STIG ID: WN22-MS-000060 | SRG: SRG-OS-000324-GPOS-00125 | Severity: medium | CCI: | Vulnerability Id: V-254433
The Windows SAM stores users' passwords. Restricting Remote Procedure Call (RPC) connections to the SAM to Administrators helps protect those credentials.
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.
This applies to member servers and standalone or nondomain-joined systems; it is NA for domain controllers.
If the following registry value does not exist or is not configured as specified, this is a finding:
Registry Hive: HKEY_LOCAL_MACHINE
Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\
Value Name: RestrictRemoteSAM
Value Type: REG_SZ
Value: O:BAG:BAD:(A;;RC;;;BA)