Microsoft Windows 10

Local users on domain-joined computers must not be enumerated

STIG ID: WN10-CC-000130 |   SRG: SRG-OS-000095-GPOS-00049 |   Severity: Medium |   CCI: CCI-000381 |   Vulnerability ID: V-220820

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.

Check

C-22535r857192_chk

This requirement is applicable to domain-joined systems. For standalone or nondomain-joined 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_MACHINERegistry Path: \SOFTWARE\Policies\Microsoft\Windows\System\Value Name: EnumerateLocalUsersValue Type: REG_DWORDValue: 0

Fix

F-22524r857193_fix

This requirement is applicable to domain-joined systems. For standalone or nondomain-joined systems, this is NA.Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Logon >> "Enumerate local users on domain-joined computers" to "Disabled".