Microsoft Windows Server 2019

Windows Server 2019 administrator accounts must not be enumerated during elevation

STIG ID: WN19-CC-000240 | SRG: SRG-OS-000134-GPOS-00068 | Severity: Medium | CCI: CCI-001084 | Vulnerability ID: V-205714

Description

Enumeration of administrator accounts when elevating can provide part of the logon information to an unauthorized user. This setting configures the system to always require users to type in a username and password to elevate a running application.

Check

C-5979r355060_chk

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\Microsoft\Windows\CurrentVersion\Policies\CredUI\

Value Name: EnumerateAdministrators

Type: REG_DWORD
Value: 0x00000000 (0)

Fix

F-5979r355061_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> Windows Components >> Credential User Interface >> "Enumerate administrator accounts on elevation" to "Disabled".