Windows Server 2019 must not allow anonymous enumeration of Security Account Manager (SAM) accounts.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-205914 | WN19-SO-000220 | SV-205914r991589_rule | High |
| Description |
| 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. |
| STIG | Date |
| Microsoft Windows Server 2019 Security Technical Implementation Guide | 2025-01-15 |
Details
| Check Text (C-6179r356104_chk) |
| 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: RestrictAnonymousSAM Value Type: REG_DWORD Value: 0x00000001 (1) |
| Fix Text (F-6179r356105_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". |