View SCAP - Microsoft Windows Server 2019 STIG SCAP Benchmark V2R5

b

Windows Server 2019 must be configured to audit Account Management - Security Group Management successes.

RMF Control: AC-2
Severity: Medium
CCI: CCI-000018
Version: WN19-AU-000100
Vuln IDs: V-205625
Rule IDs: SV-205625r852412_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. 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

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.

RMF Control: AC-2
Severity: Medium
CCI: CCI-000018
Version: WN19-AU-000110
Vuln IDs: V-205626
Rule IDs: SV-205626r852413_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. 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

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.

RMF Control: AC-2
Severity: Medium
CCI: CCI-000018
Version: WN19-AU-000120
Vuln IDs: V-205627
Rule IDs: SV-205627r852414_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. 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

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 have the number of allowed bad logon attempts configured to three or less.

RMF Control: AC-7
Severity: Medium
CCI: CCI-000044
Version: WN19-AC-000020
Vuln IDs: V-205629
Rule IDs: SV-205629r569188_rule

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.

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.

RMF Control: AC-7
Severity: Medium
CCI: CCI-000044
Version: WN19-AC-000030
Vuln IDs: V-205630
Rule IDs: SV-205630r852416_rule

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

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 machine inactivity limit must be set to 15 minutes or less, locking the system with the screen saver.

RMF Control: AC-11
Severity: Medium
CCI: CCI-000056
Version: WN19-SO-000120
Vuln IDs: V-205633
Rule IDs: SV-205633r569188_rule

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

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.

RMF Control: AC-17
Severity: Medium
CCI: CCI-000067
Version: WN19-AU-000190
Vuln IDs: V-205634
Rule IDs: SV-205634r569188_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. 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

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.

RMF Control: AC-17
Severity: Medium
CCI: CCI-000067
Version: WN19-AU-000200
Vuln IDs: V-205635
Rule IDs: SV-205635r569188_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. 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

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.

RMF Control: AC-17
Severity: Medium
CCI: CCI-000068
Version: WN19-CC-000370
Vuln IDs: V-205636
Rule IDs: SV-205636r877398_rule

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

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.

RMF Control: AC-17
Severity: Medium
CCI: CCI-000068
Version: WN19-CC-000380
Vuln IDs: V-205637
Rule IDs: SV-205637r877398_rule

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

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.

RMF Control: AU-3
Severity: Medium
CCI: CCI-000135
Version: WN19-CC-000090
Vuln IDs: V-205638
Rule IDs: SV-205638r569188_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 "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.

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.

RMF Control: AU-3
Severity: Medium
CCI: CCI-000135
Version: WN19-CC-000460
Vuln IDs: V-205639
Rule IDs: SV-205639r569188_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 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.

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.

RMF Control: AU-9
Severity: Medium
CCI: CCI-000162
Version: WN19-AU-000030
Vuln IDs: V-205640
Rule IDs: SV-205640r569188_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. 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

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.

RMF Control: AU-9
Severity: Medium
CCI: CCI-000162
Version: WN19-AU-000040
Vuln IDs: V-205641
Rule IDs: SV-205641r569188_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. 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

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.

RMF Control: AU-9
Severity: Medium
CCI: CCI-000162
Version: WN19-AU-000050
Vuln IDs: V-205642
Rule IDs: SV-205642r569188_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. 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

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.

RMF Control: AU-9
Severity: Medium
CCI: CCI-000162
Version: WN19-UR-000170
Vuln IDs: V-205643
Rule IDs: SV-205643r852417_rule

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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000169
Version: WN19-SO-000050
Vuln IDs: V-205644
Rule IDs: SV-205644r569188_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. This setting allows administrators to enable more precise auditing capabilities.

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 must have the DoD Root Certificate Authority (CA) certificates installed in the Trusted Root Store.

RMF Control: IA-5
Severity: Medium
CCI: CCI-000185
Version: WN19-PK-000010
Vuln IDs: V-205648
Rule IDs: SV-205648r921948_rule

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

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.

RMF Control: IA-5
Severity: Medium
CCI: CCI-000185
Version: WN19-PK-000020
Vuln IDs: V-205649
Rule IDs: SV-205649r894615_rule

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

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.

RMF Control: IA-5
Severity: Medium
CCI: CCI-000185
Version: WN19-PK-000030
Vuln IDs: V-205650
Rule IDs: SV-205650r890530_rule

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

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.

RMF Control: IA-5
Severity: Medium
CCI: CCI-000186
Version: WN19-SO-000350
Vuln IDs: V-205651
Rule IDs: SV-205651r569188_rule

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.

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.

RMF Control: IA-5
Severity: Medium
CCI: CCI-000192
Version: WN19-AC-000080
Vuln IDs: V-205652
Rule IDs: SV-205652r569188_rule

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

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.

RMF Control: IA-5
Severity: High
CCI: CCI-000196
Version: WN19-AC-000090
Vuln IDs: V-205653
Rule IDs: SV-205653r877397_rule

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.

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.

RMF Control: IA-5
Severity: High
CCI: CCI-000196
Version: WN19-SO-000300
Vuln IDs: V-205654
Rule IDs: SV-205654r877397_rule

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.

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.

RMF Control: IA-5
Severity: Medium
CCI: CCI-000197
Version: WN19-SO-000180
Vuln IDs: V-205655
Rule IDs: SV-205655r877396_rule

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.

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.

RMF Control: IA-5
Severity: Medium
CCI: CCI-000198
Version: WN19-AC-000060
Vuln IDs: V-205656
Rule IDs: SV-205656r569188_rule

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.

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 maximum password age must be configured to 60 days or less.

RMF Control: IA-5
Severity: Medium
CCI: CCI-000199
Version: WN19-AC-000050
Vuln IDs: V-205659
Rule IDs: SV-205659r569188_rule

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.

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.

RMF Control: IA-5
Severity: Medium
CCI: CCI-000200
Version: WN19-AC-000040
Vuln IDs: V-205660
Rule IDs: SV-205660r569188_rule

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.

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 minimum password length must be configured to 14 characters.

RMF Control: IA-5
Severity: Medium
CCI: CCI-000205
Version: WN19-AC-000070
Vuln IDs: V-205662
Rule IDs: SV-205662r569188_rule

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.

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.

RMF Control: AC-3
Severity: High
CCI: CCI-000213
Version: WN19-00-000130
Vuln IDs: V-205663
Rule IDs: SV-205663r569188_rule

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.

Fix: F-5928r354908_fix

Format volumes to use NTFS or ReFS.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-DC-000340
Vuln IDs: V-205665
Rule IDs: SV-205665r569188_rule

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.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-DC-000360
Vuln IDs: V-205666
Rule IDs: SV-205666r569188_rule

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.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-DC-000370
Vuln IDs: V-205667
Rule IDs: SV-205667r569188_rule

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.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-DC-000380
Vuln IDs: V-205668
Rule IDs: SV-205668r569188_rule

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.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-DC-000390
Vuln IDs: V-205669
Rule IDs: SV-205669r569188_rule

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.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-DC-000400
Vuln IDs: V-205670
Rule IDs: SV-205670r569188_rule

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.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-MS-000070
Vuln IDs: V-205671
Rule IDs: SV-205671r857331_rule

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.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-MS-000080
Vuln IDs: V-205672
Rule IDs: SV-205672r857333_rule

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.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-MS-000090
Vuln IDs: V-205673
Rule IDs: SV-205673r857335_rule

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.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-MS-000100
Vuln IDs: V-205674
Rule IDs: SV-205674r891848_rule

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.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-MS-000110
Vuln IDs: V-205675
Rule IDs: SV-205675r857337_rule

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.

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.

RMF Control: AC-3
Severity: Medium
CCI: CCI-000213
Version: WN19-UR-000030
Vuln IDs: V-205676
Rule IDs: SV-205676r569188_rule

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.

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 not have the Fax Server role installed.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-00-000320
Vuln IDs: V-205678
Rule IDs: SV-205678r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-00-000340
Vuln IDs: V-205679
Rule IDs: SV-205679r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-00-000350
Vuln IDs: V-205680
Rule IDs: SV-205680r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-00-000370
Vuln IDs: V-205681
Rule IDs: SV-205681r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-00-000380
Vuln IDs: V-205682
Rule IDs: SV-205682r819711_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-00-000390
Vuln IDs: V-205683
Rule IDs: SV-205683r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-00-000400
Vuln IDs: V-205684
Rule IDs: SV-205684r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-00-000410
Vuln IDs: V-205685
Rule IDs: SV-205685r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-CC-000010
Vuln IDs: V-205686
Rule IDs: SV-205686r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-CC-000020
Vuln IDs: V-205687
Rule IDs: SV-205687r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-CC-000150
Vuln IDs: V-205688
Rule IDs: SV-205688r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-CC-000160
Vuln IDs: V-205689
Rule IDs: SV-205689r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-CC-000170
Vuln IDs: V-205690
Rule IDs: SV-205690r569188_rule

Enabling interaction with the network selection UI allows users to change connections to available networks without signing in to Windows.

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.

RMF Control: CM-7
Severity: Low
CCI: CCI-000381
Version: WN19-CC-000200
Vuln IDs: V-205691
Rule IDs: SV-205691r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-CC-000300
Vuln IDs: V-205692
Rule IDs: SV-205692r569188_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-CC-000400
Vuln IDs: V-205693
Rule IDs: SV-205693r569188_rule

Basic authentication uses plain-text passwords that could be used to compromise a system. Disabling Basic authentication will reduce this potential.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-CC-000410
Vuln IDs: V-205694
Rule IDs: SV-205694r569188_rule

Indexing of encrypted files may expose sensitive data. This setting prevents encrypted files from being indexed.

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 local users on domain-joined member servers must not be enumerated.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000381
Version: WN19-MS-000030
Vuln IDs: V-205696
Rule IDs: SV-205696r857322_rule

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.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000382
Version: WN19-00-000330
Vuln IDs: V-205697
Rule IDs: SV-205697r569188_rule

Unnecessary services increase the attack surface of a system. Some of these services may not support required levels of authentication or encryption.

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.

RMF Control: CM-7
Severity: Medium
CCI: CCI-000382
Version: WN19-00-000360
Vuln IDs: V-205698
Rule IDs: SV-205698r569188_rule

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.

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 Kerberos user logon restrictions must be enforced.

RMF Control: IA-2
Severity: Medium
CCI: CCI-001941
Version: WN19-DC-000020
Vuln IDs: V-205702
Rule IDs: SV-205702r852424_rule

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

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.

RMF Control: IA-2
Severity: Medium
CCI: CCI-001941
Version: WN19-DC-000030
Vuln IDs: V-205703
Rule IDs: SV-205703r852425_rule

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

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.

RMF Control: IA-2
Severity: Medium
CCI: CCI-001941
Version: WN19-DC-000040
Vuln IDs: V-205704
Rule IDs: SV-205704r852426_rule

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

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.

RMF Control: IA-2
Severity: Medium
CCI: CCI-001941
Version: WN19-DC-000050
Vuln IDs: V-205705
Rule IDs: SV-205705r852427_rule

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

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.

RMF Control: IA-2
Severity: Medium
CCI: CCI-001941
Version: WN19-DC-000060
Vuln IDs: V-205706
Rule IDs: SV-205706r852428_rule

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

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 Kerberos encryption types must be configured to prevent the use of DES and RC4 encryption suites.

RMF Control: IA-7
Severity: Medium
CCI: CCI-000803
Version: WN19-SO-000290
Vuln IDs: V-205708
Rule IDs: SV-205708r569188_rule

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.

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.

RMF Control: IA-8
Severity: Medium
CCI: CCI-000804
Version: WN19-SO-000010
Vuln IDs: V-205709
Rule IDs: SV-205709r569188_rule

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.

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".

c

Windows Server 2019 Windows Remote Management (WinRM) client must not use Basic authentication.

RMF Control: MA-4
Severity: High
CCI: CCI-000877
Version: WN19-CC-000470
Vuln IDs: V-205711
Rule IDs: SV-205711r877395_rule

Basic authentication uses plain-text passwords that could be used to compromise a system. Disabling Basic authentication will reduce this potential.

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.

RMF Control: MA-4
Severity: Medium
CCI: CCI-000877
Version: WN19-CC-000490
Vuln IDs: V-205712
Rule IDs: SV-205712r877395_rule

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.

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.

RMF Control: MA-4
Severity: High
CCI: CCI-000877
Version: WN19-CC-000500
Vuln IDs: V-205713
Rule IDs: SV-205713r877395_rule

Basic authentication uses plain-text passwords that could be used to compromise a system. Disabling Basic authentication will reduce this potential.

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.

RMF Control: SC-3
Severity: Medium
CCI: CCI-001084
Version: WN19-CC-000240
Vuln IDs: V-205714
Rule IDs: SV-205714r569188_rule

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.

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.

RMF Control: SC-3
Severity: Medium
CCI: CCI-001084
Version: WN19-MS-000020
Vuln IDs: V-205715
Rule IDs: SV-205715r857320_rule

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.

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.

RMF Control: SC-3
Severity: Medium
CCI: CCI-001084
Version: WN19-SO-000390
Vuln IDs: V-205716
Rule IDs: SV-205716r569188_rule

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.

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.

RMF Control: SC-3
Severity: Medium
CCI: CCI-001084
Version: WN19-SO-000400
Vuln IDs: V-205717
Rule IDs: SV-205717r569188_rule

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.

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.

RMF Control: SC-3
Severity: Medium
CCI: CCI-001084
Version: WN19-SO-000420
Vuln IDs: V-205718
Rule IDs: SV-205718r569188_rule

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.

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.

RMF Control: SC-3
Severity: Medium
CCI: CCI-001084
Version: WN19-SO-000430
Vuln IDs: V-205719
Rule IDs: SV-205719r569188_rule

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.

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.

RMF Control: SC-3
Severity: Medium
CCI: CCI-001084
Version: WN19-SO-000450
Vuln IDs: V-205720
Rule IDs: SV-205720r569188_rule

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.

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 Remote Desktop Services must prevent drive redirection.

RMF Control: SC-4
Severity: Medium
CCI: CCI-001090
Version: WN19-CC-000350
Vuln IDs: V-205722
Rule IDs: SV-205722r569188_rule

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.

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".

c

Windows Server 2019 must not allow anonymous enumeration of shares.

RMF Control: SC-4
Severity: High
CCI: CCI-001090
Version: WN19-SO-000230
Vuln IDs: V-205724
Rule IDs: SV-205724r569188_rule

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.

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.

RMF Control: SC-4
Severity: High
CCI: CCI-001090
Version: WN19-SO-000250
Vuln IDs: V-205725
Rule IDs: SV-205725r569188_rule

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.

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".

b

Windows Server 2019 must be configured to audit Logon/Logoff - Account Lockout failures.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000160
Vuln IDs: V-205730
Rule IDs: SV-205730r569188_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. Account Lockout events can be used to identify potentially malicious logon attempts. Satisfies: SRG-OS-000240-GPOS-00090, SRG-OS-000470-GPOS-00214

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.

RMF Control: AU-9
Severity: Medium
CCI: CCI-001494
Version: WN19-AU-000060
Vuln IDs: V-205731
Rule IDs: SV-205731r569188_rule

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

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.

RMF Control: AC-17
Severity: Medium
CCI: CCI-002314
Version: WN19-DC-000410
Vuln IDs: V-205732
Rule IDs: SV-205732r852430_rule

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.

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.

RMF Control: AC-17
Severity: Medium
CCI: CCI-002314
Version: WN19-MS-000120
Vuln IDs: V-205733
Rule IDs: SV-205733r860033_rule

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.

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.

c

Windows Server 2019 permissions on the Active Directory data files must only allow System and Administrators access.

RMF Control: AC-6
Severity: High
CCI: CCI-002235
Version: WN19-DC-000070
Vuln IDs: V-205739
Rule IDs: SV-205739r877392_rule

Improper access permissions for directory data-related files could allow unauthorized users to read, modify, or delete directory data or audit trails.

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

b

Windows Server 2019 Add workstations to domain user right must only be assigned to the Administrators group on domain controllers.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-DC-000350
Vuln IDs: V-205744
Rule IDs: SV-205744r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-DC-000420
Vuln IDs: V-205745
Rule IDs: SV-205745r877392_rule

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.

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

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-MS-000060
Vuln IDs: V-205747
Rule IDs: SV-205747r877392_rule

The Windows SAM stores users' passwords. Restricting Remote Procedure Call (RPC) connections to the SAM to Administrators helps protect those credentials.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-MS-000130
Vuln IDs: V-205748
Rule IDs: SV-205748r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000010
Vuln IDs: V-205749
Rule IDs: SV-205749r877392_rule

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.

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.

RMF Control: AC-6
Severity: High
CCI: CCI-002235
Version: WN19-UR-000020
Vuln IDs: V-205750
Rule IDs: SV-205750r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000040
Vuln IDs: V-205751
Rule IDs: SV-205751r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000050
Vuln IDs: V-205752
Rule IDs: SV-205752r877392_rule

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.

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.

RMF Control: AC-6
Severity: High
CCI: CCI-002235
Version: WN19-UR-000060
Vuln IDs: V-205753
Rule IDs: SV-205753r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000070
Vuln IDs: V-205754
Rule IDs: SV-205754r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000080
Vuln IDs: V-205755
Rule IDs: SV-205755r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000090
Vuln IDs: V-205756
Rule IDs: SV-205756r877392_rule

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.

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.

RMF Control: AC-6
Severity: High
CCI: CCI-002235
Version: WN19-UR-000100
Vuln IDs: V-205757
Rule IDs: SV-205757r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000110
Vuln IDs: V-205758
Rule IDs: SV-205758r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000120
Vuln IDs: V-205759
Rule IDs: SV-205759r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000130
Vuln IDs: V-205760
Rule IDs: SV-205760r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000140
Vuln IDs: V-205761
Rule IDs: SV-205761r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000150
Vuln IDs: V-205762
Rule IDs: SV-205762r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000160
Vuln IDs: V-205763
Rule IDs: SV-205763r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000180
Vuln IDs: V-205764
Rule IDs: SV-205764r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000190
Vuln IDs: V-205765
Rule IDs: SV-205765r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000200
Vuln IDs: V-205766
Rule IDs: SV-205766r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000210
Vuln IDs: V-205767
Rule IDs: SV-205767r877392_rule

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.

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.

RMF Control: AC-6
Severity: Medium
CCI: CCI-002235
Version: WN19-UR-000220
Vuln IDs: V-205768
Rule IDs: SV-205768r877392_rule

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.

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000090
Vuln IDs: V-205769
Rule IDs: SV-205769r852470_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000140
Vuln IDs: V-205770
Rule IDs: SV-205770r852471_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000260
Vuln IDs: V-205771
Rule IDs: SV-205771r852472_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000270
Vuln IDs: V-205772
Rule IDs: SV-205772r852473_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000280
Vuln IDs: V-205773
Rule IDs: SV-205773r852474_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000290
Vuln IDs: V-205774
Rule IDs: SV-205774r852475_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000300
Vuln IDs: V-205775
Rule IDs: SV-205775r852476_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000310
Vuln IDs: V-205776
Rule IDs: SV-205776r852477_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000320
Vuln IDs: V-205777
Rule IDs: SV-205777r852478_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000330
Vuln IDs: V-205778
Rule IDs: SV-205778r852479_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000340
Vuln IDs: V-205779
Rule IDs: SV-205779r852480_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000350
Vuln IDs: V-205780
Rule IDs: SV-205780r852481_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000360
Vuln IDs: V-205781
Rule IDs: SV-205781r852482_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000370
Vuln IDs: V-205782
Rule IDs: SV-205782r852483_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000380
Vuln IDs: V-205783
Rule IDs: SV-205783r852484_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000390
Vuln IDs: V-205784
Rule IDs: SV-205784r852485_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. 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

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 must be configured to audit DS Access - Directory Service Access successes.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-DC-000240
Vuln IDs: V-205791
Rule IDs: SV-205791r852492_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-DC-000250
Vuln IDs: V-205792
Rule IDs: SV-205792r852493_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-DC-000260
Vuln IDs: V-205793
Rule IDs: SV-205793r852494_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. 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

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.

RMF Control: AC-7
Severity: Medium
CCI: CCI-002238
Version: WN19-AC-000010
Vuln IDs: V-205795
Rule IDs: SV-205795r852496_rule

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.

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.

RMF Control: AU-4
Severity: Medium
CCI: CCI-001849
Version: WN19-CC-000270
Vuln IDs: V-205796
Rule IDs: SV-205796r877391_rule

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.

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.

RMF Control: AU-4
Severity: Medium
CCI: CCI-001849
Version: WN19-CC-000280
Vuln IDs: V-205797
Rule IDs: SV-205797r877391_rule

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.

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.

RMF Control: AU-4
Severity: Medium
CCI: CCI-001849
Version: WN19-CC-000290
Vuln IDs: V-205798
Rule IDs: SV-205798r877391_rule

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.

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 must prevent users from changing installation options.

RMF Control: CM-11
Severity: Medium
CCI: CCI-001812
Version: WN19-CC-000420
Vuln IDs: V-205801
Rule IDs: SV-205801r852502_rule

Installation options for applications are typically controlled by administrators. This setting prevents users from changing installation options that may bypass security features.

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.

RMF Control: CM-11
Severity: High
CCI: CCI-001812
Version: WN19-CC-000430
Vuln IDs: V-205802
Rule IDs: SV-205802r852503_rule

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.

Fix: F-6067r355769_fix

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

c

Windows Server 2019 Autoplay must be turned off for non-volume devices.

RMF Control: CM-7
Severity: High
CCI: CCI-001764
Version: WN19-CC-000210
Vuln IDs: V-205804
Rule IDs: SV-205804r852506_rule

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.

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.

RMF Control: CM-7
Severity: High
CCI: CCI-001764
Version: WN19-CC-000220
Vuln IDs: V-205805
Rule IDs: SV-205805r852507_rule

Allowing AutoRun commands to execute may introduce malicious code to a system. Configuring this setting prevents AutoRun commands from executing.

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.

RMF Control: CM-7
Severity: High
CCI: CCI-001764
Version: WN19-CC-000230
Vuln IDs: V-205806
Rule IDs: SV-205806r852508_rule

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.

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 not save passwords in the Remote Desktop Client.

RMF Control: IA-11
Severity: Medium
CCI: CCI-002038
Version: WN19-CC-000340
Vuln IDs: V-205808
Rule IDs: SV-205808r852510_rule

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

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.

RMF Control: IA-11
Severity: Medium
CCI: CCI-002038
Version: WN19-CC-000360
Vuln IDs: V-205809
Rule IDs: SV-205809r852511_rule

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

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.

RMF Control: IA-11
Severity: Medium
CCI: CCI-002038
Version: WN19-CC-000520
Vuln IDs: V-205810
Rule IDs: SV-205810r852512_rule

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

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.

RMF Control: IA-11
Severity: Medium
CCI: CCI-002038
Version: WN19-SO-000380
Vuln IDs: V-205811
Rule IDs: SV-205811r852513_rule

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

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.

RMF Control: IA-11
Severity: Medium
CCI: CCI-002038
Version: WN19-SO-000410
Vuln IDs: V-205812
Rule IDs: SV-205812r852514_rule

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

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.

RMF Control: IA-11
Severity: Medium
CCI: CCI-002038
Version: WN19-SO-000440
Vuln IDs: V-205813
Rule IDs: SV-205813r852515_rule

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

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.

RMF Control: IA-3
Severity: Medium
CCI: CCI-001967
Version: WN19-MS-000040
Vuln IDs: V-205814
Rule IDs: SV-205814r877039_rule

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.

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.

RMF Control: IA-3
Severity: Medium
CCI: CCI-001967
Version: WN19-SO-000090
Vuln IDs: V-205815
Rule IDs: SV-205815r877039_rule

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.

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.

RMF Control: MA-4
Severity: Medium
CCI: CCI-002890
Version: WN19-CC-000480
Vuln IDs: V-205816
Rule IDs: SV-205816r877382_rule

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

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.

RMF Control: MA-4
Severity: Medium
CCI: CCI-002890
Version: WN19-CC-000510
Vuln IDs: V-205817
Rule IDs: SV-205817r877382_rule

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

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".

a

Windows Server 2019 must be configured to ignore NetBIOS name release requests except from WINS servers.

RMF Control: SC-5
Severity: Low
CCI: CCI-002385
Version: WN19-CC-000060
Vuln IDs: V-205819
Rule IDs: SV-205819r852521_rule

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.

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.

RMF Control: SC-8
Severity: Medium
CCI: CCI-002418
Version: WN19-DC-000320
Vuln IDs: V-205820
Rule IDs: SV-205820r916422_rule

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

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.

RMF Control: SC-8
Severity: Medium
CCI: CCI-002418
Version: WN19-SO-000060
Vuln IDs: V-205821
Rule IDs: SV-205821r916422_rule

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

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.

RMF Control: SC-8
Severity: Medium
CCI: CCI-002418
Version: WN19-SO-000070
Vuln IDs: V-205822
Rule IDs: SV-205822r916422_rule

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

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.

RMF Control: SC-8
Severity: Medium
CCI: CCI-002418
Version: WN19-SO-000080
Vuln IDs: V-205823
Rule IDs: SV-205823r916422_rule

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

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.

RMF Control: SC-8
Severity: Medium
CCI: CCI-002418
Version: WN19-SO-000110
Vuln IDs: V-205824
Rule IDs: SV-205824r916422_rule

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

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.

RMF Control: SC-8
Severity: Medium
CCI: CCI-002418
Version: WN19-SO-000160
Vuln IDs: V-205825
Rule IDs: SV-205825r916422_rule

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

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.

RMF Control: SC-8
Severity: Medium
CCI: CCI-002418
Version: WN19-SO-000170
Vuln IDs: V-205826
Rule IDs: SV-205826r916422_rule

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

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.

RMF Control: SC-8
Severity: Medium
CCI: CCI-002418
Version: WN19-SO-000190
Vuln IDs: V-205827
Rule IDs: SV-205827r916422_rule

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

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.

RMF Control: SC-8
Severity: Medium
CCI: CCI-002418
Version: WN19-SO-000200
Vuln IDs: V-205828
Rule IDs: SV-205828r916422_rule

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

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 Explorer Data Execution Prevention must be enabled.

RMF Control: SI-16
Severity: Medium
CCI: CCI-002824
Version: WN19-CC-000310
Vuln IDs: V-205830
Rule IDs: SV-205830r852532_rule

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.

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000070
Vuln IDs: V-205832
Rule IDs: SV-205832r569188_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. Credential Validation records events related to validation tests on credentials for a user account logon.

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000080
Vuln IDs: V-205833
Rule IDs: SV-205833r569188_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. Credential Validation records events related to validation tests on credentials for a user account logon.

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 - Special Logon successes.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000210
Vuln IDs: V-205835
Rule IDs: SV-205835r569188_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. 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

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000220
Vuln IDs: V-205836
Rule IDs: SV-205836r569188_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. Auditing for other object access records events related to the management of task scheduler jobs and COM+ objects.

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000230
Vuln IDs: V-205837
Rule IDs: SV-205837r569188_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. Auditing for other object access records events related to the management of task scheduler jobs and COM+ objects.

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.

RMF Control: AU-12
Severity: Medium
CCI: CCI-000172
Version: WN19-AU-000180
Vuln IDs: V-205838
Rule IDs: SV-205838r569188_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. 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

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 use FIPS-compliant algorithms for encryption, hashing, and signing.

RMF Control: SC-13
Severity: Medium
CCI: CCI-002450
Version: WN19-SO-000360
Vuln IDs: V-205842
Rule IDs: SV-205842r877466_rule

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.

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".

c

Windows Server 2019 must be maintained at a supported servicing level.

RMF Control: CM-6
Severity: High
CCI: CCI-000366
Version: WN19-00-000100
Vuln IDs: V-205849
Rule IDs: SV-205849r569188_rule

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.

Fix: F-6114r355910_fix

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

a

Windows Server 2019 Internet Protocol version 6 (IPv6) source routing must be configured to the highest protection level to prevent IP source routing.

RMF Control: CM-6
Severity: Low
CCI: CCI-000366
Version: WN19-CC-000030
Vuln IDs: V-205858
Rule IDs: SV-205858r569188_rule

Configuring the system to disable IPv6 source routing protects against spoofing.

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.

RMF Control: CM-6
Severity: Low
CCI: CCI-000366
Version: WN19-CC-000040
Vuln IDs: V-205859
Rule IDs: SV-205859r569188_rule

Configuring the system to disable IP source routing protects against spoofing.

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.

RMF Control: CM-6
Severity: Low
CCI: CCI-000366
Version: WN19-CC-000050
Vuln IDs: V-205860
Rule IDs: SV-205860r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000070
Vuln IDs: V-205861
Rule IDs: SV-205861r569188_rule

Insecure guest logons allow unauthenticated access to shared folders. Shared resources on a system must require authentication to establish proper access.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000080
Vuln IDs: V-205862
Rule IDs: SV-205862r857311_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000100
Vuln IDs: V-205863
Rule IDs: SV-205863r569188_rule

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.

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 Early Launch Antimalware, Boot-Start Driver Initialization Policy must prevent boot drivers identified as bad.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000130
Vuln IDs: V-205865
Rule IDs: SV-205865r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000140
Vuln IDs: V-205866
Rule IDs: SV-205866r569188_rule

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.

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).

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000180
Vuln IDs: V-205867
Rule IDs: SV-205867r569188_rule

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).

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).

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000190
Vuln IDs: V-205868
Rule IDs: SV-205868r569188_rule

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).

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000250
Vuln IDs: V-205869
Rule IDs: SV-205869r921945_rule

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.

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.

RMF Control: CM-6
Severity: Low
CCI: CCI-000366
Version: WN19-CC-000260
Vuln IDs: V-205870
Rule IDs: SV-205870r569188_rule

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.

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.

RMF Control: CM-6
Severity: Low
CCI: CCI-000366
Version: WN19-CC-000320
Vuln IDs: V-205871
Rule IDs: SV-205871r569188_rule

Legacy plug-in applications may continue to function when a File Explorer session has become corrupt. Disabling this feature will prevent this.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000330
Vuln IDs: V-205872
Rule IDs: SV-205872r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000390
Vuln IDs: V-205873
Rule IDs: SV-205873r569188_rule

Attachments from RSS feeds may not be secure. This setting will prevent attachments from being downloaded from RSS feeds.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000440
Vuln IDs: V-205874
Rule IDs: SV-205874r569188_rule

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.

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".

b

Windows Server 2019 domain controllers must be configured to allow reset of machine account passwords.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-DC-000330
Vuln IDs: V-205876
Rule IDs: SV-205876r569188_rule

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.

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

Windows Server 2019 must limit the caching of logon credentials to four or less on domain-joined member servers.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-MS-000050
Vuln IDs: V-205906
Rule IDs: SV-205906r857326_rule

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.

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 prevent local accounts with blank passwords from being used from the network.

RMF Control: CM-6
Severity: High
CCI: CCI-000366
Version: WN19-SO-000020
Vuln IDs: V-205908
Rule IDs: SV-205908r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-SO-000030
Vuln IDs: V-205909
Rule IDs: SV-205909r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-SO-000040
Vuln IDs: V-205910
Rule IDs: SV-205910r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-SO-000100
Vuln IDs: V-205911
Rule IDs: SV-205911r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-SO-000150
Vuln IDs: V-205912
Rule IDs: SV-205912r569188_rule

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.

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 enumeration of Security Account Manager (SAM) accounts.

RMF Control: CM-6
Severity: High
CCI: CCI-000366
Version: WN19-SO-000220
Vuln IDs: V-205914
Rule IDs: SV-205914r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-SO-000240
Vuln IDs: V-205915
Rule IDs: SV-205915r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-SO-000260
Vuln IDs: V-205916
Rule IDs: SV-205916r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-SO-000270
Vuln IDs: V-205917
Rule IDs: SV-205917r569188_rule

NTLM sessions that are allowed to fall back to Null (unauthenticated) sessions may gain unauthorized access.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-SO-000280
Vuln IDs: V-205918
Rule IDs: SV-205918r569188_rule

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.

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.

RMF Control: CM-6
Severity: High
CCI: CCI-000366
Version: WN19-SO-000310
Vuln IDs: V-205919
Rule IDs: SV-205919r857347_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-SO-000320
Vuln IDs: V-205920
Rule IDs: SV-205920r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-SO-000330
Vuln IDs: V-205921
Rule IDs: SV-205921r569188_rule

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.

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.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-SO-000340
Vuln IDs: V-205922
Rule IDs: SV-205922r569188_rule

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.

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.

RMF Control: CM-6
Severity: Low
CCI: CCI-000366
Version: WN19-SO-000370
Vuln IDs: V-205923
Rule IDs: SV-205923r569188_rule

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.

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 disable automatically signing in the last interactive user after a system-initiated restart.

RMF Control: CM-6
Severity: Medium
CCI: CCI-000366
Version: WN19-CC-000450
Vuln IDs: V-205925
Rule IDs: SV-205925r877377_rule

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.

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 PowerShell Transcription enabled.

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.

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.