93027
Rule IDs
  • SV-205738r877392_rule
  • SV-103115
An account that does not have Administrator duties must not have Administrator rights. Such rights would allow the account to bypass or modify required security restrictions on that machine and make it vulnerable to attack. System administrators must log on to systems using only accounts with the minimum level of authority necessary. Standard user accounts must not be members of the built-in Administrators group.
Checks: C-6003r355132_chk

This applies to domain controllers. A separate version applies to other systems. Review the Administrators group. Only the appropriate administrator groups or accounts responsible for administration of the system may be members of the group. Standard user accounts must not be members of the local administrator group. If prohibited accounts are members of the local administrators group, this is a finding. If the built-in Administrator account or other required administrative accounts are found on the system, this is not a finding.

Fix: F-6003r355133_fix

Configure the Administrators group to include only administrator groups or accounts that are responsible for the system. Remove any standard user accounts.

c
Windows Server 2019 permissions on the Active Directory data files must only allow System and Administrators access.
AC-6 - High - CCI-002235 - V-205739 - SV-205739r877392_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
WN19-DC-000070
Vuln IDs
  • V-205739
  • V-93029
Rule IDs
  • SV-205739r877392_rule
  • SV-103117
Improper access permissions for directory data-related files could allow unauthorized users to read, modify, or delete directory data or audit trails.
Checks: C-6004r355135_chk

This applies to domain controllers. It is NA for other systems. Run "Regedit". Navigate to "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\NTDS\Parameters". Note the directory locations in the values for: Database log files path DSA Database file By default, they will be \Windows\NTDS. If the locations are different, the following will need to be run for each. Open "Command Prompt (Admin)". Navigate to the NTDS directory (\Windows\NTDS by default). Run "icacls *.*". If the permissions on each file are not as restrictive as the following, this is a finding: NT AUTHORITY\SYSTEM:(I)(F) BUILTIN\Administrators:(I)(F) (I) - permission inherited from parent container (F) - full access

Fix: F-6004r355136_fix

Maintain the permissions on NTDS database and log files as follows: NT AUTHORITY\SYSTEM:(I)(F) BUILTIN\Administrators:(I)(F) (I) - permission inherited from parent container (F) - full access

c
Windows Server 2019 Active Directory SYSVOL directory must have the proper access control permissions.
AC-6 - High - CCI-002235 - V-205740 - SV-205740r877392_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
WN19-DC-000080
Vuln IDs
  • V-205740
  • V-93031
Rule IDs
  • SV-205740r877392_rule
  • SV-103119
Improper access permissions for directory data files could allow unauthorized users to read, modify, or delete directory data. The SYSVOL directory contains public files (to the domain) such as policies and logon scripts. Data in shared subdirectories are replicated to all domain controllers in a domain.
Checks: C-6005r852440_chk

This applies to domain controllers. It is NA for other systems. Open a command prompt. Run "net share". Make note of the directory location of the SYSVOL share. By default, this will be \Windows\SYSVOL\sysvol. For this requirement, permissions will be verified at the first SYSVOL directory level. If any standard user accounts or groups have greater than "Read & execute" permissions, this is a finding. The default permissions noted below meet this requirement: Open "Command Prompt". Run "icacls c:\Windows\SYSVOL". The following results should be displayed: NT AUTHORITY\Authenticated Users:(RX) NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(GR,GE) BUILTIN\Server Operators:(RX) BUILTIN\Server Operators:(OI)(CI)(IO)(GR,GE) BUILTIN\Administrators:(M,WDAC,WO) BUILTIN\Administrators:(OI)(CI)(IO)(F) NT AUTHORITY\SYSTEM:(F) NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(F) CREATOR OWNER:(OI)(CI)(IO)(F) (RX) - Read & execute Run "icacls /help" to view definitions of other permission codes.

Fix: F-6005r355139_fix

Maintain the permissions on the SYSVOL directory. Do not allow greater than "Read & execute" permissions for standard user accounts or groups. The defaults below meet this requirement: C:\Windows\SYSVOL Type - "Allow" for all Inherited from - "None" for all Principal - Access - Applies to Authenticated Users - Read & execute - This folder, subfolder, and files Server Operators - Read & execute- This folder, subfolder, and files Administrators - Special - This folder only (Special = Basic Permissions: all selected except Full control) CREATOR OWNER - Full control - Subfolders and files only Administrators - Full control - Subfolders and files only SYSTEM - Full control - This folder, subfolders, and files

c
Windows Server 2019 Active Directory Group Policy objects must have proper access control permissions.
AC-6 - High - CCI-002235 - V-205741 - SV-205741r877392_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
WN19-DC-000090
Vuln IDs
  • V-205741
  • V-93033
Rule IDs
  • SV-205741r877392_rule
  • SV-103121
When directory service database objects do not have appropriate access control permissions, it may be possible for malicious users to create, read, update, or delete the objects and degrade or destroy the integrity of the data. When the directory service is used for identification, authentication, or authorization functions, a compromise of the database objects could lead to a compromise of all systems relying on the directory service. For Active Directory (AD), the Group Policy objects require special attention. In a distributed administration model (i.e., help desk), Group Policy objects are more likely to have access permissions changed from the secure defaults. If inappropriate access permissions are defined for Group Policy objects, this could allow an intruder to change the security policy applied to all domain client computers (workstations and servers).
Checks: C-6006r355141_chk

This applies to domain controllers. It is NA for other systems. Review the permissions on Group Policy objects. Open "Group Policy Management" (available from various menus or run "gpmc.msc"). Navigate to "Group Policy Objects" in the domain being reviewed (Forest >> Domains >> Domain). For each Group Policy object: Select the Group Policy object item in the left pane. Select the "Delegation" tab in the right pane. Select the "Advanced" button. Select each Group or user name. View the permissions. If any standard user accounts or groups have "Allow" permissions greater than "Read" and "Apply group policy", this is a finding. Other access permissions that allow the objects to be updated are considered findings unless specifically documented by the ISSO. The default permissions noted below satisfy this requirement. The permissions shown are at the summary level. More detailed permissions can be viewed by selecting the next "Advanced" button, the desired Permission entry, and the "Edit" button. Authenticated Users - Read, Apply group policy, Special permissions The special permissions for Authenticated Users are for Read-type Properties. If detailed permissions include any Create, Delete, Modify, or Write Permissions or Properties, this is a finding. The special permissions for the following default groups are not the focus of this requirement and may include a wide range of permissions and properties: CREATOR OWNER - Special permissions SYSTEM - Read, Write, Create all child objects, Delete all child objects, Special permissions Domain Admins - Read, Write, Create all child objects, Delete all child objects, Special permissions Enterprise Admins - Read, Write, Create all child objects, Delete all child objects, Special permissions ENTERPRISE DOMAIN CONTROLLERS - Read, Special permissions The Domain Admins and Enterprise Admins will not have the "Delete all child objects" permission on the two default Group Policy objects: Default Domain Policy and Default Domain Controllers Policy. They will have this permission on organization created Group Policy objects.

Fix: F-6006r355142_fix

Maintain the permissions on Group Policy objects to not allow greater than "Read" and "Apply group policy" for standard user accounts or groups. The default permissions below meet this requirement: Authenticated Users - Read, Apply group policy, Special permissions The special permissions for Authenticated Users are for Read-type Properties. CREATOR OWNER - Special permissions SYSTEM - Read, Write, Create all child objects, Delete all child objects, Special permissions Domain Admins - Read, Write, Create all child objects, Delete all child objects, Special permissions Enterprise Admins - Read, Write, Create all child objects, Delete all child objects, Special permissions ENTERPRISE DOMAIN CONTROLLERS - Read, Special permissions Document any other access permissions that allow the objects to be updated with the ISSO. The Domain Admins and Enterprise Admins will not have the "Delete all child objects" permission on the two default Group Policy objects: Default Domain Policy and Default Domain Controllers Policy. They will have this permission on created Group Policy objects.

c
Windows Server 2019 Active Directory Domain Controllers Organizational Unit (OU) object must have the proper access control permissions.
AC-6 - High - CCI-002235 - V-205742 - SV-205742r877392_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
WN19-DC-000100
Vuln IDs
  • V-205742
  • V-93035
Rule IDs
  • SV-205742r877392_rule
  • SV-103123
When Active Directory objects do not have appropriate access control permissions, it may be possible for malicious users to create, read, update, or delete the objects and degrade or destroy the integrity of the data. When the directory service is used for identification, authentication, or authorization functions, a compromise of the database objects could lead to a compromise of all systems that rely on the directory service. The Domain Controllers OU object requires special attention as the Domain Controllers are central to the configuration and management of the domain. Inappropriate access permissions defined for the Domain Controllers OU could allow an intruder or unauthorized personnel to make changes that could lead to the compromise of the domain.
Checks: C-6007r355144_chk

This applies to domain controllers. It is NA for other systems. Review the permissions on the Domain Controllers OU. Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Select "Advanced Features" in the "View" menu if not previously selected. Select the "Domain Controllers" OU (folder in folder icon). Right-click and select "Properties". Select the "Security" tab. If the permissions on the Domain Controllers OU do not restrict changes to System, Domain Admins, Enterprise Admins and Administrators, this is a finding. The default permissions listed below satisfy this requirement. Domains supporting Microsoft Exchange will have additional Exchange related permissions on the Domain Controllers OU. These may include some change related permissions and are not a finding. The permissions shown are at the summary level. More detailed permissions can be viewed by selecting the "Advanced" button, the desired Permission entry, and the "View" or "Edit" button. Except where noted otherwise, the special permissions may include a wide range of permissions and properties and are acceptable for this requirement. CREATOR OWNER - Special permissions SELF - Special permissions Authenticated Users - Read, Special permissions The special permissions for Authenticated Users are Read types. If detailed permissions include any Create, Delete, Modify, or Write Permissions or Properties, this is a finding. SYSTEM - Full Control Domain Admins - Read, Write, Create all child objects, Generate resultant set of policy (logging), Generate resultant set of policy (planning), Special permissions Enterprise Admins - Full Control Key Admins - Special permissions Enterprise Key Admins - Special permissions Administrators - Read, Write, Create all child objects, Generate resultant set of policy (logging), Generate resultant set of policy (planning), Special permissions Pre-Windows 2000 Compatible Access - Special permissions The Special permissions for Pre-Windows 2000 Compatible Access are Read types. If detailed permissions include any Create, Delete, Modify, or Write Permissions or Properties, this is a finding. ENTERPRISE DOMAIN CONTROLLERS - Read, Special permissions

Fix: F-6007r355145_fix

Limit the permissions on the Domain Controllers OU to restrict changes to System, Domain Admins, Enterprise Admins and Administrators. The default permissions listed below satisfy this requirement. Domains supporting Microsoft Exchange will have additional Exchange related permissions on the Domain Controllers OU. These may include some change related permissions. CREATOR OWNER - Special permissions SELF - Special permissions Authenticated Users - Read, Special permissions The special permissions for Authenticated Users are Read types. SYSTEM - Full Control Domain Admins - Read, Write, Create all child objects, Generate resultant set of policy (logging), Generate resultant set of policy (planning), Special permissions Enterprise Admins - Full Control Key Admins - Special permissions Enterprise Key Admins - Special permissions Administrators - Read, Write, Create all child objects, Generate resultant set of policy (logging), Generate resultant set of policy (planning), Special permissions Pre-Windows 2000 Compatible Access - Special permissions The special permissions for Pre-Windows 2000 Compatible Access are Read types. ENTERPRISE DOMAIN CONTROLLERS - Read, Special permissions

c
Windows Server 2019 organization created Active Directory Organizational Unit (OU) objects must have proper access control permissions.
AC-6 - High - CCI-002235 - V-205743 - SV-205743r877392_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
WN19-DC-000110
Vuln IDs
  • V-205743
  • V-93037
Rule IDs
  • SV-205743r877392_rule
  • SV-103125
When directory service database objects do not have appropriate access control permissions, it may be possible for malicious users to create, read, update, or delete the objects and degrade or destroy the integrity of the data. When the directory service is used for identification, authentication, or authorization functions, a compromise of the database objects could lead to a compromise of all systems that rely on the directory service. For Active Directory, the OU objects require special attention. In a distributed administration model (i.e., help desk), OU objects are more likely to have access permissions changed from the secure defaults. If inappropriate access permissions are defined for OU objects, it could allow an intruder to add or delete users in the OU. This could result in unauthorized access to data or a denial of service (DoS) to authorized users.
Checks: C-6008r355147_chk

This applies to domain controllers. It is NA for other systems. Review the permissions on domain-defined OUs. Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Ensure "Advanced Features" is selected in the "View" menu. For each OU that is defined (folder in folder icon) excluding the Domain Controllers OU: Right-click the OU and select "Properties". Select the "Security" tab. If the Allow type permissions on the OU are not at least as restrictive as those below, this is a finding. The permissions shown are at the summary level. More detailed permissions can be viewed by selecting the "Advanced" button, the desired Permission entry, and the "Edit" or "View" button. Except where noted otherwise, the special permissions may include a wide range of permissions and properties and are acceptable for this requirement. CREATOR OWNER - Special permissions Self - Special permissions Authenticated Users - Read, Special permissions The Special permissions for Authenticated Users are Read type. If detailed permissions include any Create, Delete, Modify, or Write Permissions or Properties, this is a finding. SYSTEM - Full Control Domain Admins - Full Control Enterprise Admins - Full Control Key Admins - Special permissions Enterprise Key Admins - Special permissions Administrators - Read, Write, Create all child objects, Generate resultant set of policy (logging), Generate resultant set of policy (planning), Special permissions Pre-Windows 2000 Compatible Access - Special permissions The Special permissions for Pre-Windows 2000 Compatible Access are for Read types. If detailed permissions include any Create, Delete, Modify, or Write Permissions or Properties, this is a finding. ENTERPRISE DOMAIN CONTROLLERS - Read, Special permissions If an ISSO-approved distributed administration model (help desk or other user support staff) is implemented, permissions above Read may be allowed for groups documented by the ISSO. If any OU with improper permissions includes identification or authentication data (e.g., accounts, passwords, or password hash data) used by systems to determine access control, the severity is CAT I (e.g., OUs that include user accounts, including service/application accounts). If an OU with improper permissions does not include identification and authentication data used by systems to determine access control, the severity is CAT II (e.g., Workstation, Printer OUs).

Fix: F-6008r355148_fix

Maintain the Allow type permissions on domain-defined OUs to be at least as restrictive as the defaults below. Document any additional permissions above Read with the ISSO if an approved distributed administration model (help desk or other user support staff) is implemented. CREATOR OWNER - Special permissions Self - Special permissions Authenticated Users - Read, Special permissions The special permissions for Authenticated Users are Read type. SYSTEM - Full Control Domain Admins - Full Control Enterprise Admins - Full Control Key Admins - Special permissions Enterprise Key Admins - Special permissions Administrators - Read, Write, Create all child objects, Generate resultant set of policy (logging), Generate resultant set of policy (planning), Special permissions Pre-Windows 2000 Compatible Access - Special permissions The special permissions for Pre-Windows 2000 Compatible Access are for Read types. ENTERPRISE DOMAIN CONTROLLERS - Read, Special permissions

b
Windows Server 2019 Add workstations to domain user right must only be assigned to the Administrators group on domain controllers.
AC-6 - Medium - CCI-002235 - V-205744 - SV-205744r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-DC-000350
Vuln IDs
  • V-205744
  • V-93039
Rule IDs
  • SV-205744r877392_rule
  • SV-103127
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Add workstations to domain" right may add computers to a domain. This could result in unapproved or incorrectly configured systems being added to a domain.
Checks: C-6009r355150_chk

This applies to domain controllers. It is NA for other systems. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Add workstations to domain" right, this is a finding. - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeMachineAccountPrivilege" user right, this is a finding. S-1-5-32-544 (Administrators)

Fix: F-6009r355151_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Add workstations to domain" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 Enable computer and user accounts to be trusted for delegation user right must only be assigned to the Administrators group on domain controllers.
AC-6 - Medium - CCI-002235 - V-205745 - SV-205745r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-DC-000420
Vuln IDs
  • V-205745
  • V-93041
Rule IDs
  • SV-205745r877392_rule
  • SV-103129
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Enable computer and user accounts to be trusted for delegation" user right allows the "Trusted for Delegation" setting to be changed. This could allow unauthorized users to impersonate other users.
Checks: C-6010r355153_chk

This applies to domain controllers. A separate version applies to other systems. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Enable computer and user accounts to be trusted for delegation" user right, this is a finding. - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeEnableDelegationPrivilege" user right, this is a finding. S-1-5-32-544 (Administrators)

Fix: F-6010r355154_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Enable computer and user accounts to be trusted for delegation" to include only the following accounts or groups: - Administrators

c
Windows Server 2019 must only allow Administrators responsible for the member server or standalone or nondomain-joined system to have Administrator rights on the system.
AC-6 - High - CCI-002235 - V-205746 - SV-205746r877392_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
WN19-MS-000010
Vuln IDs
  • V-205746
  • V-93043
Rule IDs
  • SV-205746r877392_rule
  • SV-103131
An account that does not have Administrator duties must not have Administrator rights. Such rights would allow the account to bypass or modify required security restrictions on that machine and make it vulnerable to attack. System administrators must log on to systems using only accounts with the minimum level of authority necessary. For domain-joined member servers, the Domain Admins group must be replaced by a domain member server administrator group (refer to AD.0003 in the Active Directory Domain STIG). Restricting highly privileged accounts from the local Administrators group helps mitigate the risk of privilege escalation resulting from credential theft attacks. Standard user accounts must not be members of the built-in Administrators group.
Checks: C-6011r857316_chk

This applies to member servers and standalone or nondomain-joined systems. A separate version applies to domain controllers. Open "Computer Management". Navigate to "Groups" under "Local Users and Groups". Review the local "Administrators" group. Only administrator groups or accounts responsible for administration of the system may be members of the group. For domain-joined member servers, the Domain Admins group must be replaced by a domain member server administrator group. Standard user accounts must not be members of the local Administrator group. If accounts that do not have responsibility for administration of the system are members of the local Administrators group, this is a finding. If the built-in Administrator account or other required administrative accounts are found on the system, this is not a finding.

Fix: F-6011r355157_fix

Configure the local "Administrators" group to include only administrator groups or accounts responsible for administration of the system. For domain-joined member servers, replace the Domain Admins group with a domain member server administrator group. Remove any standard user accounts.

b
Windows Server 2019 must restrict remote calls to the Security Account Manager (SAM) to Administrators on domain-joined member servers and standalone or nondomain-joined systems.
AC-6 - Medium - CCI-002235 - V-205747 - SV-205747r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-MS-000060
Vuln IDs
  • V-205747
  • V-93045
Rule IDs
  • SV-205747r877392_rule
  • SV-103133
The Windows SAM stores users' passwords. Restricting Remote Procedure Call (RPC) connections to the SAM to Administrators helps protect those credentials.
Checks: C-6012r857327_chk

This applies to member servers and standalone or nondomain-joined systems. It is NA for domain controllers. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\ Value Name: RestrictRemoteSAM Value Type: REG_SZ Value: O:BAG:BAD:(A;;RC;;;BA)

Fix: F-6012r857328_fix

Navigate to the policy Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Restrict clients allowed to make remote calls to SAM". Select "Edit Security" to configure the "Security descriptor:". Add "Administrators" in "Group or user names:" if it is not already listed (this is the default). Select "Administrators" in "Group or user names:". Select "Allow" for "Remote Access" in "Permissions for "Administrators". Click "OK". The "Security descriptor:" must be populated with "O:BAG:BAD:(A;;RC;;;BA) for the policy to be enforced.

b
Windows Server 2019 "Enable computer and user accounts to be trusted for delegation" user right must not be assigned to any groups or accounts on domain-joined member servers and standalone or nondomain-joined systems.
AC-6 - Medium - CCI-002235 - V-205748 - SV-205748r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-MS-000130
Vuln IDs
  • V-205748
  • V-93047
Rule IDs
  • SV-205748r877392_rule
  • SV-103135
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Enable computer and user accounts to be trusted for delegation" user right allows the "Trusted for Delegation" setting to be changed. This could allow unauthorized users to impersonate other users.
Checks: C-6013r857340_chk

This applies to member servers and standalone or nondomain-joined systems. A separate version applies to domain controllers. Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups are granted the "Enable computer and user accounts to be trusted for delegation" user right, this is a finding. For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs are granted the "SeEnableDelegationPrivilege" user right, this is a finding.

Fix: F-6013r355163_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Enable computer and user accounts to be trusted for delegation" to be defined but containing no entries (blank).

b
Windows Server 2019 Access Credential Manager as a trusted caller user right must not be assigned to any groups or accounts.
AC-6 - Medium - CCI-002235 - V-205749 - SV-205749r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000010
Vuln IDs
  • V-205749
  • V-93049
Rule IDs
  • SV-205749r877392_rule
  • SV-103137
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Access Credential Manager as a trusted caller" user right may be able to retrieve the credentials of other accounts from Credential Manager.
Checks: C-6014r355165_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups are granted the "Access Credential Manager as a trusted caller" user right, this is a finding. For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs are granted the "SeTrustedCredManAccessPrivilege" user right, this is a finding.

Fix: F-6014r355166_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Access Credential Manager as a trusted caller" to be defined but containing no entries (blank).

c
Windows Server 2019 Act as part of the operating system user right must not be assigned to any groups or accounts.
AC-6 - High - CCI-002235 - V-205750 - SV-205750r877392_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
WN19-UR-000020
Vuln IDs
  • V-205750
  • V-93051
Rule IDs
  • SV-205750r877392_rule
  • SV-103139
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Act as part of the operating system" user right can assume the identity of any user and gain access to resources that the user is authorized to access. Any accounts with this right can take complete control of a system.
Checks: C-6015r355168_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups (to include administrators), are granted the "Act as part of the operating system" user right, this is a finding. For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs are granted the "SeTcbPrivilege" user right, this is a finding. If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060). Passwords for accounts with this user right must be protected as highly privileged accounts.

Fix: F-6015r355169_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Act as part of the operating system" to be defined but containing no entries (blank).

b
Windows Server 2019 Back up files and directories user right must only be assigned to the Administrators group.
AC-6 - Medium - CCI-002235 - V-205751 - SV-205751r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000040
Vuln IDs
  • V-205751
  • V-93053
Rule IDs
  • SV-205751r877392_rule
  • SV-103141
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Back up files and directories" user right can circumvent file and directory permissions and could allow access to sensitive data.
Checks: C-6016r355171_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Back up files and directories" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeBackupPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators) If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-6016r355172_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Back up files and directories" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 Create a pagefile user right must only be assigned to the Administrators group.
AC-6 - Medium - CCI-002235 - V-205752 - SV-205752r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000050
Vuln IDs
  • V-205752
  • V-93055
Rule IDs
  • SV-205752r877392_rule
  • SV-103143
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Create a pagefile" user right can change the size of a pagefile, which could affect system performance.
Checks: C-6017r355174_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Create a pagefile" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeCreatePagefilePrivilege" user right, this is a finding: S-1-5-32-544 (Administrators)

Fix: F-6017r355175_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Create a pagefile" to include only the following accounts or groups: - Administrators

c
Windows Server 2019 Create a token object user right must not be assigned to any groups or accounts.
AC-6 - High - CCI-002235 - V-205753 - SV-205753r877392_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
WN19-UR-000060
Vuln IDs
  • V-205753
  • V-93057
Rule IDs
  • SV-205753r877392_rule
  • SV-103145
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Create a token object" user right allows a process to create an access token. This could be used to provide elevated rights and compromise a system.
Checks: C-6018r355177_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups are granted the "Create a token object" user right, this is a finding. For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs are granted the "SeCreateTokenPrivilege" user right, this is a finding. If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060). Passwords for application accounts with this user right must be protected as highly privileged accounts.

Fix: F-6018r355178_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Create a token object" to be defined but containing no entries (blank).

b
Windows Server 2019 Create global objects user right must only be assigned to Administrators, Service, Local Service, and Network Service.
AC-6 - Medium - CCI-002235 - V-205754 - SV-205754r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000070
Vuln IDs
  • V-205754
  • V-93059
Rule IDs
  • SV-205754r877392_rule
  • SV-103147
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Create global objects" user right can create objects that are available to all sessions, which could affect processes in other users' sessions.
Checks: C-6019r355180_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Create global objects" user right, this is a finding: - Administrators - Service - Local Service - Network Service For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeCreateGlobalPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators) S-1-5-6 (Service) S-1-5-19 (Local Service) S-1-5-20 (Network Service) If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-6019r355181_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Create global objects" to include only the following accounts or groups: - Administrators - Service - Local Service - Network Service

b
Windows Server 2019 Create permanent shared objects user right must not be assigned to any groups or accounts.
AC-6 - Medium - CCI-002235 - V-205755 - SV-205755r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000080
Vuln IDs
  • V-205755
  • V-93061
Rule IDs
  • SV-205755r877392_rule
  • SV-103149
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Create permanent shared objects" user right could expose sensitive data by creating shared objects.
Checks: C-6020r355183_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups are granted the "Create permanent shared objects" user right, this is a finding. For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs are granted the "SeCreatePermanentPrivilege" user right, this is a finding.

Fix: F-6020r355184_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Create permanent shared objects" to be defined but containing no entries (blank).

b
Windows Server 2019 Create symbolic links user right must only be assigned to the Administrators group.
AC-6 - Medium - CCI-002235 - V-205756 - SV-205756r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000090
Vuln IDs
  • V-205756
  • V-93063
Rule IDs
  • SV-205756r877392_rule
  • SV-103151
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Create symbolic links" user right can create pointers to other objects, which could expose the system to attack.
Checks: C-6021r355186_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Create symbolic links" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeCreateSymbolicLinkPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators) Systems that have the Hyper-V role will also have "Virtual Machines" given this user right (this may be displayed as "NT Virtual Machine\Virtual Machines", SID S-1-5-83-0). This is not a finding.

Fix: F-6021r355187_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Create symbolic links" to include only the following accounts or groups: - Administrators Systems that have the Hyper-V role will also have "Virtual Machines" given this user right. If this needs to be added manually, enter it as "NT Virtual Machine\Virtual Machines".

c
Windows Server 2019 Debug programs: user right must only be assigned to the Administrators group.
AC-6 - High - CCI-002235 - V-205757 - SV-205757r877392_rule
RMF Control
AC-6
Severity
High
CCI
CCI-002235
Version
WN19-UR-000100
Vuln IDs
  • V-205757
  • V-93065
Rule IDs
  • SV-205757r877392_rule
  • SV-103153
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Debug programs" user right can attach a debugger to any process or to the kernel, providing complete access to sensitive and critical operating system components. This right is given to Administrators in the default configuration.
Checks: C-6022r355189_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Debug programs" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeDebugPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators) If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060). Passwords for application accounts with this user right must be protected as highly privileged accounts.

Fix: F-6022r355190_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Debug programs" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 Force shutdown from a remote system user right must only be assigned to the Administrators group.
AC-6 - Medium - CCI-002235 - V-205758 - SV-205758r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000110
Vuln IDs
  • V-205758
  • V-93067
Rule IDs
  • SV-205758r877392_rule
  • SV-103155
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Force shutdown from a remote system" user right can remotely shut down a system, which could result in a denial of service.
Checks: C-6023r355192_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Force shutdown from a remote system" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeRemoteShutdownPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators)

Fix: F-6023r355193_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Force shutdown from a remote system" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 Generate security audits user right must only be assigned to Local Service and Network Service.
AC-6 - Medium - CCI-002235 - V-205759 - SV-205759r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000120
Vuln IDs
  • V-205759
  • V-93069
Rule IDs
  • SV-205759r877392_rule
  • SV-103157
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Generate security audits" user right specifies users and processes that can generate Security Log audit records, which must only be the system service accounts defined.
Checks: C-6024r355195_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Generate security audits" user right, this is a finding: - Local Service - Network Service For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeAuditPrivilege" user right, this is a finding: S-1-5-19 (Local Service) S-1-5-20 (Network Service) If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-6024r355196_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Generate security audits" to include only the following accounts or groups: - Local Service - Network Service

b
Windows Server 2019 Impersonate a client after authentication user right must only be assigned to Administrators, Service, Local Service, and Network Service.
AC-6 - Medium - CCI-002235 - V-205760 - SV-205760r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000130
Vuln IDs
  • V-205760
  • V-93071
Rule IDs
  • SV-205760r877392_rule
  • SV-103159
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Impersonate a client after authentication" user right allows a program to impersonate another user or account to run on their behalf. An attacker could use this to elevate privileges.
Checks: C-6025r355198_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Impersonate a client after authentication" user right, this is a finding: - Administrators - Service - Local Service - Network Service For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeImpersonatePrivilege" user right, this is a finding: S-1-5-32-544 (Administrators) S-1-5-6 (Service) S-1-5-19 (Local Service) S-1-5-20 (Network Service) If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-6025r355199_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Impersonate a client after authentication" to include only the following accounts or groups: - Administrators - Service - Local Service - Network Service

b
Windows Server 2019 Increase scheduling priority: user right must only be assigned to the Administrators group.
AC-6 - Medium - CCI-002235 - V-205761 - SV-205761r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000140
Vuln IDs
  • V-205761
  • V-93073
Rule IDs
  • SV-205761r877392_rule
  • SV-103161
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Increase scheduling priority" user right can change a scheduling priority, causing performance issues or a denial of service.
Checks: C-6026r355201_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Increase scheduling priority" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeIncreaseBasePriorityPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators) If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-6026r355202_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Increase scheduling priority" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 Load and unload device drivers user right must only be assigned to the Administrators group.
AC-6 - Medium - CCI-002235 - V-205762 - SV-205762r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000150
Vuln IDs
  • V-205762
  • V-93075
Rule IDs
  • SV-205762r877392_rule
  • SV-103163
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Load and unload device drivers" user right allows a user to load device drivers dynamically on a system. This could be used by an attacker to install malicious code.
Checks: C-6027r355204_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Load and unload device drivers" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeLoadDriverPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators)

Fix: F-6027r355205_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Load and unload device drivers" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 Lock pages in memory user right must not be assigned to any groups or accounts.
AC-6 - Medium - CCI-002235 - V-205763 - SV-205763r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000160
Vuln IDs
  • V-205763
  • V-93077
Rule IDs
  • SV-205763r877392_rule
  • SV-103165
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. The "Lock pages in memory" user right allows physical memory to be assigned to processes, which could cause performance issues or a denial of service.
Checks: C-6028r355207_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups are granted the "Lock pages in memory" user right, this is a finding. For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs are granted the "SeLockMemoryPrivilege" user right, this is a finding. If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-6028r355208_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Lock pages in memory" to be defined but containing no entries (blank).

b
Windows Server 2019 Modify firmware environment values user right must only be assigned to the Administrators group.
AC-6 - Medium - CCI-002235 - V-205764 - SV-205764r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000180
Vuln IDs
  • V-205764
  • V-93079
Rule IDs
  • SV-205764r877392_rule
  • SV-103167
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Modify firmware environment values" user right can change hardware configuration environment variables. This could result in hardware failures or a denial of service.
Checks: C-6029r355210_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Modify firmware environment values" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeSystemEnvironmentPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators)

Fix: F-6029r355211_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Modify firmware environment values" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 Perform volume maintenance tasks user right must only be assigned to the Administrators group.
AC-6 - Medium - CCI-002235 - V-205765 - SV-205765r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000190
Vuln IDs
  • V-205765
  • V-93081
Rule IDs
  • SV-205765r877392_rule
  • SV-103169
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Perform volume maintenance tasks" user right can manage volume and disk configurations. This could be used to delete volumes, resulting in data loss or a denial of service.
Checks: C-6030r355213_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Perform volume maintenance tasks" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeManageVolumePrivilege" user right, this is a finding: S-1-5-32-544 (Administrators)

Fix: F-6030r355214_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Perform volume maintenance tasks" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 Profile single process user right must only be assigned to the Administrators group.
AC-6 - Medium - CCI-002235 - V-205766 - SV-205766r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000200
Vuln IDs
  • V-205766
  • V-93083
Rule IDs
  • SV-205766r877392_rule
  • SV-103171
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Profile single process" user right can monitor non-system processes performance. An attacker could use this to identify processes to attack.
Checks: C-6031r355216_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Profile single process" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeProfileSingleProcessPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators)

Fix: F-6031r355217_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Profile single process" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 Restore files and directories user right must only be assigned to the Administrators group.
AC-6 - Medium - CCI-002235 - V-205767 - SV-205767r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000210
Vuln IDs
  • V-205767
  • V-93085
Rule IDs
  • SV-205767r877392_rule
  • SV-103173
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Restore files and directories" user right can circumvent file and directory permissions and could allow access to sensitive data. It could also be used to overwrite more current data.
Checks: C-6032r355219_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Restore files and directories" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeRestorePrivilege" user right, this is a finding: S-1-5-32-544 (Administrators) If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-6032r355220_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Restore files and directories" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 Take ownership of files or other objects user right must only be assigned to the Administrators group.
AC-6 - Medium - CCI-002235 - V-205768 - SV-205768r877392_rule
RMF Control
AC-6
Severity
Medium
CCI
CCI-002235
Version
WN19-UR-000220
Vuln IDs
  • V-205768
  • V-93087
Rule IDs
  • SV-205768r877392_rule
  • SV-103175
Inappropriate granting of user rights can provide system, administrative, and other high-level capabilities. Accounts with the "Take ownership of files or other objects" user right can take ownership of objects and make changes.
Checks: C-6033r355222_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. If any accounts or groups other than the following are granted the "Take ownership of files or other objects" user right, this is a finding: - Administrators For server core installations, run the following command: Secedit /Export /Areas User_Rights /cfg c:\path\filename.txt Review the text file. If any SIDs other than the following are granted the "SeTakeOwnershipPrivilege" user right, this is a finding: S-1-5-32-544 (Administrators) If an application requires this user right, this would not be a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented with the ISSO. The application account must meet requirements for application account passwords, such as length (WN19-00-000050) and required frequency of changes (WN19-00-000060).

Fix: F-6033r355223_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment >> "Take ownership of files or other objects" to include only the following accounts or groups: - Administrators

b
Windows Server 2019 must be configured to audit Account Management - Other Account Management Events successes.
AU-12 - Medium - CCI-000172 - V-205769 - SV-205769r852470_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000090
Vuln IDs
  • V-205769
  • V-93089
Rule IDs
  • SV-205769r852470_rule
  • SV-103177
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Other Account Management Events records events such as the access of a password hash or the Password Policy Checking API being called. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000064-GPOS-00033, SRG-OS-000462-GPOS-00206, SRG-OS-000466-GPOS-00210
Checks: C-6034r355225_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding: Account Management >> Other Account Management Events - Success

Fix: F-6034r355226_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Account Management >> "Audit Other Account Management Events" with "Success" selected.

b
Windows Server 2019 must be configured to audit Detailed Tracking - Process Creation successes.
AU-12 - Medium - CCI-000172 - V-205770 - SV-205770r852471_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000140
Vuln IDs
  • V-205770
  • V-93091
Rule IDs
  • SV-205770r852471_rule
  • SV-103179
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Process Creation records events related to the creation of a process and the source. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000471-GPOS-00215
Checks: C-6035r355228_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Detailed Tracking >> Process Creation - Success

Fix: F-6035r355229_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Detailed Tracking >> "Audit Process Creation" with "Success" selected.

b
Windows Server 2019 must be configured to audit Policy Change - Audit Policy Change successes.
AU-12 - Medium - CCI-000172 - V-205771 - SV-205771r852472_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000260
Vuln IDs
  • V-205771
  • V-93093
Rule IDs
  • SV-205771r852472_rule
  • SV-103181
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Audit Policy Change records events related to changes in audit policy. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6036r355231_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Policy Change >> Audit Policy Change - Success

Fix: F-6036r355232_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Policy Change >> "Audit Audit Policy Change" with "Success" selected.

b
Windows Server 2019 must be configured to audit Policy Change - Audit Policy Change failures.
AU-12 - Medium - CCI-000172 - V-205772 - SV-205772r852473_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000270
Vuln IDs
  • V-205772
  • V-93095
Rule IDs
  • SV-205772r852473_rule
  • SV-103183
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Audit Policy Change records events related to changes in audit policy. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6037r355234_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Policy Change >> Audit Policy Change - Failure

Fix: F-6037r355235_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Policy Change >> "Audit Audit Policy Change" with "Failure" selected.

b
Windows Server 2019 must be configured to audit Policy Change - Authentication Policy Change successes.
AU-12 - Medium - CCI-000172 - V-205773 - SV-205773r852474_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000280
Vuln IDs
  • V-205773
  • V-93097
Rule IDs
  • SV-205773r852474_rule
  • SV-103185
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Authentication Policy Change records events related to changes in authentication policy, including Kerberos policy and Trust changes. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000064-GPOS-00033, SRG-OS-000462-GPOS-00206, SRG-OS-000466-GPOS-00210
Checks: C-6038r355237_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Policy Change >> Authentication Policy Change - Success

Fix: F-6038r355238_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Policy Change >> "Audit Authentication Policy Change" with "Success" selected.

b
Windows Server 2019 must be configured to audit Policy Change - Authorization Policy Change successes.
AU-12 - Medium - CCI-000172 - V-205774 - SV-205774r852475_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000290
Vuln IDs
  • V-205774
  • V-93099
Rule IDs
  • SV-205774r852475_rule
  • SV-103187
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Authorization Policy Change records events related to changes in user rights, such as "Create a token object". Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000064-GPOS-00033, SRG-OS-000462-GPOS-00206, SRG-OS-000466-GPOS-00210
Checks: C-6039r355240_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Policy Change >> Authorization Policy Change - Success

Fix: F-6039r355241_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Policy Change >> "Audit Authorization Policy Change" with "Success" selected.

b
Windows Server 2019 must be configured to audit Privilege Use - Sensitive Privilege Use successes.
AU-12 - Medium - CCI-000172 - V-205775 - SV-205775r852476_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000300
Vuln IDs
  • V-205775
  • V-93101
Rule IDs
  • SV-205775r852476_rule
  • SV-103189
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Sensitive Privilege Use records events related to use of sensitive privileges, such as "Act as part of the operating system" or "Debug programs". Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000064-GPOS-00033, SRG-OS-000462-GPOS-00206, SRG-OS-000466-GPOS-00210
Checks: C-6040r355243_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Privilege Use >> Sensitive Privilege Use - Success

Fix: F-6040r355244_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Privilege Use >> "Audit Sensitive Privilege Use" with "Success" selected.

b
Windows Server 2019 must be configured to audit Privilege Use - Sensitive Privilege Use failures.
AU-12 - Medium - CCI-000172 - V-205776 - SV-205776r852477_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000310
Vuln IDs
  • V-205776
  • V-93103
Rule IDs
  • SV-205776r852477_rule
  • SV-103191
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Sensitive Privilege Use records events related to use of sensitive privileges, such as "Act as part of the operating system" or "Debug programs". Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000064-GPOS-00033, SRG-OS-000462-GPOS-00206, SRG-OS-000466-GPOS-00210
Checks: C-6041r355246_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Privilege Use >> Sensitive Privilege Use - Failure

Fix: F-6041r355247_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Privilege Use >> "Audit Sensitive Privilege Use" with "Failure" selected.

b
Windows Server 2019 must be configured to audit System - IPsec Driver successes.
AU-12 - Medium - CCI-000172 - V-205777 - SV-205777r852478_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000320
Vuln IDs
  • V-205777
  • V-93105
Rule IDs
  • SV-205777r852478_rule
  • SV-103193
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. IPsec Driver records events related to the IPsec Driver, such as dropped packets. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6042r355249_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. System >> IPsec Driver - Success

Fix: F-6042r355250_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> System >> "Audit IPsec Driver" with "Success" selected.

b
Windows Server 2019 must be configured to audit System - IPsec Driver failures.
AU-12 - Medium - CCI-000172 - V-205778 - SV-205778r852479_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000330
Vuln IDs
  • V-205778
  • V-93107
Rule IDs
  • SV-205778r852479_rule
  • SV-103195
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. IPsec Driver records events related to the IPsec Driver, such as dropped packets. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6043r355252_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. System >> IPsec Driver - Failure

Fix: F-6043r355253_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> System >> "Audit IPsec Driver" with "Failure" selected.

b
Windows Server 2019 must be configured to audit System - Other System Events successes.
AU-12 - Medium - CCI-000172 - V-205779 - SV-205779r852480_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000340
Vuln IDs
  • V-205779
  • V-93109
Rule IDs
  • SV-205779r852480_rule
  • SV-103197
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Audit Other System Events records information related to cryptographic key operations and the Windows Firewall service. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6044r355699_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. System >> Other System Events - Success

Fix: F-6044r355700_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> System >> "Audit Other System Events" with "Success" selected.

b
Windows Server 2019 must be configured to audit System - Other System Events failures.
AU-12 - Medium - CCI-000172 - V-205780 - SV-205780r852481_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000350
Vuln IDs
  • V-205780
  • V-93111
Rule IDs
  • SV-205780r852481_rule
  • SV-103199
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Audit Other System Events records information related to cryptographic key operations and the Windows Firewall service. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6045r355702_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. System >> Other System Events - Failure

Fix: F-6045r355703_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> System >> "Audit Other System Events" with "Failure" selected.

b
Windows Server 2019 must be configured to audit System - Security State Change successes.
AU-12 - Medium - CCI-000172 - V-205781 - SV-205781r852482_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000360
Vuln IDs
  • V-205781
  • V-93113
Rule IDs
  • SV-205781r852482_rule
  • SV-103201
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Security State Change records events related to changes in the security state, such as startup and shutdown of the system. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6046r355705_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. System >> Security State Change - Success

Fix: F-6046r355706_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> System >> "Audit Security State Change" with "Success" selected.

b
Windows Server 2019 must be configured to audit System - Security System Extension successes.
AU-12 - Medium - CCI-000172 - V-205782 - SV-205782r852483_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000370
Vuln IDs
  • V-205782
  • V-93115
Rule IDs
  • SV-205782r852483_rule
  • SV-103203
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Security System Extension records events related to extension code being loaded by the security subsystem. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6047r355708_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. System >> Security System Extension - Success

Fix: F-6047r355709_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> System >> "Audit Security System Extension" with "Success" selected.

b
Windows Server 2019 must be configured to audit System - System Integrity successes.
AU-12 - Medium - CCI-000172 - V-205783 - SV-205783r852484_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000380
Vuln IDs
  • V-205783
  • V-93117
Rule IDs
  • SV-205783r852484_rule
  • SV-103205
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. System Integrity records events related to violations of integrity to the security subsystem. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000477-GPOS-00222
Checks: C-6048r355711_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. System >> System Integrity - Success

Fix: F-6048r355712_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> System >> "Audit System Integrity" with "Success" selected.

b
Windows Server 2019 must be configured to audit System - System Integrity failures.
AU-12 - Medium - CCI-000172 - V-205784 - SV-205784r852485_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000390
Vuln IDs
  • V-205784
  • V-93119
Rule IDs
  • SV-205784r852485_rule
  • SV-103207
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. System Integrity records events related to violations of integrity to the security subsystem. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000471-GPOS-00215, SRG-OS-000471-GPOS-00216, SRG-OS-000477-GPOS-00222
Checks: C-6049r355714_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. System >> System Integrity - Failure

Fix: F-6049r355715_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> System >> "Audit System Integrity" with "Failure" selected.

b
Windows Server 2019 Active Directory Group Policy objects must be configured with proper audit settings.
AU-12 - Medium - CCI-000172 - V-205785 - SV-205785r852486_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-DC-000170
Vuln IDs
  • V-205785
  • V-93121
Rule IDs
  • SV-205785r852486_rule
  • SV-103209
When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The impact of missing audit data is related to the type of object. A failure to capture audit data for objects used by identification, authentication, or authorization functions could degrade or eliminate the ability to track changes to access policy for systems or data. For Active Directory (AD), there are a number of critical object types in the domain naming context of the AD database for which auditing is essential. This includes Group Policy objects. Because changes to these objects can significantly impact access controls or the availability of systems, the absence of auditing data makes it impossible to identify the source of changes that impact the confidentiality, integrity, and availability of data and systems throughout an AD domain. The lack of proper auditing can result in insufficient forensic evidence needed to investigate an incident and prosecute the intruder. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6050r355717_chk

This applies to domain controllers. It is NA for other systems. Review the auditing configuration for all Group Policy objects. Open "Group Policy Management" (available from various menus or run "gpmc.msc"). Navigate to "Group Policy Objects" in the domain being reviewed (Forest >> Domains >> Domain). For each Group Policy object: Select the Group Policy object item in the left pane. Select the "Delegation" tab in the right pane. Select the "Advanced" button. Select the "Advanced" button again and then the "Auditing" tab. If the audit settings for any Group Policy object are not at least as inclusive as those below, this is a finding: Type - Fail Principal - Everyone Access - Full Control Applies to - This object and all descendant objects or Descendant groupPolicyContainer objects The three Success types listed below are defaults inherited from the Parent Object. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Type - Success Principal - Everyone Access - Special (Permissions: Write all properties, Modify permissions; Properties: all "Write" type selected) Inherited from - Parent Object Applies to - Descendant groupPolicyContainer objects Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - blank (Permissions: none selected; Properties: one instance - Write gPLink, one instance - Write gPOptions) Inherited from - Parent Object Applies to - Descendant Organization Unit Objects

Fix: F-6050r355718_fix

Configure the audit settings for Group Policy objects to include the following: This can be done at the Policy level in Active Directory to apply to all group policies. Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Select "Advanced Features" from the "View" Menu. Navigate to [Domain] >> System >> Policies in the left panel. Right click "Policies", select "Properties". Select the "Security" tab. Select the "Advanced" button. Select the "Auditing" tab. Type - Fail Principal - Everyone Access - Full Control Applies to - This object and all descendant objects or Descendant groupPolicyContainer objects The three Success types listed below are defaults inherited from the Parent Object. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Type - Success Principal - Everyone Access - Special (Permissions: Write all properties, Modify permissions; Properties: all "Write" type selected) Inherited from - Parent Object Applies to - Descendant groupPolicyContainer objects Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - blank (Permissions: none selected; Properties: one instance - Write gPLink, one instance - Write gPOptions) Inherited from - Parent Object Applies to - Descendant Organization Unit Objects

b
Windows Server 2019 Active Directory Domain object must be configured with proper audit settings.
AU-12 - Medium - CCI-000172 - V-205786 - SV-205786r852487_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-DC-000180
Vuln IDs
  • V-205786
  • V-93123
Rule IDs
  • SV-205786r852487_rule
  • SV-103211
When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The impact of missing audit data is related to the type of object. A failure to capture audit data for objects used by identification, authentication, or authorization functions could degrade or eliminate the ability to track changes to access policy for systems or data. For Active Directory (AD), there are a number of critical object types in the domain naming context of the AD database for which auditing is essential. This includes the Domain object. Because changes to these objects can significantly impact access controls or the availability of systems, the absence of auditing data makes it impossible to identify the source of changes that impact the confidentiality, integrity, and availability of data and systems throughout an AD domain. The lack of proper auditing can result in insufficient forensic evidence needed to investigate an incident and prosecute the intruder. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6051r355720_chk

This applies to domain controllers. It is NA for other systems. Review the auditing configuration for the Domain object. Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Ensure "Advanced Features" is selected in the "View" menu. Select the domain being reviewed in the left pane. Right-click the domain name and select "Properties". Select the "Security" tab. Select the "Advanced" button and then the "Auditing" tab. If the audit settings on the Domain object are not at least as inclusive as those below, this is a finding: Type - Fail Principal - Everyone Access - Full Control Inherited from - None Applies to - This object only The success types listed below are defaults. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Various Properties selections may also exist by default. Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - (blank) Inherited from - None Applies to - Special Type - Success Principal - Domain Users Access - All extended rights Inherited from - None Applies to - This object only Type - Success Principal - Administrators Access - All extended rights Inherited from - None Applies to - This object only Type - Success Principal - Everyone Access - Special Inherited from - None Applies to - This object only (Access - Special = Permissions: Write all properties, Modify permissions, Modify owner)

Fix: F-6051r355721_fix

Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Ensure "Advanced Features" is selected in the "View" menu. Select the domain being reviewed in the left pane. Right-click the domain name and select "Properties". Select the "Security" tab. Select the "Advanced" button and then the "Auditing" tab. Configure the audit settings for Domain object to include the following: Type - Fail Principal - Everyone Access - Full Control Inherited from - None Applies to - This object only The success types listed below are defaults. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Various Properties selections may also exist by default. Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - (blank) Inherited from - None Applies to - Special Type - Success Principal - Domain Users Access - All extended rights Inherited from - None Applies to - This object only Type - Success Principal - Administrators Access - All extended rights Inherited from - None Applies to - This object only Type - Success Principal - Everyone Access - Special Inherited from - None Applies to - This object only (Access - Special = Permissions: Write all properties, Modify permissions, Modify owner.)

b
Windows Server 2019 Active Directory Infrastructure object must be configured with proper audit settings.
AU-12 - Medium - CCI-000172 - V-205787 - SV-205787r852488_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-DC-000190
Vuln IDs
  • V-205787
  • V-93125
Rule IDs
  • SV-205787r852488_rule
  • SV-103213
When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The impact of missing audit data is related to the type of object. A failure to capture audit data for objects used by identification, authentication, or authorization functions could degrade or eliminate the ability to track changes to access policy for systems or data. For Active Directory (AD), there are a number of critical object types in the domain naming context of the AD database for which auditing is essential. This includes the Infrastructure object. Because changes to these objects can significantly impact access controls or the availability of systems, the absence of auditing data makes it impossible to identify the source of changes that impact the confidentiality, integrity, and availability of data and systems throughout an AD domain. The lack of proper auditing can result in insufficient forensic evidence needed to investigate an incident and prosecute the intruder. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6052r355723_chk

This applies to domain controllers. It is NA for other systems. Review the auditing configuration for Infrastructure object. Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Ensure "Advanced Features" is selected in the "View" menu. Select the domain being reviewed in the left pane. Right-click the "Infrastructure" object in the right pane and select "Properties". Select the "Security" tab. Select the "Advanced" button and then the "Auditing" tab. If the audit settings on the Infrastructure object are not at least as inclusive as those below, this is a finding: Type - Fail Principal - Everyone Access - Full Control Inherited from - None The success types listed below are defaults. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Various Properties selections may also exist by default. Type - Success Principal - Everyone Access - Special Inherited from - None (Access - Special = Permissions: Write all properties, All extended rights, Change infrastructure master) Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - (blank) Inherited from - (CN of domain)

Fix: F-6052r355724_fix

Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Ensure "Advanced Features" is selected in the "View" menu. Select the domain being reviewed in the left pane. Right-click the "Infrastructure" object in the right pane and select "Properties". Select the "Security" tab. Select the "Advanced" button and then the "Auditing" tab. Configure the audit settings for Infrastructure object to include the following: Type - Fail Principal - Everyone Access - Full Control Inherited from - None The success types listed below are defaults. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Various Properties selections may also exist by default. Type - Success Principal - Everyone Access - Special Inherited from - None (Access - Special = Permissions: Write all properties, All extended rights, Change infrastructure master) Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - (blank) Inherited from - (CN of domain)

b
Windows Server 2019 Active Directory Domain Controllers Organizational Unit (OU) object must be configured with proper audit settings.
AU-12 - Medium - CCI-000172 - V-205788 - SV-205788r852489_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-DC-000200
Vuln IDs
  • V-205788
  • V-93127
Rule IDs
  • SV-205788r852489_rule
  • SV-103215
When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The impact of missing audit data is related to the type of object. A failure to capture audit data for objects used by identification, authentication, or authorization functions could degrade or eliminate the ability to track changes to access policy for systems or data. For Active Directory (AD), there are a number of critical object types in the domain naming context of the AD database for which auditing is essential. This includes the Domain Controller OU object. Because changes to these objects can significantly impact access controls or the availability of systems, the absence of auditing data makes it impossible to identify the source of changes that impact the confidentiality, integrity, and availability of data and systems throughout an AD domain. The lack of proper auditing can result in insufficient forensic evidence needed to investigate an incident and prosecute the intruder. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6053r355726_chk

This applies to domain controllers. It is NA for other systems. Review the auditing configuration for the Domain Controller OU object. Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Ensure "Advanced Features" is selected in the "View" menu. Select the "Domain Controllers OU" under the domain being reviewed in the left pane. Right-click the "Domain Controllers OU" object and select "Properties". Select the "Security" tab. Select the "Advanced" button and then the "Auditing" tab. If the audit settings on the Domain Controllers OU object are not at least as inclusive as those below, this is a finding: Type - Fail Principal - Everyone Access - Full Control Inherited from - None Applies to - This object and all descendant objects The success types listed below are defaults. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Various Properties selections may also exist by default. Type - Success Principal - Everyone Access - Special Inherited from - None Applies to - This object only (Access - Special = Permissions: all create, delete and modify permissions) Type - Success Principal - Everyone Access - Write all properties Inherited from - None Applies to - This object and all descendant objects Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - (blank) Inherited from - (CN of domain) Applies to - Descendant Organizational Unit objects

Fix: F-6053r355727_fix

Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Ensure "Advanced Features" is selected in the "View" menu. Select the "Domain Controllers OU" under the domain being reviewed in the left pane. Right-click the "Domain Controllers OU" object and select "Properties". Select the "Security" tab. Select the "Advanced" button and then the "Auditing" tab. Configure the audit settings for Domain Controllers OU object to include the following: Type - Fail Principal - Everyone Access - Full Control Inherited from - None The success types listed below are defaults. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Various Properties selections may also exist by default. Type - Success Principal - Everyone Access - Special Inherited from - None Applies to - This object only (Access - Special = Permissions: all create, delete and modify permissions) Type - Success Principal - Everyone Access - Write all properties Inherited from - None Applies to - This object and all descendant objects Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - (blank) Inherited from - (CN of domain) Applies to - Descendant Organizational Unit objects

b
Windows Server 2019 Active Directory AdminSDHolder object must be configured with proper audit settings.
AU-12 - Medium - CCI-000172 - V-205789 - SV-205789r852490_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-DC-000210
Vuln IDs
  • V-205789
  • V-93129
Rule IDs
  • SV-205789r852490_rule
  • SV-103217
When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The impact of missing audit data is related to the type of object. A failure to capture audit data for objects used by identification, authentication, or authorization functions could degrade or eliminate the ability to track changes to access policy for systems or data. For Active Directory (AD), there are a number of critical object types in the domain naming context of the AD database for which auditing is essential. This includes the AdminSDHolder object. Because changes to these objects can significantly impact access controls or the availability of systems, the absence of auditing data makes it impossible to identify the source of changes that impact the confidentiality, integrity, and availability of data and systems throughout an AD domain. The lack of proper auditing can result in insufficient forensic evidence needed to investigate an incident and prosecute the intruder. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6054r355729_chk

This applies to domain controllers. It is NA for other systems. Review the auditing configuration for the "AdminSDHolder" object. Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Ensure "Advanced Features" is selected in the "View" menu. Select "System" under the domain being reviewed in the left pane. Right-click the "AdminSDHolder" object in the right pane and select "Properties". Select the "Security" tab. Select the "Advanced" button and then the "Auditing" tab. If the audit settings on the "AdminSDHolder" object are not at least as inclusive as those below, this is a finding: Type - Fail Principal - Everyone Access - Full Control Inherited from - None Applies to - This object only The success types listed below are defaults. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Various Properties selections may also exist by default. Type - Success Principal - Everyone Access - Special Inherited from - None Applies to - This object only (Access - Special = Write all properties, Modify permissions, Modify owner) Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - (blank) Inherited from - (CN of domain) Applies to - Descendant Organizational Unit objects

Fix: F-6054r355730_fix

Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Ensure "Advanced Features" is selected in the "View" menu. Select "System" under the domain being reviewed in the left pane. Right-click the "AdminSDHolder" object in the right pane and select "Properties". Select the "Security" tab. Select the "Advanced" button and then the "Auditing" tab. Configure the audit settings for AdminSDHolder object to include the following: Type - Fail Principal - Everyone Access - Full Control Inherited from - None Applies to - This object only The success types listed below are defaults. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Various Properties selections may also exist by default. Type - Success Principal - Everyone Access - Special Inherited from - None Applies to - This object only (Access - Special = Write all properties, Modify permissions, Modify owner) Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - (blank) Inherited from - (CN of domain) Applies to - Descendant Organizational Unit objects

b
Windows Server 2019 Active Directory RID Manager$ object must be configured with proper audit settings.
AU-12 - Medium - CCI-000172 - V-205790 - SV-205790r852491_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-DC-000220
Vuln IDs
  • V-205790
  • V-93131
Rule IDs
  • SV-205790r852491_rule
  • SV-103219
When inappropriate audit settings are configured for directory service database objects, it may be possible for a user or process to update the data without generating any tracking data. The impact of missing audit data is related to the type of object. A failure to capture audit data for objects used by identification, authentication, or authorization functions could degrade or eliminate the ability to track changes to access policy for systems or data. For Active Directory (AD), there are a number of critical object types in the domain naming context of the AD database for which auditing is essential. This includes the RID Manager$ object. Because changes to these objects can significantly impact access controls or the availability of systems, the absence of auditing data makes it impossible to identify the source of changes that impact the confidentiality, integrity, and availability of data and systems throughout an AD domain. The lack of proper auditing can result in insufficient forensic evidence needed to investigate an incident and prosecute the intruder. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6055r355732_chk

This applies to domain controllers. It is NA for other systems. Review the auditing configuration for the "RID Manager$" object. Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Ensure "Advanced Features" is selected in the "View" menu. Select "System" under the domain being reviewed in the left pane. Right-click the "RID Manager$" object in the right pane and select "Properties". Select the "Security" tab. Select the "Advanced" button and then the "Auditing" tab. If the audit settings on the "RID Manager$" object are not at least as inclusive as those below, this is a finding: Type - Fail Principal - Everyone Access - Full Control Inherited from - None The success types listed below are defaults. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Various Properties selections may also exist by default. Type - Success Principal - Everyone Access - Special Inherited from - None (Access - Special = Write all properties, All extended rights, Change RID master) Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - (blank) Inherited from - (CN of domain)

Fix: F-6055r355733_fix

Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Ensure "Advanced Features" is selected in the "View" menu. Select "System" under the domain being reviewed in the left pane. Right-click the "RID Manager$" object in the right pane and select "Properties". Select the "Security" tab. Select the "Advanced" button and then the "Auditing" tab. Configure the audit settings for RID Manager$ object to include the following: Type - Fail Principal - Everyone Access - Full Control Inherited from - None The success types listed below are defaults. Where Special is listed in the summary screens for Access, detailed Permissions are provided for reference. Various Properties selections may also exist by default. Type - Success Principal - Everyone Access - Special Inherited from - None (Access - Special = Write all properties, All extended rights, Change RID master) Two instances with the following summary information will be listed: Type - Success Principal - Everyone Access - (blank) Inherited from - (CN of domain)

b
Windows Server 2019 must be configured to audit DS Access - Directory Service Access successes.
AU-12 - Medium - CCI-000172 - V-205791 - SV-205791r852492_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-DC-000240
Vuln IDs
  • V-205791
  • V-93133
Rule IDs
  • SV-205791r852492_rule
  • SV-103221
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Audit Directory Service Access records events related to users accessing an Active Directory object. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6056r355735_chk

This applies to domain controllers. It is NA for other systems. Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. DS Access >> Directory Service Access - Success

Fix: F-6056r355736_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> DS Access >> "Directory Service Access" with "Success" selected.

b
Windows Server 2019 must be configured to audit DS Access - Directory Service Access failures.
AU-12 - Medium - CCI-000172 - V-205792 - SV-205792r852493_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-DC-000250
Vuln IDs
  • V-205792
  • V-93135
Rule IDs
  • SV-205792r852493_rule
  • SV-103223
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Audit Directory Service Access records events related to users accessing an Active Directory object. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6057r355738_chk

This applies to domain controllers. It is NA for other systems. Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. DS Access >> Directory Service Access - Failure

Fix: F-6057r355739_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> DS Access >> "Directory Service Access" with "Failure" selected.

b
Windows Server 2019 must be configured to audit DS Access - Directory Service Changes successes.
AU-12 - Medium - CCI-000172 - V-205793 - SV-205793r852494_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-DC-000260
Vuln IDs
  • V-205793
  • V-93137
Rule IDs
  • SV-205793r852494_rule
  • SV-103225
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Audit Directory Service Changes records events related to changes made to objects in Active Directory Domain Services. Satisfies: SRG-OS-000327-GPOS-00127, SRG-OS-000458-GPOS-00203, SRG-OS-000463-GPOS-00207, SRG-OS-000468-GPOS-00212
Checks: C-6058r355741_chk

This applies to domain controllers. It is NA for other systems. Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. DS Access >> Directory Service Changes - Success

Fix: F-6058r355742_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> DS Access >> "Directory Service Changes" with "Success" selected.

b
Windows Server 2019 account lockout duration must be configured to 15 minutes or greater.
AC-7 - Medium - CCI-002238 - V-205795 - SV-205795r852496_rule
RMF Control
AC-7
Severity
Medium
CCI
CCI-002238
Version
WN19-AC-000010
Vuln IDs
  • V-205795
  • V-93145
Rule IDs
  • SV-205795r852496_rule
  • SV-103233
The account lockout feature, when enabled, prevents brute-force password attacks on the system. This parameter specifies the period of time that an account will remain locked after the specified number of failed logon attempts.
Checks: C-6060r355747_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Account Lockout Policy. If the "Account lockout duration" is less than "15" minutes (excluding "0"), this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "LockoutDuration" is less than "15" (excluding "0") in the file, this is a finding. Configuring this to "0", requiring an administrator to unlock the account, is more restrictive and is not a finding.

Fix: F-6060r355748_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Account Policies >> Account Lockout Policy >> "Account lockout duration" to "15" minutes or greater. A value of "0" is also acceptable, requiring an administrator to unlock the account.

b
Windows Server 2019 Application event log size must be configured to 32768 KB or greater.
AU-4 - Medium - CCI-001849 - V-205796 - SV-205796r877391_rule
RMF Control
AU-4
Severity
Medium
CCI
CCI-001849
Version
WN19-CC-000270
Vuln IDs
  • V-205796
  • V-93177
Rule IDs
  • SV-205796r877391_rule
  • SV-103265
Inadequate log size will cause the log to fill up quickly. This may prevent audit events from being recorded properly and require frequent attention by administrative personnel.
Checks: C-6061r355750_chk

If the system is configured to write events directly to an audit server, this is NA. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\EventLog\Application\ Value Name: MaxSize Type: REG_DWORD Value: 0x00008000 (32768) (or greater)

Fix: F-6061r355751_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Event Log Service >> Application >> "Specify the maximum log file size (KB)" to "Enabled" with a "Maximum Log Size (KB)" of "32768" or greater.

b
Windows Server 2019 Security event log size must be configured to 196608 KB or greater.
AU-4 - Medium - CCI-001849 - V-205797 - SV-205797r877391_rule
RMF Control
AU-4
Severity
Medium
CCI
CCI-001849
Version
WN19-CC-000280
Vuln IDs
  • V-205797
  • V-93179
Rule IDs
  • SV-205797r877391_rule
  • SV-103267
Inadequate log size will cause the log to fill up quickly. This may prevent audit events from being recorded properly and require frequent attention by administrative personnel.
Checks: C-6062r355753_chk

If the system is configured to write events directly to an audit server, this is NA. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\EventLog\Security\ Value Name: MaxSize Type: REG_DWORD Value: 0x00030000 (196608) (or greater)

Fix: F-6062r355754_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Event Log Service >> Security >> "Specify the maximum log file size (KB)" to "Enabled" with a "Maximum Log Size (KB)" of "196608" or greater.

b
Windows Server 2019 System event log size must be configured to 32768 KB or greater.
AU-4 - Medium - CCI-001849 - V-205798 - SV-205798r877391_rule
RMF Control
AU-4
Severity
Medium
CCI
CCI-001849
Version
WN19-CC-000290
Vuln IDs
  • V-205798
  • V-93181
Rule IDs
  • SV-205798r877391_rule
  • SV-103269
Inadequate log size will cause the log to fill up quickly. This may prevent audit events from being recorded properly and require frequent attention by administrative personnel.
Checks: C-6063r355756_chk

If the system is configured to write events directly to an audit server, this is NA. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\EventLog\System\ Value Name: MaxSize Type: REG_DWORD Value: 0x00008000 (32768) (or greater)

Fix: F-6063r355757_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Event Log Service >> System >> "Specify the maximum log file size (KB)" to "Enabled" with a "Maximum Log Size (KB)" of "32768" or greater.

b
Windows Server 2019 audit records must be backed up to a different system or media than the system being audited.
AU-4 - Medium - CCI-001851 - V-205799 - SV-205799r877390_rule
RMF Control
AU-4
Severity
Medium
CCI
CCI-001851
Version
WN19-AU-000010
Vuln IDs
  • V-205799
  • V-93183
Rule IDs
  • SV-205799r877390_rule
  • SV-103271
Protection of log data includes assuring the log data is not accidentally lost or deleted. Audit information stored in one location is vulnerable to accidental or incidental deletion or alteration.
Checks: C-6064r355759_chk

Determine if a process to back up log data to a different system or media than the system being audited has been implemented. If it has not, this is a finding.

Fix: F-6064r355760_fix

Establish and implement a process for backing up log data to another system or media other than the system being audited.

a
The Windows Server 2019 time service must synchronize with an appropriate DOD time source.
AU-8 - Low - CCI-001891 - V-205800 - SV-205800r921953_rule
RMF Control
AU-8
Severity
Low
CCI
CCI-001891
Version
WN19-00-000440
Vuln IDs
  • V-205800
  • V-93187
Rule IDs
  • SV-205800r921953_rule
  • SV-103275
The Windows Time Service controls time synchronization settings. Time synchronization is essential for authentication and auditing purposes. If the Windows Time Service is used, it must synchronize with a secure, authorized time source. Domain-joined systems are automatically configured to synchronize with domain controllers. If an NTP server is configured, it must synchronize with a secure, authorized time source.
Checks: C-6065r921951_chk

Review the Windows time service configuration. Open an elevated "Command Prompt" (run as administrator). Enter "W32tm /query /configuration". Domain-joined systems (excluding the domain controller with the PDC emulator role): If the value for "Type" under "NTP Client" is not "NT5DS", this is a finding. Other systems: If systems are configured with a "Type" of "NTP", including standalone or nondomain-joined systems and the domain controller with the PDC Emulator role, and do not have a DOD time server defined for "NTPServer", this is a finding. To determine the domain controller with the PDC Emulator role: Open "PowerShell". Enter "Get-ADDomain | FT PDCEmulator".

Fix: F-6065r921952_fix

Configure the system to synchronize time with an appropriate DOD time source. Domain-joined systems use NT5DS to synchronize time from other systems in the domain by default. If the system needs to be configured to an NTP server, configure the system to point to an authorized time server by setting the policy value for Computer Configuration >> Administrative Templates >> System >> Windows Time Service >> Time Providers >> "Configure Windows NTP Client" to "Enabled", and configure the "NtpServer" field to point to an appropriate DOD time server. The US Naval Observatory operates stratum 1 time servers, which are identified at: https://www.cnmoc.usff.navy.mil/Our-Commands/United-States-Naval-Observatory/Precise-Time-Department/Network-Time-Protocol-NTP/ Time synchronization will occur through a hierarchy of time servers down to the local level. Clients and lower-level servers will synchronize with an authorized time server in the hierarchy.

b
Windows Server 2019 must prevent users from changing installation options.
CM-11 - Medium - CCI-001812 - V-205801 - SV-205801r852502_rule
RMF Control
CM-11
Severity
Medium
CCI
CCI-001812
Version
WN19-CC-000420
Vuln IDs
  • V-205801
  • V-93199
Rule IDs
  • SV-205801r852502_rule
  • SV-103287
Installation options for applications are typically controlled by administrators. This setting prevents users from changing installation options that may bypass security features.
Checks: C-6066r355765_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Installer\ Value Name: EnableUserControl Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6066r355766_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Installer >> "Allow user control over installs" to "Disabled".

c
Windows Server 2019 must disable the Windows Installer Always install with elevated privileges option.
CM-11 - High - CCI-001812 - V-205802 - SV-205802r852503_rule
RMF Control
CM-11
Severity
High
CCI
CCI-001812
Version
WN19-CC-000430
Vuln IDs
  • V-205802
  • V-93201
Rule IDs
  • SV-205802r852503_rule
  • SV-103289
Standard user accounts must not be granted elevated privileges. Enabling Windows Installer to elevate privileges when installing applications can allow malicious persons and applications to gain full control of a system.
Checks: C-6067r355768_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Installer\ Value Name: AlwaysInstallElevated Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6067r355769_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Installer >> "Always install with elevated privileges" to "Disabled".

b
Windows Server 2019 system files must be monitored for unauthorized changes.
CM-3 - Medium - CCI-001744 - V-205803 - SV-205803r890522_rule
RMF Control
CM-3
Severity
Medium
CCI
CCI-001744
Version
WN19-00-000220
Vuln IDs
  • V-205803
  • V-93203
Rule IDs
  • SV-205803r890522_rule
  • SV-103291
Monitoring system files for changes against a baseline on a regular basis may help detect the possible introduction of malicious code on a system.
Checks: C-6068r890521_chk

Determine whether the system is monitored for unauthorized changes to system files (e.g., *.exe, *.bat, *.com, *.cmd, and *.dll) against a baseline on a weekly basis. If system files are not monitored for unauthorized changes, this is a finding. An approved and properly configured solution will contain both a list of baselines that includes all system file locations and a file comparison task that is scheduled to run at least weekly.

Fix: F-6068r355772_fix

Monitor the system for unauthorized changes to system files (e.g., *.exe, *.bat, *.com, *.cmd, and *.dll) against a baseline on a weekly basis. This can be done with the use of various monitoring tools.

c
Windows Server 2019 Autoplay must be turned off for non-volume devices.
CM-7 - High - CCI-001764 - V-205804 - SV-205804r852506_rule
RMF Control
CM-7
Severity
High
CCI
CCI-001764
Version
WN19-CC-000210
Vuln IDs
  • V-205804
  • V-93373
Rule IDs
  • SV-205804r852506_rule
  • SV-103459
Allowing AutoPlay to execute may introduce malicious code to a system. AutoPlay begins reading from a drive as soon as media is inserted into the drive. As a result, the setup file of programs or music on audio media may start. This setting will disable AutoPlay for non-volume devices, such as Media Transfer Protocol (MTP) devices.
Checks: C-6069r355774_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Explorer\ Value Name: NoAutoplayfornonVolume Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6069r355775_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> AutoPlay Policies >> "Disallow Autoplay for non-volume devices" to "Enabled".

c
Windows Server 2019 default AutoRun behavior must be configured to prevent AutoRun commands.
CM-7 - High - CCI-001764 - V-205805 - SV-205805r852507_rule
RMF Control
CM-7
Severity
High
CCI
CCI-001764
Version
WN19-CC-000220
Vuln IDs
  • V-205805
  • V-93375
Rule IDs
  • SV-205805r852507_rule
  • SV-103461
Allowing AutoRun commands to execute may introduce malicious code to a system. Configuring this setting prevents AutoRun commands from executing.
Checks: C-6070r355777_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\ Value Name: NoAutorun Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6070r355778_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> AutoPlay Policies >> "Set the default behavior for AutoRun" to "Enabled" with "Do not execute any autorun commands" selected.

c
Windows Server 2019 AutoPlay must be disabled for all drives.
CM-7 - High - CCI-001764 - V-205806 - SV-205806r852508_rule
RMF Control
CM-7
Severity
High
CCI
CCI-001764
Version
WN19-CC-000230
Vuln IDs
  • V-205806
  • V-93377
Rule IDs
  • SV-205806r852508_rule
  • SV-103463
Allowing AutoPlay to execute may introduce malicious code to a system. AutoPlay begins reading from a drive as soon media is inserted into the drive. As a result, the setup file of programs or music on audio media may start. By default, AutoPlay is disabled on removable drives, such as the floppy disk drive (but not the CD-ROM drive) and on network drives. Enabling this policy disables AutoPlay on all drives.
Checks: C-6071r355780_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\ Value Name: NoDriveTypeAutoRun Type: REG_DWORD Value: 0x000000ff (255)

Fix: F-6071r355781_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> AutoPlay Policies >> "Turn off AutoPlay" to "Enabled" with "All Drives" selected.

b
Windows Server 2019 must employ a deny-all, permit-by-exception policy to allow the execution of authorized software programs.
CM-7 - Medium - CCI-001774 - V-205807 - SV-205807r890520_rule
RMF Control
CM-7
Severity
Medium
CCI
CCI-001774
Version
WN19-00-000080
Vuln IDs
  • V-205807
  • V-93379
Rule IDs
  • SV-205807r890520_rule
  • SV-103465
Using an allowlist provides a configuration management method to allow the execution of only authorized software. Using only authorized software decreases risk by limiting the number of potential vulnerabilities. The organization must identify authorized software programs and only permit execution of authorized software. The process used to identify software programs that are authorized to execute on organizational information systems is commonly referred to as allowlisting.
Checks: C-6072r890518_chk

Verify the operating system employs a deny-all, permit-by-exception policy to allow the execution of authorized software programs. If an application allowlisting program is not in use on the system, this is a finding. Configuration of allowlisting applications will vary by the program. AppLocker is an allowlisting application built into Windows Server. A deny-by-default implementation is initiated by enabling any AppLocker rules within a category, only allowing what is specified by defined rules. If AppLocker is used, perform the following to view the configuration of AppLocker: Open "PowerShell". If the AppLocker PowerShell module has not been imported previously, execute the following first: Import-Module AppLocker Execute the following command, substituting [c:\temp\file.xml] with a location and file name appropriate for the system: Get-AppLockerPolicy -Effective -XML > c:\temp\file.xml This will produce an xml file with the effective settings that can be viewed in a browser or opened in a program such as Excel for review. Implementation guidance for AppLocker is available at the following link: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/applocker/applocker-policies-deployment-guide

Fix: F-6072r890519_fix

Configure an application allowlisting program to employ a deny-all, permit-by-exception policy to allow the execution of authorized software programs. Configuration of allowlisting applications will vary by the program. AppLocker is an allowlisting application built into Windows Server. If AppLocker is used, it is configured through group policy in Computer Configuration >> Windows Settings >> Security Settings >> Application Control Policies >> AppLocker. Implementation guidance for AppLocker is available at the following link: https://docs.microsoft.com/en-us/windows/security/threat-protection/windows-defender-application-control/applocker/applocker-policies-deployment-guide

b
Windows Server 2019 must not save passwords in the Remote Desktop Client.
IA-11 - Medium - CCI-002038 - V-205808 - SV-205808r852510_rule
RMF Control
IA-11
Severity
Medium
CCI
CCI-002038
Version
WN19-CC-000340
Vuln IDs
  • V-205808
  • V-93425
Rule IDs
  • SV-205808r852510_rule
  • SV-103511
Saving passwords in the Remote Desktop Client could allow an unauthorized user to establish a remote desktop session to another system. The system must be configured to prevent users from saving passwords in the Remote Desktop Client. Satisfies: SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPOS-00156
Checks: C-6073r355786_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\ Value Name: DisablePasswordSaving Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6073r355787_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Remote Desktop Services >> Remote Desktop Connection Client >> "Do not allow passwords to be saved" to "Enabled".

b
Windows Server 2019 Remote Desktop Services must always prompt a client for passwords upon connection.
IA-11 - Medium - CCI-002038 - V-205809 - SV-205809r852511_rule
RMF Control
IA-11
Severity
Medium
CCI
CCI-002038
Version
WN19-CC-000360
Vuln IDs
  • V-205809
  • V-93427
Rule IDs
  • SV-205809r852511_rule
  • SV-103513
This setting controls the ability of users to supply passwords automatically as part of their remote desktop connection. Disabling this setting would allow anyone to use the stored credentials in a connection item to connect to the terminal server. Satisfies: SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPOS-00156
Checks: C-6074r355789_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows NT\Terminal Services\ Value Name: fPromptForPassword Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6074r355790_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Remote Desktop Services >> Remote Desktop Session Host >> Security >> "Always prompt for password upon connection" to "Enabled".

b
Windows Server 2019 Windows Remote Management (WinRM) service must not store RunAs credentials.
IA-11 - Medium - CCI-002038 - V-205810 - SV-205810r852512_rule
RMF Control
IA-11
Severity
Medium
CCI
CCI-002038
Version
WN19-CC-000520
Vuln IDs
  • V-205810
  • V-93429
Rule IDs
  • SV-205810r852512_rule
  • SV-103515
Storage of administrative credentials could allow unauthorized access. Disallowing the storage of RunAs credentials for Windows Remote Management will prevent them from being used with plug-ins. Satisfies: SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPOS-00156
Checks: C-6075r355792_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\WinRM\Service\ Value Name: DisableRunAs Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6075r355793_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Remote Management (WinRM) >> WinRM Service >> "Disallow WinRM from storing RunAs credentials" to "Enabled".

b
Windows Server 2019 User Account Control approval mode for the built-in Administrator must be enabled.
IA-11 - Medium - CCI-002038 - V-205811 - SV-205811r852513_rule
RMF Control
IA-11
Severity
Medium
CCI
CCI-002038
Version
WN19-SO-000380
Vuln IDs
  • V-205811
  • V-93431
Rule IDs
  • SV-205811r852513_rule
  • SV-103517
User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting configures the built-in Administrator account so that it runs in Admin Approval Mode. Satisfies: SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPOS-00156
Checks: C-6076r355795_chk

UAC requirements are NA for Server Core installations (this is the default installation option for Windows Server 2019 versus Server with Desktop Experience). If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: FilterAdministratorToken Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6076r355796_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "User Account Control: Admin Approval Mode for the Built-in Administrator account" to "Enabled".

b
Windows Server 2019 User Account Control must automatically deny standard user requests for elevation.
IA-11 - Medium - CCI-002038 - V-205812 - SV-205812r852514_rule
RMF Control
IA-11
Severity
Medium
CCI
CCI-002038
Version
WN19-SO-000410
Vuln IDs
  • V-205812
  • V-93433
Rule IDs
  • SV-205812r852514_rule
  • SV-103519
User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting controls the behavior of elevation when requested by a standard user account. Satisfies: SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPOS-00156
Checks: C-6077r355798_chk

UAC requirements are NA for Server Core installations (this is the default installation option for Windows Server 2019 versus Server with Desktop Experience). If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: ConsentPromptBehaviorUser Value Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6077r355799_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "User Account Control: Behavior of the elevation prompt for standard users" to "Automatically deny elevation requests".

b
Windows Server 2019 User Account Control must run all administrators in Admin Approval Mode, enabling UAC.
IA-11 - Medium - CCI-002038 - V-205813 - SV-205813r852515_rule
RMF Control
IA-11
Severity
Medium
CCI
CCI-002038
Version
WN19-SO-000440
Vuln IDs
  • V-205813
  • V-93435
Rule IDs
  • SV-205813r852515_rule
  • SV-103521
User Account Control (UAC) is a security mechanism for limiting the elevation of privileges, including administrative accounts, unless authorized. This setting enables UAC. Satisfies: SRG-OS-000373-GPOS-00157, SRG-OS-000373-GPOS-00156
Checks: C-6078r355801_chk

UAC requirements are NA for Server Core installations (this is the default installation option for Windows Server 2019 versus Server with Desktop Experience). If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: EnableLUA Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6078r355802_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "User Account Control: Run all administrators in Admin Approval Mode" to "Enabled".

b
Windows Server 2019 must restrict unauthenticated Remote Procedure Call (RPC) clients from connecting to the RPC server on domain-joined member servers and standalone or nondomain-joined systems.
IA-3 - Medium - CCI-001967 - V-205814 - SV-205814r877039_rule
RMF Control
IA-3
Severity
Medium
CCI
CCI-001967
Version
WN19-MS-000040
Vuln IDs
  • V-205814
  • V-93453
Rule IDs
  • SV-205814r877039_rule
  • SV-103539
Unauthenticated RPC clients may allow anonymous access to sensitive information. Configuring RPC to restrict unauthenticated RPC clients from connecting to the RPC server will prevent anonymous connections.
Checks: C-6079r857323_chk

This applies to member servers and standalone or nondomain-joined systems. It is NA for domain controllers. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows NT\Rpc\ Value Name: RestrictRemoteClients Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6079r355805_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Remote Procedure Call >> "Restrict Unauthenticated RPC clients" to "Enabled" with "Authenticated" selected.

b
Windows Server 2019 computer account password must not be prevented from being reset.
IA-3 - Medium - CCI-001967 - V-205815 - SV-205815r877039_rule
RMF Control
IA-3
Severity
Medium
CCI
CCI-001967
Version
WN19-SO-000090
Vuln IDs
  • V-205815
  • V-93455
Rule IDs
  • SV-205815r877039_rule
  • SV-103541
Computer account passwords are changed automatically on a regular basis. Disabling automatic password changes can make the system more vulnerable to malicious access. Frequent password changes can be a significant safeguard for the system. A new password for the computer account will be generated every 30 days.
Checks: C-6080r355807_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Netlogon\Parameters\ Value Name: DisablePasswordChange Value Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6080r355808_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Domain member: Disable machine account password changes" to "Disabled".

b
Windows Server 2019 Windows Remote Management (WinRM) client must not allow unencrypted traffic.
MA-4 - Medium - CCI-002890 - V-205816 - SV-205816r877382_rule
RMF Control
MA-4
Severity
Medium
CCI
CCI-002890
Version
WN19-CC-000480
Vuln IDs
  • V-205816
  • V-93499
Rule IDs
  • SV-205816r877382_rule
  • SV-103585
Unencrypted remote access to a system can allow sensitive information to be compromised. Windows remote management connections must be encrypted to prevent this. Satisfies: SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174
Checks: C-6081r355810_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\WinRM\Client\ Value Name: AllowUnencryptedTraffic Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6081r355811_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Remote Management (WinRM) >> WinRM Client >> "Allow unencrypted traffic" to "Disabled".

b
Windows Server 2019 Windows Remote Management (WinRM) service must not allow unencrypted traffic.
MA-4 - Medium - CCI-002890 - V-205817 - SV-205817r877382_rule
RMF Control
MA-4
Severity
Medium
CCI
CCI-002890
Version
WN19-CC-000510
Vuln IDs
  • V-205817
  • V-93501
Rule IDs
  • SV-205817r877382_rule
  • SV-103587
Unencrypted remote access to a system can allow sensitive information to be compromised. Windows remote management connections must be encrypted to prevent this. Satisfies: SRG-OS-000393-GPOS-00173, SRG-OS-000394-GPOS-00174
Checks: C-6082r355813_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\WinRM\Service\ Value Name: AllowUnencryptedTraffic Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6082r355814_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Remote Management (WinRM) >> WinRM Service >> "Allow unencrypted traffic" to "Disabled".

b
Windows Server 2019 must use separate, NSA-approved (Type 1) cryptography to protect the directory data in transit for directory service implementations at a classified confidentiality level when replication data traverses a network cleared to a lower level than the data.
SC-13 - Medium - CCI-002450 - V-205818 - SV-205818r877380_rule
RMF Control
SC-13
Severity
Medium
CCI
CCI-002450
Version
WN19-DC-000140
Vuln IDs
  • V-205818
  • V-93513
Rule IDs
  • SV-205818r877380_rule
  • SV-103599
Directory data that is not appropriately encrypted is subject to compromise. Commercial-grade encryption does not provide adequate protection when the classification level of directory data in transit is higher than the level of the network.
Checks: C-6083r355816_chk

This applies to domain controllers. It is NA for other systems. Review the organization network diagram(s) or documentation to determine the level of classification for the network(s) over which replication data is transmitted. Determine the classification level of the Windows domain controller. If the classification level of the Windows domain controller is higher than the level of the networks, review the organization network diagram(s) and directory implementation documentation to determine if NSA-approved encryption is used to protect the replication network traffic. If the classification level of the Windows domain controller is higher than the level of the network traversed and NSA-approved encryption is not used, this is a finding.

Fix: F-6083r355817_fix

Configure NSA-approved (Type 1) cryptography to protect the directory data in transit for directory service implementations at a classified confidentiality level that transfer replication data through a network cleared to a lower level than the data.

a
Windows Server 2019 must be configured to ignore NetBIOS name release requests except from WINS servers.
SC-5 - Low - CCI-002385 - V-205819 - SV-205819r852521_rule
RMF Control
SC-5
Severity
Low
CCI
CCI-002385
Version
WN19-CC-000060
Vuln IDs
  • V-205819
  • V-93541
Rule IDs
  • SV-205819r852521_rule
  • SV-103627
Configuring the system to ignore name release requests, except from WINS servers, prevents a denial of service (DoS) attack. The DoS consists of sending a NetBIOS name release request to the server for each entry in the server's cache, causing a response delay in the normal operation of the server's WINS resolution capability.
Checks: C-6084r355819_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Netbt\Parameters\ Value Name: NoNameReleaseOnDemand Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6084r355820_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> MSS (Legacy) >> "MSS: (NoNameReleaseOnDemand) Allow the computer to ignore NetBIOS name release requests except from WINS servers" to "Enabled". This policy setting requires the installation of the MSS-Legacy custom templates included with the STIG package. "MSS-Legacy.admx" and "MSS-Legacy.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.

b
Windows Server 2019 domain controllers must require LDAP access signing.
SC-8 - Medium - CCI-002418 - V-205820 - SV-205820r916422_rule
RMF Control
SC-8
Severity
Medium
CCI
CCI-002418
Version
WN19-DC-000320
Vuln IDs
  • V-205820
  • V-93545
Rule IDs
  • SV-205820r916422_rule
  • SV-103631
Unsigned network traffic is susceptible to man-in-the-middle attacks, where an intruder captures packets between the server and the client and modifies them before forwarding them to the client. In the case of an LDAP server, this means that an attacker could cause a client to make decisions based on false records from the LDAP directory. The risk of an attacker pulling this off can be decreased by implementing strong physical security measures to protect the network infrastructure. Furthermore, implementing Internet Protocol security (IPsec) authentication header mode (AH), which performs mutual authentication and packet integrity for Internet Protocol (IP) traffic, can make all types of man-in-the-middle attacks extremely difficult. Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188
Checks: C-6085r355822_chk

This applies to domain controllers. It is NA for other systems. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\NTDS\Parameters\ Value Name: LDAPServerIntegrity Value Type: REG_DWORD Value: 0x00000002 (2)

Fix: F-6085r355823_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Domain controller: LDAP server signing requirements" to "Require signing".

b
Windows Server 2019 setting Domain member: Digitally encrypt or sign secure channel data (always) must be configured to Enabled.
SC-8 - Medium - CCI-002418 - V-205821 - SV-205821r916422_rule
RMF Control
SC-8
Severity
Medium
CCI
CCI-002418
Version
WN19-SO-000060
Vuln IDs
  • V-205821
  • V-93547
Rule IDs
  • SV-205821r916422_rule
  • SV-103633
Requests sent on the secure channel are authenticated, and sensitive information (such as passwords) is encrypted, but not all information is encrypted. If this policy is enabled, outgoing secure channel traffic will be encrypted and signed. Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188
Checks: C-6086r355825_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Netlogon\Parameters\ Value Name: RequireSignOrSeal Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6086r355826_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Domain member: Digitally encrypt or sign secure channel data (always)" to "Enabled".

b
Windows Server 2019 setting Domain member: Digitally encrypt secure channel data (when possible) must be configured to enabled.
SC-8 - Medium - CCI-002418 - V-205822 - SV-205822r916422_rule
RMF Control
SC-8
Severity
Medium
CCI
CCI-002418
Version
WN19-SO-000070
Vuln IDs
  • V-205822
  • V-93549
Rule IDs
  • SV-205822r916422_rule
  • SV-103635
Requests sent on the secure channel are authenticated, and sensitive information (such as passwords) is encrypted, but not all information is encrypted. If this policy is enabled, outgoing secure channel traffic will be encrypted. Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188
Checks: C-6087r355828_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Netlogon\Parameters\ Value Name: SealSecureChannel Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6087r355829_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Domain member: Digitally encrypt secure channel data (when possible)" to "Enabled".

b
Windows Server 2019 setting Domain member: Digitally sign secure channel data (when possible) must be configured to Enabled.
SC-8 - Medium - CCI-002418 - V-205823 - SV-205823r916422_rule
RMF Control
SC-8
Severity
Medium
CCI
CCI-002418
Version
WN19-SO-000080
Vuln IDs
  • V-205823
  • V-93551
Rule IDs
  • SV-205823r916422_rule
  • SV-103637
Requests sent on the secure channel are authenticated, and sensitive information (such as passwords) is encrypted, but the channel is not integrity checked. If this policy is enabled, outgoing secure channel traffic will be signed. Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188
Checks: C-6088r355831_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Netlogon\Parameters\ Value Name: SignSecureChannel Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6088r355832_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Domain member: Digitally sign secure channel data (when possible)" to "Enabled".

b
Windows Server 2019 must be configured to require a strong session key.
SC-8 - Medium - CCI-002418 - V-205824 - SV-205824r916422_rule
RMF Control
SC-8
Severity
Medium
CCI
CCI-002418
Version
WN19-SO-000110
Vuln IDs
  • V-205824
  • V-93553
Rule IDs
  • SV-205824r916422_rule
  • SV-103639
A computer connecting to a domain controller will establish a secure channel. The secure channel connection may be subject to compromise, such as hijacking or eavesdropping, if strong session keys are not used to establish the connection. Requiring strong session keys enforces 128-bit encryption between systems. Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188
Checks: C-6089r355834_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Netlogon\Parameters\ Value Name: RequireStrongKey Value Type: REG_DWORD Value: 0x00000001 (1) This setting may prevent a system from being joined to a domain if not configured consistently between systems.

Fix: F-6089r355835_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Domain member: Require strong (Windows 2000 or Later) session key" to "Enabled".

b
Windows Server 2019 setting Microsoft network client: Digitally sign communications (always) must be configured to Enabled.
SC-8 - Medium - CCI-002418 - V-205825 - SV-205825r916422_rule
RMF Control
SC-8
Severity
Medium
CCI
CCI-002418
Version
WN19-SO-000160
Vuln IDs
  • V-205825
  • V-93555
Rule IDs
  • SV-205825r916422_rule
  • SV-103641
The server message block (SMB) protocol provides the basis for many network operations. Digitally signed SMB packets aid in preventing man-in-the-middle attacks. If this policy is enabled, the SMB client will only communicate with an SMB server that performs SMB packet signing. Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188
Checks: C-6090r355837_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters\ Value Name: RequireSecuritySignature Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6090r355838_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Microsoft network client: Digitally sign communications (always)" to "Enabled".

b
Windows Server 2019 setting Microsoft network client: Digitally sign communications (if server agrees) must be configured to Enabled.
SC-8 - Medium - CCI-002418 - V-205826 - SV-205826r916422_rule
RMF Control
SC-8
Severity
Medium
CCI
CCI-002418
Version
WN19-SO-000170
Vuln IDs
  • V-205826
  • V-93557
Rule IDs
  • SV-205826r916422_rule
  • SV-103643
The server message block (SMB) protocol provides the basis for many network operations. If this policy is enabled, the SMB client will request packet signing when communicating with an SMB server that is enabled or required to perform SMB packet signing. Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188
Checks: C-6091r355840_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\LanmanWorkstation\Parameters\ Value Name: EnableSecuritySignature Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6091r355841_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Microsoft network client: Digitally sign communications (if server agrees)" to "Enabled".

b
Windows Server 2019 setting Microsoft network server: Digitally sign communications (always) must be configured to Enabled.
SC-8 - Medium - CCI-002418 - V-205827 - SV-205827r916422_rule
RMF Control
SC-8
Severity
Medium
CCI
CCI-002418
Version
WN19-SO-000190
Vuln IDs
  • V-205827
  • V-93559
Rule IDs
  • SV-205827r916422_rule
  • SV-103645
The server message block (SMB) protocol provides the basis for many network operations. Digitally signed SMB packets aid in preventing man-in-the-middle attacks. If this policy is enabled, the SMB server will only communicate with an SMB client that performs SMB packet signing. Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188
Checks: C-6092r355843_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\LanManServer\Parameters\ Value Name: RequireSecuritySignature Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6092r355844_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Microsoft network server: Digitally sign communications (always)" to "Enabled".

b
Windows Server 2019 setting Microsoft network server: Digitally sign communications (if client agrees) must be configured to Enabled.
SC-8 - Medium - CCI-002418 - V-205828 - SV-205828r916422_rule
RMF Control
SC-8
Severity
Medium
CCI
CCI-002418
Version
WN19-SO-000200
Vuln IDs
  • V-205828
  • V-93561
Rule IDs
  • SV-205828r916422_rule
  • SV-103647
The server message block (SMB) protocol provides the basis for many network operations. Digitally signed SMB packets aid in preventing man-in-the-middle attacks. If this policy is enabled, the SMB server will negotiate SMB packet signing as requested by the client. Satisfies: SRG-OS-000423-GPOS-00187, SRG-OS-000424-GPOS-00188
Checks: C-6093r355846_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\LanManServer\Parameters\ Value Name: EnableSecuritySignature Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6093r355847_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Microsoft network server: Digitally sign communications (if client agrees)" to "Enabled".

b
Windows Server 2019 must implement protection methods such as TLS, encrypted VPNs, or IPsec if the data owner has a strict requirement for ensuring data integrity and confidentiality is maintained at every step of the data transfer and handling process.
SC-8 - Medium - CCI-002420 - V-205829 - SV-205829r852531_rule
RMF Control
SC-8
Severity
Medium
CCI
CCI-002420
Version
WN19-00-000260
Vuln IDs
  • V-205829
  • V-93543
Rule IDs
  • SV-205829r852531_rule
  • SV-103629
Information can be either unintentionally or maliciously disclosed or modified during preparation for transmission, for example, during aggregation, at protocol transformation points, and during packing/unpacking. These unauthorized disclosures or modifications compromise the confidentiality or integrity of the information. Ensuring the confidentiality of transmitted information requires the operating system to take measures in preparing information for transmission. This can be accomplished via access control and encryption. Use of this requirement will be limited to situations where the data owner has a strict requirement for ensuring data integrity and confidentiality is maintained at every step of the data transfer and handling process. When transmitting data, operating systems need to support transmission protection mechanisms such as TLS, encrypted VPNs, or IPsec. Satisfies: SRG-OS-000425-GPOS-00189, SRG-OS-000426-GPOS-00190
Checks: C-6094r355849_chk

If the data owner has a strict requirement for ensuring data integrity and confidentiality is maintained at every step of the data transfer and handling process, verify protection methods such as TLS, encrypted VPNs, or IPsec have been implemented. If protection methods have not been implemented, this is a finding.

Fix: F-6094r355850_fix

Configure protection methods such as TLS, encrypted VPNs, or IPsec when the data owner has a strict requirement for ensuring data integrity and confidentiality is maintained at every step of the data transfer and handling process.

b
Windows Server 2019 Explorer Data Execution Prevention must be enabled.
SI-16 - Medium - CCI-002824 - V-205830 - SV-205830r852532_rule
RMF Control
SI-16
Severity
Medium
CCI
CCI-002824
Version
WN19-CC-000310
Vuln IDs
  • V-205830
  • V-93563
Rule IDs
  • SV-205830r852532_rule
  • SV-103649
Data Execution Prevention provides additional protection by performing checks on memory to help prevent malicious code from running. This setting will prevent Data Execution Prevention from being turned off for File Explorer.
Checks: C-6095r355852_chk

The default behavior is for Data Execution Prevention to be turned on for File Explorer. If the registry value name below does not exist, this is not a finding. If it exists and is configured with a value of "0", this is not a finding. If it exists and is configured with a value of "1", this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Explorer\ Value Name: NoDataExecutionPrevention Value Type: REG_DWORD Value: 0x00000000 (0) (or if the Value Name does not exist)

Fix: F-6095r355853_fix

The default behavior is for data execution prevention to be turned on for File Explorer. If this needs to be corrected, configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> File Explorer >> "Turn off Data Execution Prevention for Explorer" to "Not Configured" or "Disabled".

b
Windows Server 2019 must be configured to audit Account Logon - Credential Validation successes.
AU-12 - Medium - CCI-000172 - V-205832 - SV-205832r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000070
Vuln IDs
  • V-205832
  • V-93153
Rule IDs
  • SV-205832r569188_rule
  • SV-103241
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Credential Validation records events related to validation tests on credentials for a user account logon.
Checks: C-6097r355858_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Account Logon >> Credential Validation - Success

Fix: F-6097r355859_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Account Logon >> "Audit Credential Validation" with "Success" selected.

b
Windows Server 2019 must be configured to audit Account Logon - Credential Validation failures.
AU-12 - Medium - CCI-000172 - V-205833 - SV-205833r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000080
Vuln IDs
  • V-205833
  • V-93155
Rule IDs
  • SV-205833r569188_rule
  • SV-103243
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Credential Validation records events related to validation tests on credentials for a user account logon.
Checks: C-6098r355861_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Account Logon >> Credential Validation - Failure

Fix: F-6098r355862_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Account Logon >> "Audit Credential Validation" with "Failure" selected.

b
Windows Server 2019 must be configured to audit Logon/Logoff - Group Membership successes.
AU-12 - Medium - CCI-000172 - V-205834 - SV-205834r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000170
Vuln IDs
  • V-205834
  • V-93159
Rule IDs
  • SV-205834r569188_rule
  • SV-103247
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Audit Group Membership records information related to the group membership of a user's logon token.
Checks: C-6099r355864_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Logon/Logoff >> Group Membership - Success

Fix: F-6099r355865_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Logon/Logoff >> "Audit Group Membership" with "Success" selected.

b
Windows Server 2019 must be configured to audit Logon/Logoff - Special Logon successes.
AU-12 - Medium - CCI-000172 - V-205835 - SV-205835r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000210
Vuln IDs
  • V-205835
  • V-93161
Rule IDs
  • SV-205835r569188_rule
  • SV-103249
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Special Logon records special logons that have administrative privileges and can be used to elevate processes. Satisfies: SRG-OS-000470-GPOS-00214, SRG-OS-000472-GPOS-00217, SRG-OS-000473-GPOS-00218, SRG-OS-000475-GPOS-00220
Checks: C-6100r355867_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Logon/Logoff >> Special Logon - Success

Fix: F-6100r355868_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Logon/Logoff >> "Audit Special Logon" with "Success" selected.

b
Windows Server 2019 must be configured to audit Object Access - Other Object Access Events successes.
AU-12 - Medium - CCI-000172 - V-205836 - SV-205836r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000220
Vuln IDs
  • V-205836
  • V-93163
Rule IDs
  • SV-205836r569188_rule
  • SV-103251
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Auditing for other object access records events related to the management of task scheduler jobs and COM+ objects.
Checks: C-6101r355870_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Object Access >> Other Object Access Events - Success

Fix: F-6101r355871_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Object Access >> "Audit Other Object Access Events" with "Success" selected.

b
Windows Server 2019 must be configured to audit Object Access - Other Object Access Events failures.
AU-12 - Medium - CCI-000172 - V-205837 - SV-205837r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000230
Vuln IDs
  • V-205837
  • V-93165
Rule IDs
  • SV-205837r569188_rule
  • SV-103253
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Auditing for other object access records events related to the management of task scheduler jobs and COM+ objects.
Checks: C-6102r355873_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Object Access >> Other Object Access Events - Failure

Fix: F-6102r355874_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Object Access >> "Audit Other Object Access Events" with "Failure" selected.

b
Windows Server 2019 must be configured to audit logoff successes.
AU-12 - Medium - CCI-000172 - V-205838 - SV-205838r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000180
Vuln IDs
  • V-205838
  • V-93171
Rule IDs
  • SV-205838r569188_rule
  • SV-103259
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Logoff records user logoffs. If this is an interactive logoff, it is recorded on the local system. If it is to a network share, it is recorded on the system accessed. Satisfies: SRG-OS-000472-GPOS-00217, SRG-OS-000480-GPOS-00227
Checks: C-6103r355876_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Logon/Logoff >> Logoff - Success

Fix: F-6103r355877_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Logon/Logoff >> "Audit Logoff" with "Success" selected.

b
Windows Server 2019 must be configured to audit Detailed Tracking - Plug and Play Events successes.
AU-12 - Medium - CCI-000172 - V-205839 - SV-205839r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000130
Vuln IDs
  • V-205839
  • V-93157
Rule IDs
  • SV-205839r569188_rule
  • SV-103245
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Plug and Play activity records events related to the successful connection of external devices.
Checks: C-6104r355879_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Detailed Tracking >> Plug and Play Events - Success

Fix: F-6104r355880_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Detailed Tracking >> "Audit PNP Activity" with "Success" selected.

b
Windows Server 2019 must be configured to audit Object Access - Removable Storage successes.
AU-12 - Medium - CCI-000172 - V-205840 - SV-205840r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000240
Vuln IDs
  • V-205840
  • V-93167
Rule IDs
  • SV-205840r569188_rule
  • SV-103255
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Removable Storage auditing under Object Access records events related to access attempts on file system objects on removable storage devices.
Checks: C-6105r355882_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Object Access >> Removable Storage - Success Virtual machines or systems that use network attached storage may generate excessive audit events for secondary virtual drives or the network attached storage when this setting is enabled. This may be set to Not Configured in such cases and would not be a finding.

Fix: F-6105r355883_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Object Access >> "Audit Removable Storage" with "Success" selected.

b
Windows Server 2019 must be configured to audit Object Access - Removable Storage failures.
AU-12 - Medium - CCI-000172 - V-205841 - SV-205841r569188_rule
RMF Control
AU-12
Severity
Medium
CCI
CCI-000172
Version
WN19-AU-000250
Vuln IDs
  • V-205841
  • V-93169
Rule IDs
  • SV-205841r569188_rule
  • SV-103257
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Removable Storage auditing under Object Access records events related to access attempts on file system objects on removable storage devices.
Checks: C-6106r355885_chk

Security Option "Audit: Force audit policy subcategory settings (Windows Vista or later) to override audit policy category settings" must be set to "Enabled" (WN19-SO-000050) for the detailed auditing subcategories to be effective. Use the "AuditPol" tool to review the current Audit Policy configuration: Open "PowerShell" or a "Command Prompt" with elevated privileges ("Run as administrator"). Enter "AuditPol /get /category:*" Compare the "AuditPol" settings with the following: If the system does not audit the following, this is a finding. Object Access >> Removable Storage - Failure Virtual machines or systems that use network attached storage may generate excessive audit events for secondary virtual drives or the network attached storage when this setting is enabled. This may be set to Not Configured in such cases and would not be a finding.

Fix: F-6106r355886_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Advanced Audit Policy Configuration >> System Audit Policies >> Object Access >> "Audit Removable Storage" with "Failure" selected.

b
Windows Server 2019 must be configured to use FIPS-compliant algorithms for encryption, hashing, and signing.
SC-13 - Medium - CCI-002450 - V-205842 - SV-205842r877466_rule
RMF Control
SC-13
Severity
Medium
CCI
CCI-002450
Version
WN19-SO-000360
Vuln IDs
  • V-205842
  • V-93511
Rule IDs
  • SV-205842r877466_rule
  • SV-103597
This setting ensures the system uses algorithms that are FIPS-compliant for encryption, hashing, and signing. FIPS-compliant algorithms meet specific standards established by the U.S. Government and must be the algorithms used for all OS encryption functions.
Checks: C-6107r355888_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\FIPSAlgorithmPolicy\ Value Name: Enabled Value Type: REG_DWORD Value: 0x00000001 (1) Clients with this setting enabled will not be able to communicate via digitally encrypted or signed protocols with servers that do not support these algorithms. Both the browser and web server must be configured to use TLS; otherwise. the browser will not be able to connect to a secure site.

Fix: F-6107r355889_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "System cryptography: Use FIPS compliant algorithms for encryption, hashing, and signing" to "Enabled".

b
Windows Server 2019 must, at a minimum, offload audit records of interconnected systems in real time and offload standalone or nondomain-joined systems weekly.
AU-4 - Medium - CCI-001851 - V-205843 - SV-205843r916198_rule
RMF Control
AU-4
Severity
Medium
CCI
CCI-001851
Version
WN19-AU-000020
Vuln IDs
  • V-205843
  • V-93185
Rule IDs
  • SV-205843r916198_rule
  • SV-103273
Protection of log data includes ensuring the log data is not accidentally lost or deleted. Audit information stored in one location is vulnerable to accidental or incidental deletion or alteration.
Checks: C-6108r857307_chk

Verify the audit records, at a minimum, are offloaded for interconnected systems in real time and offloaded for standalone or nondomain-joined systems weekly. If they are not, this is a finding.

Fix: F-6108r916198_fix

Configure the system to, at a minimum, offload audit records of interconnected systems in real time and offload standalone or nondomain-joined systems weekly.

c
Windows Server 2019 users with Administrative privileges must have separate accounts for administrative duties and normal operational tasks.
CM-6 - High - CCI-000366 - V-205844 - SV-205844r569188_rule
RMF Control
CM-6
Severity
High
CCI
CCI-000366
Version
WN19-00-000010
Vuln IDs
  • V-205844
  • V-93369
Rule IDs
  • SV-205844r569188_rule
  • SV-103457
Using a privileged account to perform routine functions makes the computer vulnerable to malicious software inadvertently introduced during a session that has been granted full privileges.
Checks: C-6109r355894_chk

Verify each user with administrative privileges has been assigned a unique administrative account separate from their standard user account. If users with administrative privileges do not have separate accounts for administrative functions and standard user functions, this is a finding.

Fix: F-6109r355895_fix

Ensure each user with administrative privileges has a separate account for user duties and one for privileged duties.

c
Windows Server 2019 administrative accounts must not be used with applications that access the Internet, such as web browsers, or with potential Internet sources, such as email.
CM-6 - High - CCI-000366 - V-205845 - SV-205845r569188_rule
RMF Control
CM-6
Severity
High
CCI
CCI-000366
Version
WN19-00-000030
Vuln IDs
  • V-205845
  • V-93205
Rule IDs
  • SV-205845r569188_rule
  • SV-103293
Using applications that access the Internet or have potential Internet sources using administrative privileges exposes a system to compromise. If a flaw in an application is exploited while running as a privileged user, the entire system could be compromised. Web browsers and email are common attack vectors for introducing malicious code and must not be run with an administrative account. Since administrative accounts may generally change or work around technical restrictions for running a web browser or other applications, it is essential that policy require administrative accounts to not access the Internet or use applications such as email. The policy should define specific exceptions for local service administration. These exceptions may include HTTP(S)-based tools that are used for the administration of the local system, services, or attached devices. Whitelisting can be used to enforce the policy to ensure compliance.
Checks: C-6110r355897_chk

Determine whether organization policy, at a minimum, prohibits administrative accounts from using applications that access the Internet, such as web browsers, or with potential Internet sources, such as email, except as necessary for local service administration. If it does not, this is a finding. The organization may use technical means such as whitelisting to prevent the use of browsers and mail applications to enforce this requirement.

Fix: F-6110r355898_fix

Establish a policy, at minimum, to prohibit administrative accounts from using applications that access the Internet, such as web browsers, or with potential Internet sources, such as email. Ensure the policy is enforced. The organization may use technical means such as whitelisting to prevent the use of browsers and mail applications to enforce this requirement.

b
Windows Server 2019 members of the Backup Operators group must have separate accounts for backup duties and normal operational tasks.
CM-6 - Medium - CCI-000366 - V-205846 - SV-205846r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-00-000040
Vuln IDs
  • V-205846
  • V-93207
Rule IDs
  • SV-205846r569188_rule
  • SV-103295
Backup Operators are able to read and write to any file in the system, regardless of the rights assigned to it. Backup and restore rights permit users to circumvent the file access restrictions present on NTFS disk drives for backup and restore purposes. Members of the Backup Operators group must have separate logon accounts for performing backup duties.
Checks: C-6111r355900_chk

If no accounts are members of the Backup Operators group, this is NA. Verify users with accounts in the Backup Operators group have a separate user account for backup functions and for performing normal user tasks. If users with accounts in the Backup Operators group do not have separate accounts for backup functions and standard user functions, this is a finding.

Fix: F-6111r355901_fix

Ensure each member of the Backup Operators group has separate accounts for backup functions and standard user functions.

b
Windows Server 2019 manually managed application account passwords must be changed at least annually or when a system administrator with knowledge of the password leaves the organization.
CM-6 - Medium - CCI-000366 - V-205847 - SV-205847r857288_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-00-000060
Vuln IDs
  • V-205847
  • V-93209
Rule IDs
  • SV-205847r857288_rule
  • SV-103297
Setting application account passwords to expire may cause applications to stop functioning. However, not changing them on a regular basis exposes them to attack. If managed service accounts are used, this alleviates the need to manually change application account passwords.
Checks: C-6112r857287_chk

Determine if manually managed application/service accounts exist. If none exist, this is NA. If passwords for manually managed application/service accounts are not changed at least annually or when an administrator with knowledge of the password leaves the organization, this is a finding. Identify manually managed application/service accounts. To determine the date a password was last changed: Domain controllers: Open "PowerShell". Enter "Get-AdUser -Identity [application account name] -Properties PasswordLastSet | FT Name, PasswordLastSet", where [application account name] is the name of the manually managed application/service account. If the "PasswordLastSet" date is more than one year old, this is a finding. Member servers and standalone or nondomain-joined systems: Open "Command Prompt". Enter 'Net User [application account name] | Find /i "Password Last Set"', where [application account name] is the name of the manually managed application/service account. If the "Password Last Set" date is more than one year old, this is a finding.

Fix: F-6112r355904_fix

Change passwords for manually managed application/service accounts at least annually or when an administrator with knowledge of the password leaves the organization. It is recommended that system-managed service accounts be used whenever possible.

b
Windows Server 2019 domain-joined systems must have a Trusted Platform Module (TPM) enabled and ready for use.
CM-6 - Medium - CCI-000366 - V-205848 - SV-205848r902429_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-00-000090
Vuln IDs
  • V-205848
  • V-93213
Rule IDs
  • SV-205848r902429_rule
  • SV-103301
Credential Guard uses virtualization-based security to protect data that could be used in credential theft attacks if compromised. A number of system requirements must be met in order for Credential Guard to be configured and enabled properly. Without a TPM enabled and ready for use, Credential Guard keys are stored in a less secure method using software.
Checks: C-6113r902428_chk

For standalone or nondomain-joined systems, this is NA. Verify the system has a TPM and it is ready for use. Run "tpm.msc". Review the sections in the center pane. "Status" must indicate it has been configured with a message such as "The TPM is ready for use" or "The TPM is on and ownership has been taken". TPM Manufacturer Information - Specific Version = 2.0 or 1.2 If a TPM is not found or is not ready for use, this is a finding.

Fix: F-6113r355907_fix

Ensure domain-joined systems have a TPM that is configured for use. (Versions 2.0 or 1.2 support Credential Guard.) The TPM must be enabled in the firmware. Run "tpm.msc" for configuration options in Windows.

c
Windows Server 2019 must be maintained at a supported servicing level.
CM-6 - High - CCI-000366 - V-205849 - SV-205849r569188_rule
RMF Control
CM-6
Severity
High
CCI
CCI-000366
Version
WN19-00-000100
Vuln IDs
  • V-205849
  • V-93215
Rule IDs
  • SV-205849r569188_rule
  • SV-103303
Systems at unsupported servicing levels will not receive security updates for new vulnerabilities, which leave them subject to exploitation. Systems must be maintained at a servicing level supported by the vendor with new security updates.
Checks: C-6114r355909_chk

Open "Command Prompt". Enter "winver.exe". If the "About Windows" dialog box does not display "Microsoft Windows Server Version 1809 (Build 17763.xxx)" or greater, this is a finding. Preview versions must not be used in a production environment.

Fix: F-6114r355910_fix

Update the system to a Version 1809 (Build 17763.xxx) or greater.

c
Windows Server 2019 must use an anti-virus program.
CM-6 - High - CCI-000366 - V-205850 - SV-205850r569245_rule
RMF Control
CM-6
Severity
High
CCI
CCI-000366
Version
WN19-00-000110
Vuln IDs
  • V-205850
  • V-93217
Rule IDs
  • SV-205850r569245_rule
  • SV-103305
Malicious software can establish a base on individual desktops and servers. Employing an automated mechanism to detect this type of software will aid in elimination of the software from the operating system.
Checks: C-6115r603166_chk

Verify an anti-virus solution is installed on the system. The anti-virus solution may be bundled with an approved host-based security solution. If there is no anti-virus solution installed on the system, this is a finding. Verify if Windows Defender is in use or enabled: Open "PowerShell". Enter “get-service | where {$_.DisplayName -Like "*Defender*"} | Select Status,DisplayName” Verify if third-party anti-virus is in use or enabled: Open "PowerShell". Enter "get-service | where {$_.DisplayName -Like "*mcafee*"} | Select Status,DisplayName” Enter "get-service | where {$_.DisplayName -Like "*symantec*"} | Select Status,DisplayName”

Fix: F-6115r603168_fix

If no anti-virus software is in use, install Windows Defender or third-party anti-virus. Open "PowerShell". Enter "Install-WindowsFeature -Name Windows-Defender”. For third-party anti-virus, install per anti-virus instructions and disable Windows Defender. Open "PowerShell". Enter "Uninstall-WindowsFeature -Name Windows-Defender”.

b
Windows Server 2019 must have a host-based intrusion detection or prevention system.
CM-6 - Medium - CCI-000366 - V-205851 - SV-205851r793214_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-00-000120
Vuln IDs
  • V-205851
  • V-93219
Rule IDs
  • SV-205851r793214_rule
  • SV-103307
A properly configured Host-based Intrusion Detection System (HIDS) or Host-based Intrusion Prevention System (HIPS) provides another level of defense against unauthorized access to critical servers. With proper configuration and logging enabled, such a system can stop and/or alert for many attempts to gain unauthorized access to resources.
Checks: C-6116r793213_chk

Determine whether there is a HIDS or HIPS on each server. If the HIPS component of ESS is installed and active on the host and the alerts of blocked activity are being logged and monitored, this meets the requirement. A HIDS device is not required on a system that has the role as the Network Intrusion Device (NID). However, this exception needs to be documented with the ISSO. If a HIDS is not installed on the system, this is a finding.

Fix: F-6116r355916_fix

Install a HIDS or HIPS on each server.

b
Windows Server 2019 must have software certificate installation files removed.
CM-6 - Medium - CCI-000366 - V-205852 - SV-205852r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-00-000240
Vuln IDs
  • V-205852
  • V-93221
Rule IDs
  • SV-205852r569188_rule
  • SV-103309
Use of software certificates and their accompanying installation files for end users to access resources is less secure than the use of hardware-based certificates.
Checks: C-6117r355918_chk

Search all drives for *.p12 and *.pfx files. If any files with these extensions exist, this is a finding. This does not apply to server-based applications that have a requirement for .p12 certificate files or Adobe PreFlight certificate files. Some applications create files with extensions of .p12 that are not certificate installation files. Removal of non-certificate installation files from systems is not required. These must be documented with the ISSO.

Fix: F-6117r355919_fix

Remove any certificate installation files (*.p12 and *.pfx) found on a system. Note: This does not apply to server-based applications that have a requirement for .p12 certificate files or Adobe PreFlight certificate files.

b
Windows Server 2019 FTP servers must be configured to prevent anonymous logons.
CM-6 - Medium - CCI-000366 - V-205853 - SV-205853r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-00-000420
Vuln IDs
  • V-205853
  • V-93223
Rule IDs
  • SV-205853r569188_rule
  • SV-103311
The FTP service allows remote users to access shared files and directories. Allowing anonymous FTP connections makes user auditing difficult. Using accounts that have administrator privileges to log on to FTP risks that the userid and password will be captured on the network and give administrator access to an unauthorized user.
Checks: C-6118r355921_chk

If FTP is not installed on the system, this is NA. Open "Internet Information Services (IIS) Manager". Select the server. Double-click "FTP Authentication". If the "Anonymous Authentication" status is "Enabled", this is a finding.

Fix: F-6118r355922_fix

Configure the FTP service to prevent anonymous logons. Open "Internet Information Services (IIS) Manager". Select the server. Double-click "FTP Authentication". Select "Anonymous Authentication". Select "Disabled" under "Actions".

b
Windows Server 2019 FTP servers must be configured to prevent access to the system drive.
CM-6 - Medium - CCI-000366 - V-205854 - SV-205854r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-00-000430
Vuln IDs
  • V-205854
  • V-93225
Rule IDs
  • SV-205854r569188_rule
  • SV-103313
The FTP service allows remote users to access shared files and directories that could provide access to system resources and compromise the system, especially if the user can gain access to the root directory of the boot drive.
Checks: C-6119r355924_chk

If FTP is not installed on the system, this is NA. Open "Internet Information Services (IIS) Manager". Select "Sites" under the server name. For any sites with a Binding that lists FTP, right-click the site and select "Explore". If the site is not defined to a specific folder for shared FTP resources, this is a finding. If the site includes any system areas such as root of the drive, Program Files, or Windows directories, this is a finding.

Fix: F-6119r355925_fix

Configure the FTP sites to allow access only to specific FTP shared resources. Do not allow access to other areas of the system.

b
Windows Server 2019 must have orphaned security identifiers (SIDs) removed from user rights.
CM-6 - Medium - CCI-000366 - V-205855 - SV-205855r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-00-000450
Vuln IDs
  • V-205855
  • V-93227
Rule IDs
  • SV-205855r569188_rule
  • SV-103315
Accounts or groups given rights on a system may show up as unresolved SIDs for various reasons including deletion of the accounts or groups. If the account or group objects are reanimated, there is a potential they may still have rights no longer intended. Valid domain accounts or groups may also show up as unresolved SIDs if a connection to the domain cannot be established for some reason.
Checks: C-6120r355927_chk

Review the effective User Rights setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> User Rights Assignment. Review each User Right listed for any unresolved SIDs to determine whether they are valid, such as due to being temporarily disconnected from the domain. (Unresolved SIDs have the format that begins with "*S-1-".) If any unresolved SIDs exist and are not for currently valid accounts or groups, this is a finding. For server core installations, run the following command: Secedit /export /areas USER_RIGHTS /cfg c:\path\UserRights.txt The results in the file identify user right assignments by SID instead of group name. Review the SIDs for unidentified ones. A list of typical SIDs \ Groups is below, search Microsoft for articles on well-known SIDs for others. If any unresolved SIDs exist and are not for currently valid accounts or groups, this is a finding. SID - Group S-1-5-11 - Authenticated Users S-1-5-113 - Local account S-1-5-114 - Local account and member of Administrators group S-1-5-19 - Local Service S-1-5-20 - Network Service S-1-5-32-544 - Administrators S-1-5-32-546 - Guests S-1-5-6 - Service S-1-5-9 - Enterprise Domain Controllers S-1-5-domain-512 - Domain Admins S-1-5-root domain-519 - Enterprise Admins S-1-5-80-3139157870-2983391045-3678747466-658725712-1809340420 - NT Service\WdiServiceHost

Fix: F-6120r355928_fix

Remove any unresolved SIDs found in User Rights assignments and determined to not be for currently valid accounts or groups by removing the accounts or groups from the appropriate group policy.

a
Windows Server 2019 systems must have Unified Extensible Firmware Interface (UEFI) firmware and be configured to run in UEFI mode, not Legacy BIOS.
CM-6 - Low - CCI-000366 - V-205856 - SV-205856r569188_rule
RMF Control
CM-6
Severity
Low
CCI
CCI-000366
Version
WN19-00-000460
Vuln IDs
  • V-205856
  • V-93229
Rule IDs
  • SV-205856r569188_rule
  • SV-103317
UEFI provides additional security features in comparison to legacy BIOS firmware, including Secure Boot. UEFI is required to support additional security features in Windows, including Virtualization Based Security and Credential Guard. Systems with UEFI that are operating in "Legacy BIOS" mode will not support these security features.
Checks: C-6121r355930_chk

Some older systems may not have UEFI firmware. This is currently a CAT III; it will be raised in severity at a future date when broad support of Windows hardware and firmware requirements are expected to be met. Devices that have UEFI firmware must run in "UEFI" mode. Verify the system firmware is configured to run in "UEFI" mode, not "Legacy BIOS". Run "System Information". Under "System Summary", if "BIOS Mode" does not display "UEFI", this is a finding.

Fix: F-6121r355931_fix

Configure UEFI firmware to run in "UEFI" mode, not "Legacy BIOS" mode.

a
Windows Server 2019 must have Secure Boot enabled.
CM-6 - Low - CCI-000366 - V-205857 - SV-205857r569188_rule
RMF Control
CM-6
Severity
Low
CCI
CCI-000366
Version
WN19-00-000470
Vuln IDs
  • V-205857
  • V-93231
Rule IDs
  • SV-205857r569188_rule
  • SV-103319
Secure Boot is a standard that ensures systems boot only to a trusted operating system. Secure Boot is required to support additional security features in Windows, including Virtualization Based Security and Credential Guard. If Secure Boot is turned off, these security features will not function.
Checks: C-6122r355933_chk

Some older systems may not have UEFI firmware. This is currently a CAT III; it will be raised in severity at a future date when broad support of Windows hardware and firmware requirements are expected to be met. Devices that have UEFI firmware must have Secure Boot enabled. Run "System Information". Under "System Summary", if "Secure Boot State" does not display "On", this is a finding. On server core installations, run the following PowerShell command: Confirm-SecureBootUEFI If a value of "True" is not returned, this is a finding.

Fix: F-6122r355934_fix

Enable Secure Boot in the system firmware.

a
Windows Server 2019 Internet Protocol version 6 (IPv6) source routing must be configured to the highest protection level to prevent IP source routing.
CM-6 - Low - CCI-000366 - V-205858 - SV-205858r569188_rule
RMF Control
CM-6
Severity
Low
CCI
CCI-000366
Version
WN19-CC-000030
Vuln IDs
  • V-205858
  • V-93233
Rule IDs
  • SV-205858r569188_rule
  • SV-103321
Configuring the system to disable IPv6 source routing protects against spoofing.
Checks: C-6123r355936_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Tcpip6\Parameters\ Value Name: DisableIPSourceRouting Type: REG_DWORD Value: 0x00000002 (2)

Fix: F-6123r355937_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> MSS (Legacy) >> "MSS: (DisableIPSourceRouting IPv6) IP source routing protection level (protects against packet spoofing)" to "Enabled" with "Highest protection, source routing is completely disabled" selected. This policy setting requires the installation of the MSS-Legacy custom templates included with the STIG package. "MSS-Legacy.admx" and "MSS-Legacy.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.

a
Windows Server 2019 source routing must be configured to the highest protection level to prevent Internet Protocol (IP) source routing.
CM-6 - Low - CCI-000366 - V-205859 - SV-205859r569188_rule
RMF Control
CM-6
Severity
Low
CCI
CCI-000366
Version
WN19-CC-000040
Vuln IDs
  • V-205859
  • V-93235
Rule IDs
  • SV-205859r569188_rule
  • SV-103323
Configuring the system to disable IP source routing protects against spoofing.
Checks: C-6124r355939_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\ Value Name: DisableIPSourceRouting Value Type: REG_DWORD Value: 0x00000002 (2)

Fix: F-6124r355940_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> MSS (Legacy) >> "MSS: (DisableIPSourceRouting) IP source routing protection level (protects against packet spoofing)" to "Enabled" with "Highest protection, source routing is completely disabled" selected. This policy setting requires the installation of the MSS-Legacy custom templates included with the STIG package. "MSS-Legacy.admx" and "MSS-Legacy.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.

a
Windows Server 2019 must be configured to prevent Internet Control Message Protocol (ICMP) redirects from overriding Open Shortest Path First (OSPF)-generated routes.
CM-6 - Low - CCI-000366 - V-205860 - SV-205860r569188_rule
RMF Control
CM-6
Severity
Low
CCI
CCI-000366
Version
WN19-CC-000050
Vuln IDs
  • V-205860
  • V-93237
Rule IDs
  • SV-205860r569188_rule
  • SV-103325
Allowing ICMP redirect of routes can lead to traffic not being routed properly. When disabled, this forces ICMP to be routed via the shortest path first.
Checks: C-6125r355942_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\ Value Name: EnableICMPRedirect Value Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6125r355943_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> MSS (Legacy) >> "MSS: (EnableICMPRedirect) Allow ICMP redirects to override OSPF generated routes" to "Disabled". This policy setting requires the installation of the MSS-Legacy custom templates included with the STIG package. "MSS-Legacy.admx" and "MSS-Legacy.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.

b
Windows Server 2019 insecure logons to an SMB server must be disabled.
CM-6 - Medium - CCI-000366 - V-205861 - SV-205861r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000070
Vuln IDs
  • V-205861
  • V-93239
Rule IDs
  • SV-205861r569188_rule
  • SV-103327
Insecure guest logons allow unauthenticated access to shared folders. Shared resources on a system must require authentication to establish proper access.
Checks: C-6126r355945_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\LanmanWorkstation\ Value Name: AllowInsecureGuestAuth Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6126r355946_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Network >> Lanman Workstation >> "Enable insecure guest logons" to "Disabled".

b
Windows Server 2019 hardened Universal Naming Convention (UNC) paths must be defined to require mutual authentication and integrity for at least the \\*\SYSVOL and \\*\NETLOGON shares.
CM-6 - Medium - CCI-000366 - V-205862 - SV-205862r857311_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000080
Vuln IDs
  • V-205862
  • V-93241
Rule IDs
  • SV-205862r857311_rule
  • SV-103329
Additional security requirements are applied to UNC paths specified in hardened UNC paths before allowing access to them. This aids in preventing tampering with or spoofing of connections to these paths.
Checks: C-6127r857310_chk

This requirement is applicable to domain-joined systems. For standalone or nondomain-joined systems, this is NA. If the following registry values do not exist or are not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\NetworkProvider\HardenedPaths\ Value Name: \\*\NETLOGON Value Type: REG_SZ Value: RequireMutualAuthentication=1, RequireIntegrity=1 Value Name: \\*\SYSVOL Value Type: REG_SZ Value: RequireMutualAuthentication=1, RequireIntegrity=1 Additional entries would not be a finding.

Fix: F-6127r355949_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Network >> Network Provider >> "Hardened UNC Paths" to "Enabled" with at least the following configured in "Hardened UNC Paths" (click the "Show" button to display): Value Name: \\*\SYSVOL Value: RequireMutualAuthentication=1, RequireIntegrity=1 Value Name: \\*\NETLOGON Value: RequireMutualAuthentication=1, RequireIntegrity=1

b
Windows Server 2019 must be configured to enable Remote host allows delegation of non-exportable credentials.
CM-6 - Medium - CCI-000366 - V-205863 - SV-205863r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000100
Vuln IDs
  • V-205863
  • V-93243
Rule IDs
  • SV-205863r569188_rule
  • SV-103331
An exportable version of credentials is provided to remote hosts when using credential delegation which exposes them to theft on the remote host. Restricted Admin mode or Remote Credential Guard allow delegation of non-exportable credentials providing additional protection of the credentials. Enabling this configures the host to support Restricted Admin mode or Remote Credential Guard.
Checks: C-6128r355951_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\CredentialsDelegation\ Value Name: AllowProtectedCreds Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6128r355952_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Credentials Delegation >> "Remote host allows delegation of non-exportable credentials" to "Enabled".

b
Windows Server 2019 virtualization-based security must be enabled with the platform security level configured to Secure Boot or Secure Boot with DMA Protection.
CM-6 - Medium - CCI-000366 - V-205864 - SV-205864r902431_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000110
Vuln IDs
  • V-205864
  • V-93245
Rule IDs
  • SV-205864r902431_rule
  • SV-103333
Virtualization-based security (VBS) provides the platform for the additional security features Credential Guard and virtualization-based protection of code integrity. Secure Boot is the minimum security level, with DMA protection providing additional memory protection. DMA Protection requires a CPU that supports input/output memory management unit (IOMMU).
Checks: C-6129r902430_chk

For standalone or nondomain-joined systems, this is NA. Open "PowerShell" with elevated privileges (run as administrator). Enter the following: "Get-CimInstance -ClassName Win32_DeviceGuard -Namespace root\Microsoft\Windows\DeviceGuard" If "RequiredSecurityProperties" does not include a value of "2" indicating "Secure Boot" (e.g., "{1, 2}"), this is a finding. If "Secure Boot and DMA Protection" is configured, "3" will also be displayed in the results (e.g., "{1, 2, 3}"). If "VirtualizationBasedSecurityStatus" is not a value of "2" indicating "Running", this is a finding. Alternately: Run "System Information". Under "System Summary", verify the following: If "Virtualization based security" does not display "Running", this is a finding. If "Virtualization based Required security Properties" does not display "Base Virtualization Support, Secure Boot", this is a finding. If "Secure Boot and DMA Protection" is configured, "DMA Protection" will also be displayed (e.g., "Base Virtualization Support, Secure Boot, DMA Protection"). The policy settings referenced in the Fix section will configure the following registry values. However, due to hardware requirements, the registry values alone do not ensure proper function. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\DeviceGuard\ Value Name: EnableVirtualizationBasedSecurity Value Type: REG_DWORD Value: 0x00000001 (1) Value Name: RequirePlatformSecurityFeatures Value Type: REG_DWORD Value: 0x00000001 (1) (Secure Boot only) or 0x00000003 (3) (Secure Boot and DMA Protection) A Microsoft TechNet article on Credential Guard, including system requirement details, can be found at the following link: https://technet.microsoft.com/itpro/windows/keep-secure/credential-guard

Fix: F-6129r355955_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Device Guard >> "Turn On Virtualization Based Security" to "Enabled" with "Secure Boot" or "Secure Boot and DMA Protection" selected. A Microsoft TechNet article on Credential Guard, including system requirement details, can be found at the following link: https://technet.microsoft.com/itpro/windows/keep-secure/credential-guard

b
Windows Server 2019 Early Launch Antimalware, Boot-Start Driver Initialization Policy must prevent boot drivers identified as bad.
CM-6 - Medium - CCI-000366 - V-205865 - SV-205865r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000130
Vuln IDs
  • V-205865
  • V-93249
Rule IDs
  • SV-205865r569188_rule
  • SV-103337
Compromised boot drivers can introduce malware prior to protection mechanisms that load after initialization. The Early Launch Antimalware driver can limit allowed drivers based on classifications determined by the malware protection application. At a minimum, drivers determined to be bad must not be allowed.
Checks: C-6130r355957_chk

The default behavior is for Early Launch Antimalware - Boot-Start Driver Initialization policy to enforce "Good, unknown and bad but critical" (preventing "bad"). If the registry value name below does not exist, this is not a finding. If it exists and is configured with a value of "0x00000007 (7)", this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Policies\EarlyLaunch\ Value Name: DriverLoadPolicy Value Type: REG_DWORD Value: 0x00000001 (1), 0x00000003 (3), or 0x00000008 (8) (or if the Value Name does not exist) Possible values for this setting are: 8 - Good only 1 - Good and unknown 3 - Good, unknown and bad but critical 7 - All (which includes "bad" and would be a finding)

Fix: F-6130r355958_fix

The default behavior is for Early Launch Antimalware - Boot-Start Driver Initialization policy to enforce "Good, unknown and bad but critical" (preventing "bad"). If this needs to be corrected or a more secure setting is desired, configure the policy value for Computer Configuration >> Administrative Templates >> System >> Early Launch Antimalware >> "Boot-Start Driver Initialization Policy" to "Not Configured" or "Enabled" with any option other than "All" selected.

b
Windows Server 2019 group policy objects must be reprocessed even if they have not changed.
CM-6 - Medium - CCI-000366 - V-205866 - SV-205866r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000140
Vuln IDs
  • V-205866
  • V-93251
Rule IDs
  • SV-205866r569188_rule
  • SV-103339
Registry entries for group policy settings can potentially be changed from the required configuration. This could occur as part of troubleshooting or by a malicious process on a compromised system. Enabling this setting and then selecting the "Process even if the Group Policy objects have not changed" option ensures the policies will be reprocessed even if none have been changed. This way, any unauthorized changes are forced to match the domain-based group policy settings again.
Checks: C-6131r355960_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Group Policy\{35378EAC-683F-11D2-A89A-00C04FBBCFA2}\ Value Name: NoGPOListChanges Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6131r355961_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Group Policy >> "Configure registry policy processing" to "Enabled" with the option "Process even if the Group Policy objects have not changed" selected.

b
Windows Server 2019 users must be prompted to authenticate when the system wakes from sleep (on battery).
CM-6 - Medium - CCI-000366 - V-205867 - SV-205867r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000180
Vuln IDs
  • V-205867
  • V-93253
Rule IDs
  • SV-205867r569188_rule
  • SV-103341
A system that does not require authentication when resuming from sleep may provide access to unauthorized users. Authentication must always be required when accessing a system. This setting ensures users are prompted for a password when the system wakes from sleep (on battery).
Checks: C-6132r355963_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Power\PowerSettings\0e796bdb-100d-47d6-a2d5-f7d2daa51f51\ Value Name: DCSettingIndex Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6132r355964_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Power Management >> Sleep Settings >> "Require a password when a computer wakes (on battery)" to "Enabled".

b
Windows Server 2019 users must be prompted to authenticate when the system wakes from sleep (plugged in).
CM-6 - Medium - CCI-000366 - V-205868 - SV-205868r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000190
Vuln IDs
  • V-205868
  • V-93255
Rule IDs
  • SV-205868r569188_rule
  • SV-103343
A system that does not require authentication when resuming from sleep may provide access to unauthorized users. Authentication must always be required when accessing a system. This setting ensures users are prompted for a password when the system wakes from sleep (plugged in).
Checks: C-6133r355966_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Power\PowerSettings\0e796bdb-100d-47d6-a2d5-f7d2daa51f51\ Value Name: ACSettingIndex Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6133r355967_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Power Management >> Sleep Settings >> "Require a password when a computer wakes (plugged in)" to "Enabled".

b
Windows Server 2019 Telemetry must be configured to Security or Basic.
CM-6 - Medium - CCI-000366 - V-205869 - SV-205869r921945_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000250
Vuln IDs
  • V-205869
  • V-93257
Rule IDs
  • SV-205869r921945_rule
  • SV-103345
Some features may communicate with the vendor, sending system information or downloading data or components for the feature. Limiting this capability will prevent potentially sensitive information from being sent outside the enterprise. The "Security" option for Telemetry configures the lowest amount of data, effectively none outside of the Malicious Software Removal Tool (MSRT), Defender, and telemetry client settings. "Basic" sends basic diagnostic and usage data and may be required to support some Microsoft services.
Checks: C-6134r355969_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\DataCollection\ Value Name: AllowTelemetry Type: REG_DWORD Value: 0x00000000 (0) (Security), 0x00000001 (1) (Basic)

Fix: F-6134r921944_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Data Collection >> "Allow Telemetry" to "Enabled" with "0 - Security [Enterprise Only]" or "1 - Basic" selected in "Options".

a
Windows Server 2019 Windows Update must not obtain updates from other PCs on the Internet.
CM-6 - Low - CCI-000366 - V-205870 - SV-205870r569188_rule
RMF Control
CM-6
Severity
Low
CCI
CCI-000366
Version
WN19-CC-000260
Vuln IDs
  • V-205870
  • V-93259
Rule IDs
  • SV-205870r569188_rule
  • SV-103347
Windows Update can obtain updates from additional sources instead of Microsoft. In addition to Microsoft, updates can be obtained from and sent to PCs on the local network as well as on the Internet. This is part of the Windows Update trusted process, however to minimize outside exposure, obtaining updates from or sending to systems on the Internet must be prevented.
Checks: C-6135r355972_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\DeliveryOptimization\ Value Name: DODownloadMode Value Type: REG_DWORD Value: 0x00000000 (0) - No peering (HTTP Only) 0x00000001 (1) - Peers on same NAT only (LAN) 0x00000002 (2) - Local Network / Private group peering (Group) 0x00000063 (99) - Simple download mode, no peering (Simple) 0x00000064 (100) - Bypass mode, Delivery Optimization not used (Bypass) A value of 0x00000003 (3), Internet, is a finding.

Fix: F-6135r355973_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Delivery Optimization >> "Download Mode" to "Enabled" with any option except "Internet" selected. Acceptable selections include: Bypass (100) Group (2) HTTP only (0) LAN (1) Simple (99)

a
Windows Server 2019 Turning off File Explorer heap termination on corruption must be disabled.
CM-6 - Low - CCI-000366 - V-205871 - SV-205871r569188_rule
RMF Control
CM-6
Severity
Low
CCI
CCI-000366
Version
WN19-CC-000320
Vuln IDs
  • V-205871
  • V-93261
Rule IDs
  • SV-205871r569188_rule
  • SV-103349
Legacy plug-in applications may continue to function when a File Explorer session has become corrupt. Disabling this feature will prevent this.
Checks: C-6136r355975_chk

The default behavior is for File Explorer heap termination on corruption to be enabled. If the registry Value Name below does not exist, this is not a finding. If it exists and is configured with a value of "0", this is not a finding. If it exists and is configured with a value of "1", this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Explorer\ Value Name: NoHeapTerminationOnCorruption Value Type: REG_DWORD Value: 0x00000000 (0) (or if the Value Name does not exist)

Fix: F-6136r355976_fix

The default behavior is for File Explorer heap termination on corruption to be disabled. If this needs to be corrected, configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> File Explorer >> "Turn off heap termination on corruption" to "Not Configured" or "Disabled".

b
Windows Server 2019 File Explorer shell protocol must run in protected mode.
CM-6 - Medium - CCI-000366 - V-205872 - SV-205872r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000330
Vuln IDs
  • V-205872
  • V-93263
Rule IDs
  • SV-205872r569188_rule
  • SV-103351
The shell protocol will limit the set of folders that applications can open when run in protected mode. Restricting files an application can open to a limited set of folders increases the security of Windows.
Checks: C-6137r355978_chk

The default behavior is for shell protected mode to be turned on for File Explorer. If the registry value name below does not exist, this is not a finding. If it exists and is configured with a value of "0", this is not a finding. If it exists and is configured with a value of "1", this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer\ Value Name: PreXPSP2ShellProtocolBehavior Value Type: REG_DWORD Value: 0x00000000 (0) (or if the Value Name does not exist)

Fix: F-6137r355979_fix

The default behavior is for shell protected mode to be turned on for File Explorer. If this needs to be corrected, configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> File Explorer >> "Turn off shell protocol protected mode" to "Not Configured" or "Disabled".

b
Windows Server 2019 must prevent attachments from being downloaded from RSS feeds.
CM-6 - Medium - CCI-000366 - V-205873 - SV-205873r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000390
Vuln IDs
  • V-205873
  • V-93265
Rule IDs
  • SV-205873r569188_rule
  • SV-103353
Attachments from RSS feeds may not be secure. This setting will prevent attachments from being downloaded from RSS feeds.
Checks: C-6138r355981_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Internet Explorer\Feeds\ Value Name: DisableEnclosureDownload Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6138r355982_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> RSS Feeds >> "Prevent downloading of enclosures" to "Enabled".

b
Windows Server 2019 users must be notified if a web-based program attempts to install software.
CM-6 - Medium - CCI-000366 - V-205874 - SV-205874r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000440
Vuln IDs
  • V-205874
  • V-93267
Rule IDs
  • SV-205874r569188_rule
  • SV-103355
Web-based programs may attempt to install malicious software on a system. Ensuring users are notified if a web-based program attempts to install software allows them to refuse the installation.
Checks: C-6139r355984_chk

The default behavior is for Internet Explorer to warn users and select whether to allow or refuse installation when a web-based program attempts to install software on the system. If the registry value name below does not exist, this is not a finding. If it exists and is configured with a value of "0", this is not a finding. If it exists and is configured with a value of "1", this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\Installer\ Value Name: SafeForScripting Value Type: REG_DWORD Value: 0x00000000 (0) (or if the Value Name does not exist)

Fix: F-6139r355985_fix

The default behavior is for Internet Explorer to warn users and select whether to allow or refuse installation when a web-based program attempts to install software on the system. If this needs to be corrected, configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Installer >> "Prevent Internet Explorer security prompt for Windows Installer scripts" to "Not Configured" or "Disabled".

c
Windows Server 2019 directory data (outside the root DSE) of a non-public directory must be configured to prevent anonymous access.
CM-6 - High - CCI-000366 - V-205875 - SV-205875r569188_rule
RMF Control
CM-6
Severity
High
CCI
CCI-000366
Version
WN19-DC-000150
Vuln IDs
  • V-205875
  • V-93271
Rule IDs
  • SV-205875r569188_rule
  • SV-103359
To the extent that anonymous access to directory data (outside the root DSE) is permitted, read access control of the data is effectively disabled. If other means of controlling access (such as network restrictions) are compromised, there may be nothing else to protect the confidentiality of sensitive directory data.
Checks: C-6140r355987_chk

This applies to domain controllers. It is NA for other systems. Open "Command Prompt" (not elevated). Run "ldp.exe". From the "Connection menu", select "Bind". Clear the User, Password, and Domain fields. Select "Simple bind" for the Bind type and click "OK". Confirmation of anonymous access will be displayed at the end: res = ldap_simple_bind_s Authenticated as: 'NT AUTHORITY\ANONYMOUS LOGON' From the "Browse" menu, select "Search". In the Search dialog, enter the DN of the domain naming context (generally something like "dc=disaost,dc=mil") in the Base DN field. Clear the Attributes field and select "Run". Error messages should display related to Bind and user not authenticated. If attribute data is displayed, anonymous access is enabled to the domain naming context and this is a finding. The following network controls allow the finding severity to be downgraded to a CAT II since these measures lower the risk associated with anonymous access. Network hardware ports at the site are subject to 802.1x authentication or MAC address restrictions. Premise firewall or host restrictions prevent access to ports 389, 636, 3268, and 3269 from client hosts not explicitly identified by domain (.mil) or IP address.

Fix: F-6140r355988_fix

Configure directory data (outside the root DSE) of a non-public directory to prevent anonymous access. For AD, there are multiple configuration items that could enable anonymous access. Changing the access permissions on the domain naming context object (from the secure defaults) could enable anonymous access. If the check procedures indicate this is the cause, the process that was used to change the permissions should be reversed. This could have been through the Windows Support Tools ADSI Edit console (adsiedit.msc). The dsHeuristics option is used. This is addressed in check V-8555 in the AD Forest STIG.

b
Windows Server 2019 domain controllers must be configured to allow reset of machine account passwords.
CM-6 - Medium - CCI-000366 - V-205876 - SV-205876r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-DC-000330
Vuln IDs
  • V-205876
  • V-93273
Rule IDs
  • SV-205876r569188_rule
  • SV-103361
Enabling this setting on all domain controllers in a domain prevents domain members from changing their computer account passwords. If these passwords are weak or compromised, the inability to change them may leave these computers vulnerable.
Checks: C-6141r355990_chk

This applies to domain controllers. It is NA for other systems. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Netlogon\Parameters\ Value Name: RefusePasswordChange Value Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6141r355991_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Domain controller: Refuse machine account password changes" to "Disabled".

b
The password for the krbtgt account on a domain must be reset at least every 180 days.
CM-6 - Medium - CCI-000366 - V-205877 - SV-205877r857315_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-DC-000430
Vuln IDs
  • V-205877
  • V-93211
Rule IDs
  • SV-205877r857315_rule
  • SV-103299
The krbtgt account acts as a service account for the Kerberos Key Distribution Center (KDC) service. The account and password are created when a domain is created and the password is typically not changed. If the krbtgt account is compromised, attackers can create valid Kerberos Ticket Granting Tickets (TGT). The password must be changed twice to effectively remove the password history. Changing once, waiting for replication to complete and the amount of time equal to or greater than the maximum Kerberos ticket lifetime, and changing again reduces the risk of issues.
Checks: C-6142r355993_chk

This requirement is applicable to domain controllers; it is NA for other systems. Open "Windows PowerShell". Enter "Get-ADUser krbtgt -Property PasswordLastSet". If the "PasswordLastSet" date is more than 180 days old, this is a finding.

Fix: F-6142r857314_fix

Reset the password for the krbtgt account a least every 180 days. The password must be changed twice to effectively remove the password history. Changing once, waiting for replication to complete and changing again reduces the risk of issues. Changing twice in rapid succession forces clients to reauthenticate (including application services) but is desired if a compromise is suspected. PowerShell scripts are available to accomplish this such as at the following link: https://docs.microsoft.com/en-us/answers/questions/97108/resetting-the-krbtgt-account-password-in-a-domain.html All scripts should be tested. Open "Active Directory Users and Computers" (available from various menus or run "dsa.msc"). Select "Advanced Features" in the "View" menu if not previously selected. Select the "Users" node. Right-click on the krbtgt account and select "Reset password". Enter a password that meets password complexity requirements. Clear the "User must change password at next logon" check box. The system will automatically change this to a system-generated complex password.

b
Windows Server 2019 must limit the caching of logon credentials to four or less on domain-joined member servers.
CM-6 - Medium - CCI-000366 - V-205906 - SV-205906r857326_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-MS-000050
Vuln IDs
  • V-205906
  • V-93275
Rule IDs
  • SV-205906r857326_rule
  • SV-103363
The default Windows configuration caches the last logon credentials for users who log on interactively to a system. This feature is provided for system availability reasons, such as the user's machine being disconnected from the network or domain controllers being unavailable. Even though the credential cache is well protected, if a system is attacked, an unauthorized individual may isolate the password to a domain user account using a password-cracking program and gain access to the domain.
Checks: C-6171r857325_chk

This applies to member servers. For domain controllers and standalone or nondomain-joined systems, this is NA. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\ Value Name: CachedLogonsCount Value Type: REG_SZ Value: 4 (or less)

Fix: F-6171r356081_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Interactive Logon: Number of previous logons to cache (in case Domain Controller is not available)" to "4" logons or less.

c
Windows Server 2019 must be running Credential Guard on domain-joined member servers.
CM-6 - High - CCI-000366 - V-205907 - SV-205907r857344_rule
RMF Control
CM-6
Severity
High
CCI
CCI-000366
Version
WN19-MS-000140
Vuln IDs
  • V-205907
  • V-93277
Rule IDs
  • SV-205907r857344_rule
  • SV-103365
Credential Guard uses virtualization-based security to protect data that could be used in credential theft attacks if compromised. This authentication information, which was stored in the Local Security Authority (LSA) in previous versions of Windows, is isolated from the rest of operating system and can only be accessed by privileged system software.
Checks: C-6172r857342_chk

For domain controllers and standalone or nondomain-joined systems, this is NA. Open "PowerShell" with elevated privileges (run as administrator). Enter the following: "Get-CimInstance -ClassName Win32_DeviceGuard -Namespace root\Microsoft\Windows\DeviceGuard" If "SecurityServicesRunning" does not include a value of "1" (e.g., "{1, 2}"), this is a finding. Alternately: Run "System Information". Under "System Summary", verify the following: If "Device Guard Security Services Running" does not list "Credential Guard", this is a finding. The policy settings referenced in the Fix section will configure the following registry value. However, due to hardware requirements, the registry value alone does not ensure proper function. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\DeviceGuard\ Value Name: LsaCfgFlags Value Type: REG_DWORD Value: 0x00000001 (1) (Enabled with UEFI lock) A Microsoft article on Credential Guard system requirement can be found at the following link: https://docs.microsoft.com/en-us/windows/security/identity-protection/credential-guard/credential-guard-requirements

Fix: F-6172r857343_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Device Guard >> "Turn On Virtualization Based Security" to "Enabled" with "Enabled with UEFI lock" selected for "Credential Guard Configuration". A Microsoft article on Credential Guard system requirement can be found at the following link: https://docs.microsoft.com/en-us/windows/security/identity-protection/credential-guard/credential-guard-requirements Severity Override Guidance: The AO can allow the severity override if they have reviewed the overall protection provided to the affected servers that are not capable of complying with the Credential Guard requirement. Items that should be reviewed/considered for compliance or mitigation for non-Credential Guard compliance are: The use of Microsoft Local Administrator Password Solution (LAPS) or similar products to control different local administrative passwords for all affected servers. This is to include a strict password change requirement (60 days or less). …. Strict separation of roles and duties. Server administrator credentials cannot be used on Windows 10 desktop to administer it. Documentation of all exceptions should be supplied. …. Use of a Privileged Access Workstation (PAW) and adherence to the Clean Source principle for administering affected servers. …. Boundary Protection that is currently in place to protect from vulnerabilities in the network/servers. …. Windows Defender rule block credential stealing from LSASS.exe is applied. This rule can only be applied if Windows Defender is in use. …. The overall number of vulnerabilities that are unmitigated on the network/servers.

c
Windows Server 2019 must prevent local accounts with blank passwords from being used from the network.
CM-6 - High - CCI-000366 - V-205908 - SV-205908r569188_rule
RMF Control
CM-6
Severity
High
CCI
CCI-000366
Version
WN19-SO-000020
Vuln IDs
  • V-205908
  • V-93279
Rule IDs
  • SV-205908r569188_rule
  • SV-103367
An account without a password can allow unauthorized access to a system as only the username would be required. Password policies should prevent accounts with blank passwords from existing on a system. However, if a local account with a blank password does exist, enabling this setting will prevent network access, limiting the account to local console logon only.
Checks: C-6173r356086_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\ Value Name: LimitBlankPasswordUse Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6173r356087_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Accounts: Limit local account use of blank passwords to console logon only" to "Enabled".

b
Windows Server 2019 built-in administrator account must be renamed.
CM-6 - Medium - CCI-000366 - V-205909 - SV-205909r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-SO-000030
Vuln IDs
  • V-205909
  • V-93281
Rule IDs
  • SV-205909r569188_rule
  • SV-103369
The built-in administrator account is a well-known account subject to attack. Renaming this account to an unidentified name improves the protection of this account and the system.
Checks: C-6174r356089_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options. If the value for "Accounts: Rename administrator account" is not set to a value other than "Administrator", this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "NewAdministratorName" is not something other than "Administrator" in the file, this is a finding.

Fix: F-6174r356090_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Accounts: Rename administrator account" to a name other than "Administrator".

b
Windows Server 2019 built-in guest account must be renamed.
CM-6 - Medium - CCI-000366 - V-205910 - SV-205910r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-SO-000040
Vuln IDs
  • V-205910
  • V-93283
Rule IDs
  • SV-205910r569188_rule
  • SV-103371
The built-in guest account is a well-known user account on all Windows systems and, as initially installed, does not require a password. This can allow access to system resources by unauthorized users. Renaming this account to an unidentified name improves the protection of this account and the system.
Checks: C-6175r356092_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options. If the value for "Accounts: Rename guest account" is not set to a value other than "Guest", this is a finding. For server core installations, run the following command: Secedit /Export /Areas SecurityPolicy /CFG C:\Path\FileName.Txt If "NewGuestName" is not something other than "Guest" in the file, this is a finding.

Fix: F-6175r356093_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Accounts: Rename guest account" to a name other than "Guest".

b
Windows Server 2019 maximum age for machine account passwords must be configured to 30 days or less.
CM-6 - Medium - CCI-000366 - V-205911 - SV-205911r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-SO-000100
Vuln IDs
  • V-205911
  • V-93285
Rule IDs
  • SV-205911r569188_rule
  • SV-103373
Computer account passwords are changed automatically on a regular basis. This setting controls the maximum password age that a machine account may have. This must be set to no more than 30 days, ensuring the machine changes its password monthly.
Checks: C-6176r356095_chk

This is the default configuration for this setting (30 days). If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\Netlogon\Parameters\ Value Name: MaximumPasswordAge Value Type: REG_DWORD Value: 0x0000001e (30) (or less, but not 0)

Fix: F-6176r356096_fix

This is the default configuration for this setting (30 days). Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Domain member: Maximum machine account password age" to "30" or less (excluding "0", which is unacceptable).

b
Windows Server 2019 Smart Card removal option must be configured to Force Logoff or Lock Workstation.
CM-6 - Medium - CCI-000366 - V-205912 - SV-205912r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-SO-000150
Vuln IDs
  • V-205912
  • V-93287
Rule IDs
  • SV-205912r569188_rule
  • SV-103375
Unattended systems are susceptible to unauthorized use and must be locked. Configuring a system to lock when a smart card is removed will ensure the system is inaccessible when unattended.
Checks: C-6177r356098_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\ Value Name: scremoveoption Value Type: REG_SZ Value: 1 (Lock Workstation) or 2 (Force Logoff) If configuring this on servers causes issues, such as terminating users' remote sessions, and the organization has a policy in place that any other sessions on the servers, such as administrative console logons, are manually locked or logged off when unattended or not in use, this would be acceptable. This must be documented with the ISSO.

Fix: F-6177r356099_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Interactive logon: Smart card removal behavior" to "Lock Workstation" or "Force Logoff".

c
Windows Server 2019 must not allow anonymous SID/Name translation.
CM-6 - High - CCI-000366 - V-205913 - SV-205913r569188_rule
RMF Control
CM-6
Severity
High
CCI
CCI-000366
Version
WN19-SO-000210
Vuln IDs
  • V-205913
  • V-93289
Rule IDs
  • SV-205913r569188_rule
  • SV-103377
Allowing anonymous SID/Name translation can provide sensitive information for accessing a system. Only authorized users must be able to perform such translations.
Checks: C-6178r356101_chk

Verify the effective setting in Local Group Policy Editor. Run "gpedit.msc". Navigate to Local Computer Policy >> Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options. If the value for "Network access: Allow anonymous SID/Name translation" is not set to "Disabled", this is a finding.

Fix: F-6178r356102_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Allow anonymous SID/Name translation" to "Disabled".

c
Windows Server 2019 must not allow anonymous enumeration of Security Account Manager (SAM) accounts.
CM-6 - High - CCI-000366 - V-205914 - SV-205914r569188_rule
RMF Control
CM-6
Severity
High
CCI
CCI-000366
Version
WN19-SO-000220
Vuln IDs
  • V-205914
  • V-93291
Rule IDs
  • SV-205914r569188_rule
  • SV-103379
Anonymous enumeration of SAM accounts allows anonymous logon users (null session connections) to list all accounts names, thus providing a list of potential points to attack the system.
Checks: C-6179r356104_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\ Value Name: RestrictAnonymousSAM Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6179r356105_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Do not allow anonymous enumeration of SAM accounts" to "Enabled".

b
Windows Server 2019 must be configured to prevent anonymous users from having the same permissions as the Everyone group.
CM-6 - Medium - CCI-000366 - V-205915 - SV-205915r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-SO-000240
Vuln IDs
  • V-205915
  • V-93293
Rule IDs
  • SV-205915r569188_rule
  • SV-103381
Access by anonymous users must be restricted. If this setting is enabled, anonymous users have the same rights and permissions as the built-in Everyone group. Anonymous users must not have these permissions or rights.
Checks: C-6180r356107_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\ Value Name: EveryoneIncludesAnonymous Value Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6180r356108_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Let Everyone permissions apply to anonymous users" to "Disabled".

b
Windows Server 2019 services using Local System that use Negotiate when reverting to NTLM authentication must use the computer identity instead of authenticating anonymously.
CM-6 - Medium - CCI-000366 - V-205916 - SV-205916r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-SO-000260
Vuln IDs
  • V-205916
  • V-93295
Rule IDs
  • SV-205916r569188_rule
  • SV-103383
Services using Local System that use Negotiate when reverting to NTLM authentication may gain unauthorized access if allowed to authenticate anonymously versus using the computer identity.
Checks: C-6181r356110_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\LSA\ Value Name: UseMachineId Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6181r356111_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: Allow Local System to use computer identity for NTLM" to "Enabled".

b
Windows Server 2019 must prevent NTLM from falling back to a Null session.
CM-6 - Medium - CCI-000366 - V-205917 - SV-205917r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-SO-000270
Vuln IDs
  • V-205917
  • V-93297
Rule IDs
  • SV-205917r569188_rule
  • SV-103385
NTLM sessions that are allowed to fall back to Null (unauthenticated) sessions may gain unauthorized access.
Checks: C-6182r356113_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\LSA\MSV1_0\ Value Name: allownullsessionfallback Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6182r356114_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: Allow LocalSystem NULL session fallback" to "Disabled".

b
Windows Server 2019 must prevent PKU2U authentication using online identities.
CM-6 - Medium - CCI-000366 - V-205918 - SV-205918r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-SO-000280
Vuln IDs
  • V-205918
  • V-93299
Rule IDs
  • SV-205918r569188_rule
  • SV-103387
PKU2U is a peer-to-peer authentication protocol. This setting prevents online identities from authenticating to domain-joined systems. Authentication will be centrally managed with Windows user accounts.
Checks: C-6183r356116_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\LSA\pku2u\ Value Name: AllowOnlineID Type: REG_DWORD Value: 0x00000000 (0)

Fix: F-6183r356117_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: Allow PKU2U authentication requests to this computer to use online identities" to "Disabled".

c
Windows Server 2019 LAN Manager authentication level must be configured to send NTLMv2 response only and to refuse LM and NTLM.
CM-6 - High - CCI-000366 - V-205919 - SV-205919r857347_rule
RMF Control
CM-6
Severity
High
CCI
CCI-000366
Version
WN19-SO-000310
Vuln IDs
  • V-205919
  • V-93301
Rule IDs
  • SV-205919r857347_rule
  • SV-103389
The Kerberos v5 authentication protocol is the default for authentication of users who are logging on to domain accounts. NTLM, which is less secure, is retained in later Windows versions for compatibility with clients and servers that are running earlier versions of Windows or applications that still use it. It is also used to authenticate logons to standalone or nondomain-joined computers that are running later versions.
Checks: C-6184r356119_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\ Value Name: LmCompatibilityLevel Value Type: REG_DWORD Value: 0x00000005 (5)

Fix: F-6184r356120_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: LAN Manager authentication level" to "Send NTLMv2 response only. Refuse LM & NTLM".

b
Windows Server 2019 must be configured to at least negotiate signing for LDAP client signing.
CM-6 - Medium - CCI-000366 - V-205920 - SV-205920r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-SO-000320
Vuln IDs
  • V-205920
  • V-93303
Rule IDs
  • SV-205920r569188_rule
  • SV-103391
This setting controls the signing requirements for LDAP clients. This must be set to "Negotiate signing" or "Require signing", depending on the environment and type of LDAP server in use.
Checks: C-6185r356122_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Services\LDAP\ Value Name: LDAPClientIntegrity Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6185r356123_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: LDAP client signing requirements" to "Negotiate signing" at a minimum.

b
Windows Server 2019 session security for NTLM SSP-based clients must be configured to require NTLMv2 session security and 128-bit encryption.
CM-6 - Medium - CCI-000366 - V-205921 - SV-205921r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-SO-000330
Vuln IDs
  • V-205921
  • V-93305
Rule IDs
  • SV-205921r569188_rule
  • SV-103393
Microsoft has implemented a variety of security support providers for use with Remote Procedure Call (RPC) sessions. All of the options must be enabled to ensure the maximum security level.
Checks: C-6186r356125_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0\ Value Name: NTLMMinClientSec Value Type: REG_DWORD Value: 0x20080000 (537395200)

Fix: F-6186r356126_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: Minimum session security for NTLM SSP based (including secure RPC) clients" to "Require NTLMv2 session security" and "Require 128-bit encryption" (all options selected).

b
Windows Server 2019 session security for NTLM SSP-based servers must be configured to require NTLMv2 session security and 128-bit encryption.
CM-6 - Medium - CCI-000366 - V-205922 - SV-205922r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-SO-000340
Vuln IDs
  • V-205922
  • V-93307
Rule IDs
  • SV-205922r569188_rule
  • SV-103395
Microsoft has implemented a variety of security support providers for use with Remote Procedure Call (RPC) sessions. All of the options must be enabled to ensure the maximum security level.
Checks: C-6187r356128_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\MSV1_0\ Value Name: NTLMMinServerSec Value Type: REG_DWORD Value: 0x20080000 (537395200)

Fix: F-6187r356129_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network security: Minimum session security for NTLM SSP based (including secure RPC) servers" to "Require NTLMv2 session security" and "Require 128-bit encryption" (all options selected).

a
Windows Server 2019 default permissions of global system objects must be strengthened.
CM-6 - Low - CCI-000366 - V-205923 - SV-205923r569188_rule
RMF Control
CM-6
Severity
Low
CCI
CCI-000366
Version
WN19-SO-000370
Vuln IDs
  • V-205923
  • V-93309
Rule IDs
  • SV-205923r569188_rule
  • SV-103397
Windows systems maintain a global list of shared system resources such as DOS device names, mutexes, and semaphores. Each type of object is created with a default Discretionary Access Control List (DACL) that specifies who can access the objects with what permissions. When this policy is enabled, the default DACL is stronger, allowing non-administrative users to read shared objects but not to modify shared objects they did not create.
Checks: C-6188r356131_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Session Manager\ Value Name: ProtectionMode Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6188r356132_fix

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "System objects: Strengthen default permissions of internal system objects (e.g., Symbolic Links)" to "Enabled".

b
Windows Server 2019 must preserve zone information when saving attachments.
CM-6 - Medium - CCI-000366 - V-205924 - SV-205924r569188_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-UC-000010
Vuln IDs
  • V-205924
  • V-93311
Rule IDs
  • SV-205924r569188_rule
  • SV-103399
Attachments from outside sources may contain malicious code. Preserving zone of origin (Internet, intranet, local, restricted) information on file attachments allows Windows to determine risk.
Checks: C-6189r356134_chk

The default behavior is for Windows to mark file attachments with their zone information. If the registry Value Name below does not exist, this is not a finding. If it exists and is configured with a value of "2", this is not a finding. If it exists and is configured with a value of "1", this is a finding. Registry Hive: HKEY_CURRENT_USER Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Attachments\ Value Name: SaveZoneInformation Value Type: REG_DWORD Value: 0x00000002 (2) (or if the Value Name does not exist)

Fix: F-6189r356135_fix

The default behavior is for Windows to mark file attachments with their zone information. If this needs to be corrected, configure the policy value for User Configuration >> Administrative Templates >> Windows Components >> Attachment Manager >> "Do not preserve zone information in file attachments" to "Not Configured" or "Disabled".

b
Windows Server 2019 must disable automatically signing in the last interactive user after a system-initiated restart.
CM-6 - Medium - CCI-000366 - V-205925 - SV-205925r877377_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000450
Vuln IDs
  • V-205925
  • V-93269
Rule IDs
  • SV-205925r877377_rule
  • SV-103357
Windows can be configured to automatically sign the user back in after a Windows Update restart. Some protections are in place to help ensure this is done in a secure fashion; however, disabling this will prevent the caching of credentials for this purpose and also ensure the user is aware of the restart.
Checks: C-6190r356137_chk

Verify the registry value below. If it does not exist or is not configured as specified, this is a finding. Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ Value Name: DisableAutomaticRestartSignOn Value Type: REG_DWORD Value: 0x00000001 (1)

Fix: F-6190r356138_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows Logon Options >> "Sign-in last interactive user automatically after a system-initiated restart" to "Disabled".

b
Windows Server 2019 must have a host-based firewall installed and enabled.
CM-6 - Medium - CCI-000366 - V-214936 - SV-214936r852535_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-00-000280
Vuln IDs
  • V-214936
  • V-93571
Rule IDs
  • SV-214936r852535_rule
  • SV-103657
A firewall provides a line of defense against attack, allowing or blocking inbound and outbound connections based on a set of rules.
Checks: C-16136r356140_chk

Determine if a host-based firewall is installed and enabled on the system. If a host-based firewall is not installed and enabled on the system, this is a finding. The configuration requirements will be determined by the applicable firewall STIG.

Fix: F-16134r356141_fix

Install and enable a host-based firewall on the system.

b
The Windows Explorer Preview pane must be disabled for Windows Server 2019.
CM-6 - Medium - CCI-000366 - V-236001 - SV-236001r641821_rule
RMF Control
CM-6
Severity
Medium
CCI
CCI-000366
Version
WN19-CC-000451
Vuln IDs
  • V-236001
  • V-102625
Rule IDs
  • SV-236001r641821_rule
  • SV-111575
A known vulnerability in Windows could allow the execution of malicious code by either opening a compromised document or viewing it in the Windows Preview pane. Organizations must disable the Windows Preview pane and Windows Detail pane.
Checks: C-39220r641819_chk

If the following registry values do not exist or are not configured as specified, this is a finding: Registry Hive: HKEY_CURRENT_USER Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer Value Name: NoPreviewPane Value Type: REG_DWORD Value: 1 Registry Hive: HKEY_CURRENT_USER Registry Path: \SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Explorer Value Name: NoReadingPane Value Type: REG_DWORD Value: 1

Fix: F-39183r641820_fix

Ensure the following settings are configured for Windows Server 2019 locally or applied through group policy. Configure the policy value for User Configuration >> Administrative Templates >> Windows Components >> File Explorer >> Explorer Frame Pane "Turn off Preview Pane" to "Enabled". Configure the policy value for User Configuration >> Administrative Templates >> Windows Components >> File Explorer >> Explorer Frame Pane "Turn on or off details pane" to "Enabled" and "Configure details pane" to "Always hide".

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Windows Server 2019 must have PowerShell Transcription enabled.
AU-3 - Medium - CCI-000134 - V-257503 - SV-257503r921895_rule
RMF Control
AU-3
Severity
Medium
CCI
CCI-000134
Version
WN19-CC-000530
Vuln IDs
  • V-257503
Rule IDs
  • SV-257503r921895_rule
Maintaining an audit trail of system activity logs can help identify configuration errors, troubleshoot service disruptions, and analyze compromises that have occurred, as well as detect attacks. Audit logs are necessary to provide a trail of evidence in case the system or network is compromised. Collecting this data is essential for analyzing the security of information assets and detecting signs of suspicious and unexpected behavior. Enabling PowerShell Transcription will record detailed information from the processing of PowerShell commands and scripts. This can provide additional detail when malware has run on a system.
Checks: C-61238r921893_chk

If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SOFTWARE\Policies\Microsoft\Windows\PowerShell\Transcription\ Value Name: EnableTranscripting Value Type: REG_DWORD Value: 1

Fix: F-61162r921894_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Windows PowerShell >> "Turn on PowerShell Transcription" to "Enabled". Specify the Transcript output directory to point to a Central Log Server or another secure location to prevent user access.