V-205696 | Windows Server 2019 local users on domain-...

Microsoft Windows Server 2019

Windows Server 2019 local users on domain-joined member servers must not be enumerated

STIG ID: WN19-MS-000030 | SRG: SRG-OS-000095-GPOS-00049 | Severity: Medium | CCI: CCI-000381 | Vulnerability ID: V-205696

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-5961r857321_chk

This applies to member servers. For domain controllers and 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: EnumerateLocalUsersType: REG_DWORDValue: 0x00000000 (0)

Fix

F-5961r355007_fix

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