WN25-MS-000060 Windows Server 2025 must restrict remote calls to the Security Account Manager (SAM) to Administrators on domain-joined member servers and stand-alone or nondomain-joined systems.
All changes in this version
Maps to AC-6(10) via CCI-002235
Title
Windows Server 2025 must restrict remote calls to the Security Account Manager (SAM) to Administrators on domain-joined member servers and stand-alone or nondomain-joined systems.
Control
This applies to member servers and stand-alone or nondomain-joined systems; it is not applicable for domain controllers. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\ Value Name: RestrictRemoteSAM Value Type: REG_SZ Value: O:BAG:BAD:(A;;RC;;;BA)
Discussion
The Windows SAM stores users' passwords. Restricting Remote Procedure Call (RPC) connections to the SAM to Administrators helps protect those credentials.
Related controls
CCI-002235
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.