Anonymous enumeration of SAM accounts must not be allowed.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-220929 | WN10-SO-000145 | SV-220929r991589_rule | CCI-000366 | high |
| Description | ||||
| Anonymous enumeration of SAM accounts allows anonymous log on users (null session connections) to list all accounts names, thus providing a list of potential points to attack the system. | ||||
| STIG | Date | |||
| Microsoft Windows 10 Security Technical Implementation Guide | 2025-02-25 | |||
Details
Check Text (C-220929r991589_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: 1
Fix Text (F-22633r555273_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".