Microsoft Windows 11

WDigest Authentication must be disabled

STIG ID: WN11-CC-000038 |   SRG: SRG-OS-000095-GPOS-00049 |   Severity: Medium |   CCI: CCI-000381 |   Vulnerability ID: V-253358

Description

When the WDigest Authentication protocol is enabled, plain text passwords are stored in the Local Security Authority Subsystem Service (LSASS) exposing them to theft. WDigest is disabled by default in Windows 11. This setting ensures this is enforced.

Check

C-56811r829156_chk

If the following registry value does not exist or is not configured as specified, this is a finding:Registry Hive: HKEY_LOCAL_MACHINERegistry Path: \SYSTEM\CurrentControlSet\Control\SecurityProviders\Wdigest\Value Name: UseLogonCredentialType: REG_DWORDValue: 0x00000000 (0)

Fix

F-56761r829157_fix

Configure the policy value for Computer Configuration >> Administrative Templates >> MS Security Guide >> "WDigest Authentication (disabling may require KB2871997)" to "Disabled".The patch referenced in the policy title is not required for Windows 11.This policy setting requires the installation of the SecGuide custom templates included with the STIG package. "SecGuide.admx" and "SecGuide.adml" must be copied to the \Windows\PolicyDefinitions and \Windows\PolicyDefinitions\en-US directories respectively.