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-205747r1106518_rule | CCI-002235 | 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 | 2025-05-23 | |||
Details
Check Text (C-205747r1106518_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-6012r1106517_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. If an application requires this user right, this is not a finding. Vendor documentation must support the requirement for having the user right. The requirement must be documented and approved by the information system security officer (ISSO).