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


Overview

Finding ID Version Rule ID IA Controls Severity
V-73533 WN16-MS-000030 SV-88187r1_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
Windows Server 2016 Security Technical Implementation Guide 2020-06-16

Details

Check Text ( C-73607r1_chk )
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 (F-79975r1_fix)
Configure the policy value for Computer Configuration >> Administrative Templates >> System >> Logon >> "Enumerate local users on domain-joined computers" to "Disabled".