Windows Server 2019 must restrict remote calls to the Security Account Manager (SAM) to Administrators on domain-joined member servers and standalone or nondomain-joined systems.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-205747 | WN19-MS-000060 | SV-205747r958726_rule | Medium |
| Description |
| The Windows SAM stores users' passwords. Restricting Remote Procedure Call (RPC) connections to the SAM to Administrators helps protect those credentials. |
| STIG | Date |
| Microsoft Windows Server 2019 Security Technical Implementation Guide | 2025-01-15 |
Details
| Check Text (C-6012r857327_chk) |
| This applies to member servers and standalone or nondomain-joined systems. It is NA for domain controllers. If the following registry value does not exist or is not configured as specified, this is a finding: Registry Hive: HKEY_LOCAL_MACHINE Registry Path: \SYSTEM\CurrentControlSet\Control\Lsa\ Value Name: RestrictRemoteSAM Value Type: REG_SZ Value: O:BAG:BAD:(A;;RC;;;BA) |
| Fix Text (F-6012r857328_fix) |
| Navigate to the policy Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> "Network access: Restrict clients allowed to make remote calls to SAM". Select "Edit Security" to configure the "Security descriptor:". Add "Administrators" in "Group or user names:" if it is not already listed (this is the default). Select "Administrators" in "Group or user names:". Select "Allow" for "Remote Access" in "Permissions for "Administrators". Click "OK". The "Security descriptor:" must be populated with "O:BAG:BAD:(A;;RC;;;BA) for the policy to be enforced. |