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Local users on domain-joined computers must not be enumerated.


Overview

Finding ID Version Rule ID IA Controls Severity
V-220820 WN10-CC-000130 SV-220820r569187_rule Medium
Description
The username is one part of logon credentials that could be used to gain access to a system. Preventing the enumeration of users limits this information to authorized personnel.
STIG Date
Microsoft Windows 10 Security Technical Implementation Guide 2022-04-08

Details

Check Text ( C-22535r554945_chk )
This requirement is applicable to domain-joined systems, for standalone systems this is NA.

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: \SOFTWARE\Policies\Microsoft\Windows\System\

Value Name: EnumerateLocalUsers

Value Type: REG_DWORD
Value: 0
Fix Text (F-22524r554946_fix)
This requirement is applicable to domain-joined systems, for standalone systems this is NA.

Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Logon >> "Enumerate local users on domain-joined computers" to "Disabled".