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V-73533

CAT II (Medium)

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

Rule ID

SV-88187r1_rule

STIG

Windows Server 2016 Security Technical Implementation Guide

Version

V1R10

CCIs

CCI-000381

Discussion

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 Content

This applies to member servers. For domain controllers and 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

Type: REG_DWORD
Value: 0x00000000 (0)

Fix Text

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