Changes are coming to https://stigviewer.com.
Take our survey to help us understand your usage and how we can better serve you in the future.
Take Survey
Windows Server 2022 must prevent NTLM from falling back to a Null session.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-254471 | WN22-SO-000270 | SV-254471r991589_rule | Medium |
| Description |
|---|
| NTLM sessions that are allowed to fall back to Null (unauthenticated) sessions may gain unauthorized access. |
| STIG | Date |
|---|---|
| Microsoft Windows Server 2022 Security Technical Implementation Guide | 2024-06-14 |
Details
| Check Text ( C-57956r849227_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: \SYSTEM\CurrentControlSet\Control\LSA\MSV1_0\ Value Name: allownullsessionfallback Type: REG_DWORD Value: 0x00000000 (0) |
| Fix Text (F-57907r849228_fix) |
|---|
| Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> Network security: Allow LocalSystem NULL session fallback to "Disabled". |