Windows Server 2016 STIG SCAP Benchmark V2R7 (SCAP)

c

Systems must be maintained at a supported servicing level.

RMF Control: CM-6
Severity: H
CCI: CCI-000366
Version: WN16-00-000110
Vuln IDs: V-224828
Rule IDs: SV-224828r991589_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-26507r465387_fix

Update the system to a Version 1607 (Build 14393.xxx) or greater.

c

Local volumes must use a format that supports NTFS attributes.

RMF Control: AC-3
Severity: H
CCI: CCI-000213
Version: WN16-00-000150
Vuln IDs: V-224831
Rule IDs: SV-224831r958472_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-26510r465396_fix

Format volumes to use NTFS or ReFS.

b

The Fax Server role must not be installed.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-00-000350
Vuln IDs: V-224850
Rule IDs: SV-224850r958478_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-26529r465453_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

The Microsoft FTP service must not be installed unless required.

RMF Control: CM-7
Severity: M
CCI: CCI-000382
Version: WN16-00-000360
Vuln IDs: V-224851
Rule IDs: SV-224851r958480_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-26530r465456_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

The Peer Name Resolution Protocol must not be installed.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-00-000370
Vuln IDs: V-224852
Rule IDs: SV-224852r958478_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-26531r465459_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

Simple TCP/IP Services must not be installed.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-00-000380
Vuln IDs: V-224853
Rule IDs: SV-224853r958478_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-26532r465462_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

The Telnet Client must not be installed.

RMF Control: CM-7
Severity: M
CCI: CCI-000382
Version: WN16-00-000390
Vuln IDs: V-224854
Rule IDs: SV-224854r958480_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-26533r465465_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

The TFTP Client must not be installed.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-00-000400
Vuln IDs: V-224855
Rule IDs: SV-224855r958478_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-26534r465468_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

The Server Message Block (SMB) v1 protocol must be uninstalled.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-00-000410
Vuln IDs: V-224856
Rule IDs: SV-224856r958478_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-26535r465471_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

The Server Message Block (SMB) v1 protocol must be disabled on the SMB server.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-00-000411
Vuln IDs: V-224857
Rule IDs: SV-224857r958478_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-26536r465474_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

The Server Message Block (SMB) v1 protocol must be disabled on the SMB client.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-00-000412
Vuln IDs: V-224858
Rule IDs: SV-224858r958478_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-26537r465477_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 PowerShell 2.0 must not be installed.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-00-000420
Vuln IDs: V-224859
Rule IDs: SV-224859r958478_rule

Windows PowerShell 5.0 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 5.0 script block logging feature.

Fix: F-26538r465480_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 2016 account lockout duration must be configured to 15 minutes or greater.

RMF Control: AC-7
Severity: M
CCI: CCI-002238
Version: WN16-AC-000010
Vuln IDs: V-224866
Rule IDs: SV-224866r958736_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-26545r465501_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 2016 must have the number of allowed bad logon attempts configured to three or less.

RMF Control: AC-7
Severity: M
CCI: CCI-000044
Version: WN16-AC-000020
Vuln IDs: V-224867
Rule IDs: SV-224867r958388_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-26546r465504_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 2016 must have the period of time before the bad logon counter is reset configured to 15 minutes or greater.

RMF Control: AC-7
Severity: M
CCI: CCI-000044
Version: WN16-AC-000030
Vuln IDs: V-224868
Rule IDs: SV-224868r958388_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-26547r465507_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 2016 password history must be configured to 24 passwords remembered.

RMF Control: IA-5
Severity: M
CCI: CCI-000200
Version: WN16-AC-000040
Vuln IDs: V-224869
Rule IDs: SV-224869r982201_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-26548r465510_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 2016 maximum password age must be configured to 60 days or less.

RMF Control: IA-5
Severity: M
CCI: CCI-000199
Version: WN16-AC-000050
Vuln IDs: V-224870
Rule IDs: SV-224870r982200_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-26549r465513_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 2016 minimum password age must be configured to at least one day.

RMF Control: IA-5
Severity: M
CCI: CCI-000198
Version: WN16-AC-000060
Vuln IDs: V-224871
Rule IDs: SV-224871r982188_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-26550r465516_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 2016 minimum password length must be configured to 14 characters.

RMF Control: IA-5
Severity: M
CCI: CCI-000205
Version: WN16-AC-000070
Vuln IDs: V-224872
Rule IDs: SV-224872r982202_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-26551r465519_fix

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

b

Windows Server 2016 must have the built-in Windows password complexity policy enabled.

RMF Control: IA-5
Severity: M
CCI: CCI-000192
Version: WN16-AC-000080
Vuln IDs: V-224873
Rule IDs: SV-224873r982195_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, upper- and lower-case 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-26552r465522_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 2016 reversible password encryption must be disabled.

RMF Control: IA-5
Severity: H
CCI: CCI-000196
Version: WN16-AC-000090
Vuln IDs: V-224874
Rule IDs: SV-224874r982199_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-26553r465525_fix

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

b

Permissions for the Application event log must prevent access by non-privileged accounts.

RMF Control: AU-9
Severity: M
CCI: CCI-000162
Version: WN16-AU-000030
Vuln IDs: V-224877
Rule IDs: SV-224877r958434_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-26556r465534_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

Permissions for the Security event log must prevent access by non-privileged accounts.

RMF Control: AU-9
Severity: M
CCI: CCI-000162
Version: WN16-AU-000040
Vuln IDs: V-224878
Rule IDs: SV-224878r958434_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-26557r465537_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

Permissions for the System event log must prevent access by non-privileged accounts.

RMF Control: AU-9
Severity: M
CCI: CCI-000162
Version: WN16-AU-000050
Vuln IDs: V-224879
Rule IDs: SV-224879r958434_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-26558r465540_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

Event Viewer must be protected from unauthorized modification and deletion.

RMF Control: AU-9
Severity: M
CCI: CCI-001494
Version: WN16-AU-000060
Vuln IDs: V-224880
Rule IDs: SV-224880r991558_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-26559r465543_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 2016 must be configured to audit Account Logon - Credential Validation successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000070
Vuln IDs: V-224881
Rule IDs: SV-224881r991578_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-26560r465546_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 2016 must be configured to audit Account Logon - Credential Validation failures.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000080
Vuln IDs: V-224882
Rule IDs: SV-224882r991578_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-26561r465549_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 2016 must be configured to audit Account Management - Other Account Management Events successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000100
Vuln IDs: V-224883
Rule IDs: SV-224883r958732_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-26562r465552_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 2016 must be configured to audit Account Management - Security Group Management successes.

RMF Control: AC-2
Severity: M
CCI: CCI-000018
Version: WN16-AU-000120
Vuln IDs: V-224884
Rule IDs: SV-224884r958368_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-26563r465555_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 2016 must be configured to audit Account Management - User Account Management successes.

RMF Control: AC-2
Severity: M
CCI: CCI-000018
Version: WN16-AU-000140
Vuln IDs: V-224885
Rule IDs: SV-224885r958368_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-26564r465558_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 2016 must be configured to audit Account Management - User Account Management failures.

RMF Control: AC-2
Severity: M
CCI: CCI-000018
Version: WN16-AU-000150
Vuln IDs: V-224886
Rule IDs: SV-224886r958368_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-26565r465561_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 2016 must be configured to audit Detailed Tracking - Process Creation successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000170
Vuln IDs: V-224888
Rule IDs: SV-224888r958732_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-26567r465567_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 2016 must be configured to audit Logon/Logoff - Account Lockout failures.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000230
Vuln IDs: V-224890
Rule IDs: SV-224890r991552_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-26569r465573_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 2016 must be configured to audit Logon/Logoff - Logoff successes.

RMF Control: AC-17
Severity: M
CCI: CCI-000067
Version: WN16-AU-000250
Vuln IDs: V-224892
Rule IDs: SV-224892r958406_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-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-26571r465579_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 2016 must be configured to audit Logon/Logoff - Logon successes.

RMF Control: AC-17
Severity: M
CCI: CCI-000067
Version: WN16-AU-000260
Vuln IDs: V-224893
Rule IDs: SV-224893r958406_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-26572r465582_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 2016 must be configured to audit Logon/Logoff - Logon failures.

RMF Control: AC-17
Severity: M
CCI: CCI-000067
Version: WN16-AU-000270
Vuln IDs: V-224894
Rule IDs: SV-224894r958406_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-26573r465585_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 2016 must be configured to audit Logon/Logoff - Special Logon successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000280
Vuln IDs: V-224895
Rule IDs: SV-224895r991578_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-26574r465588_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 2016 must be configured to audit Object Access - Other Object Access Events successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000285
Vuln IDs: V-224896
Rule IDs: SV-224896r991578_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-26575r465591_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 2016 must be configured to audit Object Access - Other Object Access Events failures.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000286
Vuln IDs: V-224897
Rule IDs: SV-224897r991578_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-26576r465594_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 2016 must be configured to audit Policy Change - Audit Policy Change successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000310
Vuln IDs: V-224900
Rule IDs: SV-224900r958732_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-26579r465603_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 2016 must be configured to audit Policy Change - Audit Policy Change failures.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000320
Vuln IDs: V-224901
Rule IDs: SV-224901r958732_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-26580r465606_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 2016 must be configured to audit Policy Change - Authentication Policy Change successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000330
Vuln IDs: V-224902
Rule IDs: SV-224902r958732_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-26581r465609_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 2016 must be configured to audit Policy Change - Authorization Policy Change successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000340
Vuln IDs: V-224903
Rule IDs: SV-224903r958732_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-26582r465612_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 2016 must be configured to audit Privilege Use - Sensitive Privilege Use successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000350
Vuln IDs: V-224904
Rule IDs: SV-224904r958732_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-26583r465615_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 2016 must be configured to audit Privilege Use - Sensitive Privilege Use failures.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000360
Vuln IDs: V-224905
Rule IDs: SV-224905r958732_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-26584r465618_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 2016 must be configured to audit System - IPsec Driver successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000370
Vuln IDs: V-224906
Rule IDs: SV-224906r958732_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-26585r465621_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 2016 must be configured to audit System - IPsec Driver failures.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000380
Vuln IDs: V-224907
Rule IDs: SV-224907r958732_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-26586r465624_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 2016 must be configured to audit System - Other System Events successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000390
Vuln IDs: V-224908
Rule IDs: SV-224908r958732_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-26587r465627_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 2016 must be configured to audit System - Other System Events failures.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000400
Vuln IDs: V-224909
Rule IDs: SV-224909r958732_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-26588r465630_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 2016 must be configured to audit System - Security State Change successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000410
Vuln IDs: V-224910
Rule IDs: SV-224910r958732_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-26589r465633_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 2016 must be configured to audit System - Security System Extension successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000420
Vuln IDs: V-224911
Rule IDs: SV-224911r958732_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-26590r465636_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 2016 must be configured to audit System - System Integrity successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000440
Vuln IDs: V-224912
Rule IDs: SV-224912r958732_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-26591r465639_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 2016 must be configured to audit System - System Integrity failures.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-AU-000450
Vuln IDs: V-224913
Rule IDs: SV-224913r958732_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-26592r465642_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

The display of slide shows on the lock screen must be disabled.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-CC-000010
Vuln IDs: V-224914
Rule IDs: SV-224914r958478_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-26593r465645_fix

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

b

WDigest Authentication must be disabled on Windows Server 2016.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-CC-000030
Vuln IDs: V-224915
Rule IDs: SV-224915r958478_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 2016. This setting ensures this is enforced.

Fix: F-26594r465648_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.

a

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: L
CCI: CCI-000366
Version: WN16-CC-000040
Vuln IDs: V-224916
Rule IDs: SV-224916r991589_rule

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

Fix: F-26595r465651_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

Source routing must be configured to the highest protection level to prevent Internet Protocol (IP) source routing.

RMF Control: CM-6
Severity: L
CCI: CCI-000366
Version: WN16-CC-000050
Vuln IDs: V-224917
Rule IDs: SV-224917r991589_rule

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

Fix: F-26596r465654_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 2016 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: L
CCI: CCI-000366
Version: WN16-CC-000060
Vuln IDs: V-224918
Rule IDs: SV-224918r991589_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-26597r465657_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.

a

Windows Server 2016 must be configured to ignore NetBIOS name release requests except from WINS servers.

RMF Control: SC-5
Severity: L
CCI: CCI-002385
Version: WN16-CC-000070
Vuln IDs: V-224919
Rule IDs: SV-224919r958902_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-26598r465660_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

Insecure logons to an SMB server must be disabled.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-CC-000080
Vuln IDs: V-224920
Rule IDs: SV-224920r991589_rule

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

Fix: F-26599r465663_fix

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

b

Hardened UNC paths must be defined to require mutual authentication and integrity for at least the \\*\SYSVOL and \\*\NETLOGON shares.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-CC-000090
Vuln IDs: V-224921
Rule IDs: SV-224921r991589_rule

Additional security requirements are applied to Universal Naming Convention (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-26600r465666_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

Command line data must be included in process creation events.

RMF Control: AU-3
Severity: M
CCI: CCI-000135
Version: WN16-CC-000100
Vuln IDs: V-224922
Rule IDs: SV-224922r958422_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-26601r465669_fix

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

b

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

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-CC-000140
Vuln IDs: V-224924
Rule IDs: SV-224924r991589_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-26603r465675_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

Group Policy objects must be reprocessed even if they have not changed.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-CC-000150
Vuln IDs: V-224925
Rule IDs: SV-224925r991589_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-26604r465678_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

Downloading print driver packages over HTTP must be prevented.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-CC-000160
Vuln IDs: V-224926
Rule IDs: SV-224926r958478_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-26605r465681_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

Printing over HTTP must be prevented.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-CC-000170
Vuln IDs: V-224927
Rule IDs: SV-224927r958478_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-26606r465684_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

The network selection user interface (UI) must not be displayed on the logon screen.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-CC-000180
Vuln IDs: V-224928
Rule IDs: SV-224928r958478_rule

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

Fix: F-26607r465687_fix

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

b

Users must be prompted to authenticate when the system wakes from sleep (on battery).

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-CC-000210
Vuln IDs: V-224929
Rule IDs: SV-224929r991589_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-26608r465690_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

Users must be prompted to authenticate when the system wakes from sleep (plugged in).

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-CC-000220
Vuln IDs: V-224930
Rule IDs: SV-224930r991589_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-26609r465693_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".

a

The Application Compatibility Program Inventory must be prevented from collecting data and sending the information to Microsoft.

RMF Control: CM-7
Severity: L
CCI: CCI-000381
Version: WN16-CC-000240
Vuln IDs: V-224931
Rule IDs: SV-224931r958478_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-26610r465696_fix

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

c

AutoPlay must be turned off for non-volume devices.

RMF Control: CM-7
Severity: H
CCI: CCI-001764
Version: WN16-CC-000250
Vuln IDs: V-224932
Rule IDs: SV-224932r958804_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-26611r465699_fix

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

c

The default AutoRun behavior must be configured to prevent AutoRun commands.

RMF Control: CM-7
Severity: H
CCI: CCI-001764
Version: WN16-CC-000260
Vuln IDs: V-224933
Rule IDs: SV-224933r958804_rule

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

Fix: F-26612r465702_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

AutoPlay must be disabled for all drives.

RMF Control: CM-7
Severity: H
CCI: CCI-001764
Version: WN16-CC-000270
Vuln IDs: V-224934
Rule IDs: SV-224934r958804_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-26613r465705_fix

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

b

Administrator accounts must not be enumerated during elevation.

RMF Control: SC-3
Severity: M
CCI: CCI-001084
Version: WN16-CC-000280
Vuln IDs: V-224935
Rule IDs: SV-224935r958518_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-26614r465708_fix

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

b

Windows Telemetry must be configured to Security or Basic.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-CC-000290
Vuln IDs: V-224936
Rule IDs: SV-224936r991589_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-26615r465711_fix

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

b

The Application event log size must be configured to 32768 KB or greater.

RMF Control: AU-4
Severity: M
CCI: CCI-001849
Version: WN16-CC-000300
Vuln IDs: V-224937
Rule IDs: SV-224937r958752_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-26616r465714_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

The Security event log size must be configured to 196608 KB or greater.

RMF Control: AU-4
Severity: M
CCI: CCI-001849
Version: WN16-CC-000310
Vuln IDs: V-224938
Rule IDs: SV-224938r958752_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-26617r465717_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

The System event log size must be configured to 32768 KB or greater.

RMF Control: AU-4
Severity: M
CCI: CCI-001849
Version: WN16-CC-000320
Vuln IDs: V-224939
Rule IDs: SV-224939r958752_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-26618r465720_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 2016 Windows SmartScreen must be enabled.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-CC-000330
Vuln IDs: V-224940
Rule IDs: SV-224940r958478_rule

Windows SmartScreen helps protect systems from programs downloaded from the internet that may be malicious. Enabling SmartScreen will warn users of potentially malicious programs.

Fix: F-26619r465723_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> File Explorer >> "Configure Windows SmartScreen" to "Enabled".

b

Explorer Data Execution Prevention must be enabled.

RMF Control: SI-16
Severity: M
CCI: CCI-002824
Version: WN16-CC-000340
Vuln IDs: V-224941
Rule IDs: SV-224941r958928_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-26620r465726_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".

a

Turning off File Explorer heap termination on corruption must be disabled.

RMF Control: CM-6
Severity: L
CCI: CCI-000366
Version: WN16-CC-000350
Vuln IDs: V-224942
Rule IDs: SV-224942r991589_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-26621r465729_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

File Explorer shell protocol must run in protected mode.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-CC-000360
Vuln IDs: V-224943
Rule IDs: SV-224943r991589_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-26622r465732_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

Passwords must not be saved in the Remote Desktop Client.

RMF Control: IA-11
Severity: M
CCI: CCI-002038
Version: WN16-CC-000370
Vuln IDs: V-224944
Rule IDs: SV-224944r1001261_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-26623r465735_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

Local drives must be prevented from sharing with Remote Desktop Session Hosts.

RMF Control: SC-4
Severity: M
CCI: CCI-001090
Version: WN16-CC-000380
Vuln IDs: V-224945
Rule IDs: SV-224945r958524_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-26624r465738_fix

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

b

Remote Desktop Services must always prompt a client for passwords upon connection.

RMF Control: IA-11
Severity: M
CCI: CCI-002038
Version: WN16-CC-000390
Vuln IDs: V-224946
Rule IDs: SV-224946r1001261_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-26625r465741_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

The Remote Desktop Session Host must require secure Remote Procedure Call (RPC) communications.

RMF Control: AC-17
Severity: M
CCI: CCI-001453
Version: WN16-CC-000400
Vuln IDs: V-224947
Rule IDs: SV-224947r991554_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.

Fix: F-26626r465744_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

Remote Desktop Services must be configured with the client connection encryption set to High Level.

RMF Control: AC-17
Severity: M
CCI: CCI-001453
Version: WN16-CC-000410
Vuln IDs: V-224948
Rule IDs: SV-224948r991554_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.

Fix: F-26627r465747_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

Attachments must be prevented from being downloaded from RSS feeds.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-CC-000420
Vuln IDs: V-224949
Rule IDs: SV-224949r991589_rule

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

Fix: F-26628r465750_fix

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

b

Basic authentication for RSS feeds over HTTP must not be used.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-CC-000430
Vuln IDs: V-224951
Rule IDs: SV-224951r958478_rule

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

Fix: F-26630r465756_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

Indexing of encrypted files must be turned off.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-CC-000440
Vuln IDs: V-224952
Rule IDs: SV-224952r958478_rule

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

Fix: F-26631r465759_fix

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

b

Users must be prevented from changing installation options.

RMF Control: CM-11
Severity: M
CCI: CCI-001812
Version: WN16-CC-000450
Vuln IDs: V-224953
Rule IDs: SV-224953r982210_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-26632r465762_fix

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

c

The Windows Installer Always install with elevated privileges option must be disabled.

RMF Control: CM-11
Severity: H
CCI: CCI-001812
Version: WN16-CC-000460
Vuln IDs: V-224954
Rule IDs: SV-224954r982210_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-26633r465765_fix

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

b

Users must be notified if a web-based program attempts to install software.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-CC-000470
Vuln IDs: V-224955
Rule IDs: SV-224955r991589_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-26634r465768_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

Automatically signing in the last interactive user after a system-initiated restart must be disabled.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-CC-000480
Vuln IDs: V-224956
Rule IDs: SV-224956r991591_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-26635r465771_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

PowerShell script block logging must be enabled.

RMF Control: AU-3
Severity: M
CCI: CCI-000135
Version: WN16-CC-000490
Vuln IDs: V-224957
Rule IDs: SV-224957r958422_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-26636r465774_fix

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

c

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

RMF Control: MA-4
Severity: H
CCI: CCI-000877
Version: WN16-CC-000500
Vuln IDs: V-224958
Rule IDs: SV-224958r958510_rule

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

Fix: F-26637r465777_fix

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

b

The Windows Remote Management (WinRM) client must not allow unencrypted traffic.

RMF Control: MA-4
Severity: M
CCI: CCI-002890
Version: WN16-CC-000510
Vuln IDs: V-224959
Rule IDs: SV-224959r958848_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-26638r465780_fix

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

b

The Windows Remote Management (WinRM) client must not use Digest authentication.

RMF Control: MA-4
Severity: M
CCI: CCI-000877
Version: WN16-CC-000520
Vuln IDs: V-224960
Rule IDs: SV-224960r958510_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-26639r465783_fix

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

c

The Windows Remote Management (WinRM) service must not use Basic authentication.

RMF Control: MA-4
Severity: H
CCI: CCI-000877
Version: WN16-CC-000530
Vuln IDs: V-224961
Rule IDs: SV-224961r958510_rule

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

Fix: F-26640r465786_fix

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

b

The Windows Remote Management (WinRM) service must not allow unencrypted traffic.

RMF Control: MA-4
Severity: M
CCI: CCI-002890
Version: WN16-CC-000540
Vuln IDs: V-224962
Rule IDs: SV-224962r958848_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-26641r465789_fix

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

b

The Windows Remote Management (WinRM) service must not store RunAs credentials.

RMF Control: IA-11
Severity: M
CCI: CCI-002038
Version: WN16-CC-000550
Vuln IDs: V-224963
Rule IDs: SV-224963r1001261_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-26642r465792_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

Kerberos user logon restrictions must be enforced.

RMF Control: IA-2
Severity: M
CCI: CCI-001941
Version: WN16-DC-000020
Vuln IDs: V-224965
Rule IDs: SV-224965r958494_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-26644r465798_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

The Kerberos service ticket maximum lifetime must be limited to 600 minutes or less.

RMF Control: IA-2
Severity: M
CCI: CCI-001941
Version: WN16-DC-000030
Vuln IDs: V-224966
Rule IDs: SV-224966r958494_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-26645r465801_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

The Kerberos user ticket lifetime must be limited to 10 hours or less.

RMF Control: IA-2
Severity: M
CCI: CCI-001941
Version: WN16-DC-000040
Vuln IDs: V-224967
Rule IDs: SV-224967r958494_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-26646r465804_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

The Kerberos policy user ticket renewal maximum lifetime must be limited to seven days or less.

RMF Control: IA-2
Severity: M
CCI: CCI-001941
Version: WN16-DC-000050
Vuln IDs: V-224968
Rule IDs: SV-224968r958494_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-26647r465807_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

The computer clock synchronization tolerance must be limited to 5 minutes or less.

RMF Control: IA-2
Severity: M
CCI: CCI-001941
Version: WN16-DC-000060
Vuln IDs: V-224969
Rule IDs: SV-224969r958494_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-26648r465810_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.

c

Permissions on the Active Directory data files must only allow System and Administrators access.

RMF Control: AC-6
Severity: H
CCI: CCI-002235
Version: WN16-DC-000070
Vuln IDs: V-224970
Rule IDs: SV-224970r958726_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-26649r465813_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 2016 must be configured to audit DS Access - Directory Service Access successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-DC-000240
Vuln IDs: V-224987
Rule IDs: SV-224987r958732_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-26666r465864_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 2016 must be configured to audit DS Access - Directory Service Access failures.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-DC-000250
Vuln IDs: V-224988
Rule IDs: SV-224988r958732_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-26667r465867_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 2016 must be configured to audit DS Access - Directory Service Changes successes.

RMF Control: AU-12
Severity: M
CCI: CCI-000172
Version: WN16-DC-000260
Vuln IDs: V-224989
Rule IDs: SV-224989r958732_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-26668r465870_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

Domain controllers must require LDAP access signing.

RMF Control: SC-8
Severity: M
CCI: CCI-002418
Version: WN16-DC-000320
Vuln IDs: V-224995
Rule IDs: SV-224995r958908_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-26674r465888_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

Domain controllers must be configured to allow reset of machine account passwords.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-DC-000330
Vuln IDs: V-224996
Rule IDs: SV-224996r991589_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-26675r465891_fix

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

b

The 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: M
CCI: CCI-000213
Version: WN16-DC-000340
Vuln IDs: V-224997
Rule IDs: SV-224997r958472_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-26676r465894_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

The Add workstations to domain user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-DC-000350
Vuln IDs: V-224998
Rule IDs: SV-224998r958726_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-26677r465897_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

The Allow log on through Remote Desktop Services user right must only be assigned to the Administrators group.

RMF Control: AC-3
Severity: M
CCI: CCI-000213
Version: WN16-DC-000360
Vuln IDs: V-224999
Rule IDs: SV-224999r958472_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-26678r465900_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

The 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: M
CCI: CCI-000213
Version: WN16-DC-000370
Vuln IDs: V-225000
Rule IDs: SV-225000r958472_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-26679r465903_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

The Deny log on as a batch job user right on domain controllers must be configured to prevent unauthenticated access.

RMF Control: AC-3
Severity: M
CCI: CCI-000213
Version: WN16-DC-000380
Vuln IDs: V-225001
Rule IDs: SV-225001r958472_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-26680r465906_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

The 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: M
CCI: CCI-000213
Version: WN16-DC-000390
Vuln IDs: V-225002
Rule IDs: SV-225002r958472_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-26681r465909_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

The Deny log on locally user right on domain controllers must be configured to prevent unauthenticated access.

RMF Control: AC-3
Severity: M
CCI: CCI-000213
Version: WN16-DC-000400
Vuln IDs: V-225003
Rule IDs: SV-225003r958472_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-26682r465912_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

The Deny log on through Remote Desktop Services user right on domain controllers must be configured to prevent unauthenticated access.

RMF Control: AC-17
Severity: M
CCI: CCI-002314
Version: WN16-DC-000410
Vuln IDs: V-225004
Rule IDs: SV-225004r958672_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-26683r465915_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

The 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: M
CCI: CCI-002235
Version: WN16-DC-000420
Vuln IDs: V-225005
Rule IDs: SV-225005r958726_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-26684r465918_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

Local administrator accounts must have their privileged token filtered to prevent elevated privileges from being used over the network on domain systems.

RMF Control: SC-3
Severity: M
CCI: CCI-001084
Version: WN16-MS-000020
Vuln IDs: V-225008
Rule IDs: SV-225008r958518_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-26687r857257_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

Local users on domain-joined computers must not be enumerated.

RMF Control: CM-7
Severity: M
CCI: CCI-000381
Version: WN16-MS-000030
Vuln IDs: V-225009
Rule IDs: SV-225009r958478_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-26688r465930_fix

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

b

Unauthenticated Remote Procedure Call (RPC) clients must be restricted from connecting to the RPC server.

RMF Control: IA-3
Severity: M
CCI: CCI-001967
Version: WN16-MS-000040
Vuln IDs: V-225010
Rule IDs: SV-225010r971545_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-26689r465933_fix

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

b

Caching of logon credentials must be limited.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-MS-000050
Vuln IDs: V-225011
Rule IDs: SV-225011r991589_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-26690r465936_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.

b

Remote calls to the Security Account Manager (SAM) must be restricted to Administrators.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-MS-000310
Vuln IDs: V-225013
Rule IDs: SV-225013r958726_rule

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

Fix: F-26692r857269_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

The "Access this computer from the network" user right must only be assigned to the Administrators and Authenticated Users groups on member servers.

RMF Control: AC-3
Severity: M
CCI: CCI-000213
Version: WN16-MS-000340
Vuln IDs: V-225014
Rule IDs: SV-225014r958472_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-26693r465945_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

The "Deny access to this computer from the network" user right on member servers must be configured to prevent access from highly privileged domain accounts and local accounts on domain systems and from unauthenticated access on all systems.

RMF Control: AC-3
Severity: M
CCI: CCI-000213
Version: WN16-MS-000370
Vuln IDs: V-225015
Rule IDs: SV-225015r958472_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-26694r465948_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

The "Deny log on as a batch job" user right on member servers must be configured to prevent access from highly privileged domain accounts on domain systems and from unauthenticated access on all systems.

RMF Control: AC-3
Severity: M
CCI: CCI-000213
Version: WN16-MS-000380
Vuln IDs: V-225016
Rule IDs: SV-225016r958472_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-26695r465951_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

The "Deny log on as a service" user right on member servers must be configured to prevent access from highly privileged domain accounts on domain systems. No other groups or accounts must be assigned this right.

RMF Control: AC-3
Severity: M
CCI: CCI-000213
Version: WN16-MS-000390
Vuln IDs: V-225017
Rule IDs: SV-225017r958472_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-26696r465954_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

The "Deny log on locally" user right on member servers must be configured to prevent access from highly privileged domain accounts on domain systems and from unauthenticated access on all systems.

RMF Control: AC-3
Severity: M
CCI: CCI-000213
Version: WN16-MS-000400
Vuln IDs: V-225018
Rule IDs: SV-225018r958472_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-26697r465957_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

The "Deny log on through Remote Desktop Services" user right on member servers must be configured to prevent access from highly privileged domain accounts and all local accounts on domain systems and from unauthenticated access on all systems.

RMF Control: AC-17
Severity: M
CCI: CCI-002314
Version: WN16-MS-000410
Vuln IDs: V-225019
Rule IDs: SV-225019r958672_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-26698r465960_fix

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

b

The "Enable computer and user accounts to be trusted for delegation" user right must not be assigned to any groups or accounts on member servers.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-MS-000420
Vuln IDs: V-225020
Rule IDs: SV-225020r958726_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-26699r465963_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

The DoD Root CA certificates must be installed in the Trusted Root Store.

RMF Control: IA-5
Severity: M
CCI: CCI-000185
Version: WN16-PK-000010
Vuln IDs: V-225021
Rule IDs: SV-225021r958448_rule

To ensure secure DoD websites and DoD-signed code are properly validated, the system must trust the DoD Root Certificate Authorities (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-26700r951118_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

The DoD Interoperability Root CA cross-certificates must be installed in the Untrusted Certificates Store on unclassified systems.

RMF Control: IA-5
Severity: M
CCI: CCI-000185
Version: WN16-PK-000020
Vuln IDs: V-225022
Rule IDs: SV-225022r958448_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-26701r890510_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 The certificates can be installed using the InstallRoot tool. The 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

The US DoD CCEB Interoperability Root CA cross-certificates must be installed in the Untrusted Certificates Store on unclassified systems.

RMF Control: IA-5
Severity: M
CCI: CCI-000185
Version: WN16-PK-000030
Vuln IDs: V-225023
Rule IDs: SV-225023r958448_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-26702r890513_fix

Install the US DoD CCEB Interoperability Root CA cross-certificate on unclassified systems. Subject: CN=DoD Root CA 3, OU=PKI, OU=DoD, O=U.S. Government, C=US Issuer: CN=US DoD CCEB Interoperability Root CA 2, OU=PKI, OU=DoD, O=U.S. Government, C=US Thumbprint: 9B74964506C7ED9138070D08D5F8B969866560C8 NotAfter: 7/18/2025 The certificates can be installed using the InstallRoot tool. The 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 2016 built-in guest account must be disabled.

RMF Control: IA-8
Severity: M
CCI: CCI-000804
Version: WN16-SO-000010
Vuln IDs: V-225024
Rule IDs: SV-225024r958504_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-26703r465975_fix

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

c

Local accounts with blank passwords must be restricted to prevent access from the network.

RMF Control: CM-6
Severity: H
CCI: CCI-000366
Version: WN16-SO-000020
Vuln IDs: V-225025
Rule IDs: SV-225025r991589_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-26704r465978_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 2016 built-in administrator account must be renamed.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-SO-000030
Vuln IDs: V-225026
Rule IDs: SV-225026r991589_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-26705r465981_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 2016 built-in guest account must be renamed.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-SO-000040
Vuln IDs: V-225027
Rule IDs: SV-225027r991589_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-26706r465984_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

Audit policy using subcategories must be enabled.

RMF Control: AU-12
Severity: M
CCI: CCI-000169
Version: WN16-SO-000050
Vuln IDs: V-225028
Rule IDs: SV-225028r958442_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-26707r465987_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

The setting Domain member: Digitally encrypt or sign secure channel data (always) must be configured to Enabled.

RMF Control: SC-8
Severity: M
CCI: CCI-002418
Version: WN16-SO-000080
Vuln IDs: V-225029
Rule IDs: SV-225029r958908_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-26708r465990_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

The setting Domain member: Digitally encrypt secure channel data (when possible) must be configured to enabled.

RMF Control: SC-8
Severity: M
CCI: CCI-002418
Version: WN16-SO-000090
Vuln IDs: V-225030
Rule IDs: SV-225030r958908_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-26709r465993_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

The setting Domain member: Digitally sign secure channel data (when possible) must be configured to Enabled.

RMF Control: SC-8
Severity: M
CCI: CCI-002418
Version: WN16-SO-000100
Vuln IDs: V-225031
Rule IDs: SV-225031r958908_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-26710r465996_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

The computer account password must not be prevented from being reset.

RMF Control: IA-3
Severity: M
CCI: CCI-001967
Version: WN16-SO-000110
Vuln IDs: V-225032
Rule IDs: SV-225032r971545_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-26711r465999_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

The maximum age for machine account passwords must be configured to 30 days or less.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-SO-000120
Vuln IDs: V-225033
Rule IDs: SV-225033r991589_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-26712r466002_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 2016 must be configured to require a strong session key.

RMF Control: SC-8
Severity: M
CCI: CCI-002418
Version: WN16-SO-000130
Vuln IDs: V-225034
Rule IDs: SV-225034r958908_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-26713r466005_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

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

RMF Control: AC-11
Severity: M
CCI: CCI-000057
Version: WN16-SO-000140
Vuln IDs: V-225035
Rule IDs: SV-225035r958402_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.

Fix: F-26714r466008_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

The Smart Card removal option must be configured to Force Logoff or Lock Workstation.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-SO-000180
Vuln IDs: V-225038
Rule IDs: SV-225038r991589_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-26717r466017_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".

b

The setting Microsoft network client: Digitally sign communications (always) must be configured to Enabled.

RMF Control: SC-8
Severity: M
CCI: CCI-002418
Version: WN16-SO-000190
Vuln IDs: V-225039
Rule IDs: SV-225039r958908_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-26718r466020_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

The setting Microsoft network client: Digitally sign communications (if server agrees) must be configured to Enabled.

RMF Control: SC-8
Severity: M
CCI: CCI-002418
Version: WN16-SO-000200
Vuln IDs: V-225040
Rule IDs: SV-225040r958908_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-26719r466023_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

Unencrypted passwords must not be sent to third-party Server Message Block (SMB) servers.

RMF Control: IA-5
Severity: M
CCI: CCI-000197
Version: WN16-SO-000210
Vuln IDs: V-225041
Rule IDs: SV-225041r987796_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-26720r466026_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

The setting Microsoft network server: Digitally sign communications (always) must be configured to Enabled.

RMF Control: SC-8
Severity: M
CCI: CCI-002418
Version: WN16-SO-000230
Vuln IDs: V-225042
Rule IDs: SV-225042r958908_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-26721r466029_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

The setting Microsoft network server: Digitally sign communications (if client agrees) must be configured to Enabled.

RMF Control: SC-8
Severity: M
CCI: CCI-002418
Version: WN16-SO-000240
Vuln IDs: V-225043
Rule IDs: SV-225043r958908_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-26722r466032_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".

c

Anonymous enumeration of Security Account Manager (SAM) accounts must not be allowed.

RMF Control: CM-6
Severity: H
CCI: CCI-000366
Version: WN16-SO-000260
Vuln IDs: V-225045
Rule IDs: SV-225045r991589_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-26724r466038_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".

c

Anonymous enumeration of shares must not be allowed.

RMF Control: SC-4
Severity: H
CCI: CCI-001090
Version: WN16-SO-000270
Vuln IDs: V-225046
Rule IDs: SV-225046r958524_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-26725r466041_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".

b

Windows Server 2016 must be configured to prevent anonymous users from having the same permissions as the Everyone group.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-SO-000290
Vuln IDs: V-225047
Rule IDs: SV-225047r991589_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-26726r466044_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".

c

Anonymous access to Named Pipes and Shares must be restricted.

RMF Control: SC-4
Severity: H
CCI: CCI-001090
Version: WN16-SO-000300
Vuln IDs: V-225048
Rule IDs: SV-225048r958524_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-26727r466047_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

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: M
CCI: CCI-000366
Version: WN16-SO-000320
Vuln IDs: V-225049
Rule IDs: SV-225049r991589_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-26728r466050_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

NTLM must be prevented from falling back to a Null session.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-SO-000330
Vuln IDs: V-225050
Rule IDs: SV-225050r991589_rule

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

Fix: F-26729r466053_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

PKU2U authentication using online identities must be prevented.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-SO-000340
Vuln IDs: V-225051
Rule IDs: SV-225051r991589_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-26730r466056_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".

b

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

RMF Control: IA-7
Severity: M
CCI: CCI-000803
Version: WN16-SO-000350
Vuln IDs: V-225052
Rule IDs: SV-225052r971535_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-26731r466059_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.

c

Windows Server 2016 must be configured to prevent the storage of the LAN Manager hash of passwords.

RMF Control: IA-5
Severity: H
CCI: CCI-000196
Version: WN16-SO-000360
Vuln IDs: V-225053
Rule IDs: SV-225053r982199_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-26732r466062_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".

c

The LAN Manager authentication level must be set to send NTLMv2 response only and to refuse LM and NTLM.

RMF Control: CM-6
Severity: H
CCI: CCI-000366
Version: WN16-SO-000380
Vuln IDs: V-225054
Rule IDs: SV-225054r991589_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-26733r466065_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 2016 must be configured to at least negotiate signing for LDAP client signing.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-SO-000390
Vuln IDs: V-225055
Rule IDs: SV-225055r991589_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-26734r466068_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

Session security for NTLM SSP-based clients must be configured to require NTLMv2 session security and 128-bit encryption.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-SO-000400
Vuln IDs: V-225056
Rule IDs: SV-225056r991589_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-26735r466071_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

Session security for NTLM SSP-based servers must be configured to require NTLMv2 session security and 128-bit encryption.

RMF Control: CM-6
Severity: M
CCI: CCI-000366
Version: WN16-SO-000410
Vuln IDs: V-225057
Rule IDs: SV-225057r991589_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-26736r466074_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).

b

Users must be required to enter a password to access private keys stored on the computer.

RMF Control: IA-5
Severity: M
CCI: CCI-000186
Version: WN16-SO-000420
Vuln IDs: V-225058
Rule IDs: SV-225058r958450_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-26737r466077_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 2016 must be configured to use FIPS-compliant algorithms for encryption, hashing, and signing.

RMF Control: AC-17
Severity: M
CCI: CCI-000068
Version: WN16-SO-000430
Vuln IDs: V-225059
Rule IDs: SV-225059r958408_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. Satisfies: SRG-OS-000033-GPOS-00014, SRG-OS-000478-GPOS-00223

Fix: F-26738r466080_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".

a

The default permissions of global system objects must be strengthened.

RMF Control: CM-6
Severity: L
CCI: CCI-000366
Version: WN16-SO-000450
Vuln IDs: V-225060
Rule IDs: SV-225060r991589_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-26739r466083_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

User Account Control approval mode for the built-in Administrator must be enabled.

RMF Control: IA-11
Severity: M
CCI: CCI-002038
Version: WN16-SO-000460
Vuln IDs: V-225061
Rule IDs: SV-225061r1001261_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-26740r466086_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

UIAccess applications must not be allowed to prompt for elevation without using the secure desktop.

RMF Control: SC-3
Severity: M
CCI: CCI-001084
Version: WN16-SO-000470
Vuln IDs: V-225062
Rule IDs: SV-225062r958518_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-26741r466089_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

User Account Control must, at a minimum, prompt administrators for consent on the secure desktop.

RMF Control: SC-3
Severity: M
CCI: CCI-001084
Version: WN16-SO-000480
Vuln IDs: V-225063
Rule IDs: SV-225063r958518_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-26742r466092_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

User Account Control must automatically deny standard user requests for elevation.

RMF Control: IA-11
Severity: M
CCI: CCI-002038
Version: WN16-SO-000490
Vuln IDs: V-225064
Rule IDs: SV-225064r1001261_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-26743r466095_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

User Account Control must be configured to detect application installations and prompt for elevation.

RMF Control: SC-3
Severity: M
CCI: CCI-001084
Version: WN16-SO-000500
Vuln IDs: V-225065
Rule IDs: SV-225065r958518_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-26744r466098_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

User Account Control must only elevate UIAccess applications that are installed in secure locations.

RMF Control: SC-3
Severity: M
CCI: CCI-001084
Version: WN16-SO-000510
Vuln IDs: V-225066
Rule IDs: SV-225066r958518_rule

User Account Control (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-26745r466101_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

User Account Control must run all administrators in Admin Approval Mode, enabling UAC.

RMF Control: IA-11
Severity: M
CCI: CCI-002038
Version: WN16-SO-000520
Vuln IDs: V-225067
Rule IDs: SV-225067r1001261_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-26746r466104_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

User Account Control must virtualize file and registry write failures to per-user locations.

RMF Control: SC-3
Severity: M
CCI: CCI-001084
Version: WN16-SO-000530
Vuln IDs: V-225068
Rule IDs: SV-225068r958518_rule

User Account Control (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-26747r466107_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

The Access Credential Manager as a trusted caller user right must not be assigned to any groups or accounts.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000010
Vuln IDs: V-225070
Rule IDs: SV-225070r958726_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-26749r466113_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

The Act as part of the operating system user right must not be assigned to any groups or accounts.

RMF Control: AC-6
Severity: H
CCI: CCI-002235
Version: WN16-UR-000030
Vuln IDs: V-225071
Rule IDs: SV-225071r958726_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-26750r466116_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

The Allow log on locally user right must only be assigned to the Administrators group.

RMF Control: AC-3
Severity: M
CCI: CCI-000213
Version: WN16-UR-000050
Vuln IDs: V-225072
Rule IDs: SV-225072r958472_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-26751r466119_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

The Back up files and directories user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000070
Vuln IDs: V-225073
Rule IDs: SV-225073r958726_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-26752r466122_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

The Create a pagefile user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000080
Vuln IDs: V-225074
Rule IDs: SV-225074r958726_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-26753r466125_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

b

The Create global objects user right must only be assigned to Administrators, Service, Local Service, and Network Service.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000100
Vuln IDs: V-225076
Rule IDs: SV-225076r958726_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-26755r466130_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

The Create permanent shared objects user right must not be assigned to any groups or accounts.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000110
Vuln IDs: V-225077
Rule IDs: SV-225077r958726_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-26756r466133_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

The Create symbolic links user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000120
Vuln IDs: V-225078
Rule IDs: SV-225078r958726_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-26757r466136_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

The Debug programs user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: H
CCI: CCI-002235
Version: WN16-UR-000130
Vuln IDs: V-225079
Rule IDs: SV-225079r958726_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-26758r466139_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

The Force shutdown from a remote system user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000200
Vuln IDs: V-225080
Rule IDs: SV-225080r958726_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-26759r466142_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

The Generate security audits user right must only be assigned to Local Service and Network Service.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000210
Vuln IDs: V-225081
Rule IDs: SV-225081r958726_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-26760r466145_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

The Impersonate a client after authentication user right must only be assigned to Administrators, Service, Local Service, and Network Service.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000220
Vuln IDs: V-225082
Rule IDs: SV-225082r958726_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-26761r466148_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

The Increase scheduling priority user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000230
Vuln IDs: V-225083
Rule IDs: SV-225083r958726_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-26762r466151_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

The Load and unload device drivers user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000240
Vuln IDs: V-225084
Rule IDs: SV-225084r958726_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-26763r466154_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

The Lock pages in memory user right must not be assigned to any groups or accounts.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000250
Vuln IDs: V-225085
Rule IDs: SV-225085r958726_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-26764r466157_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

The Manage auditing and security log user right must only be assigned to the Administrators group.

RMF Control: AU-9
Severity: M
CCI: CCI-000162
Version: WN16-UR-000260
Vuln IDs: V-225086
Rule IDs: SV-225086r958434_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-26765r466160_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

The Modify firmware environment values user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000270
Vuln IDs: V-225087
Rule IDs: SV-225087r958726_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-26766r466163_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

The Perform volume maintenance tasks user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000280
Vuln IDs: V-225088
Rule IDs: SV-225088r958726_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-26767r890516_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

The Profile single process user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000290
Vuln IDs: V-225089
Rule IDs: SV-225089r958726_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-26768r466169_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

c

The Create a token object user right must not be assigned to any groups or accounts.

RMF Control: AC-6
Severity: H
CCI: CCI-002235
Version: WN16-UR-000090
Vuln IDs: V-225091
Rule IDs: SV-225091r958726_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-26771r466176_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

The Restore files and directories user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000300
Vuln IDs: V-225092
Rule IDs: SV-225092r958726_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-26772r466179_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

The Take ownership of files or other objects user right must only be assigned to the Administrators group.

RMF Control: AC-6
Severity: M
CCI: CCI-002235
Version: WN16-UR-000310
Vuln IDs: V-225093
Rule IDs: SV-225093r958726_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-26773r466182_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 2016 must have PowerShell Transcription enabled.

RMF Control: AU-3
Severity: M
CCI: CCI-000134
Version: WN16-CC-000555
Vuln IDs: V-257502
Rule IDs: SV-257502r958420_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-61161r921891_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.