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NTLM must be prevented from falling back to a Null session.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-21952 | 3.152 | SV-25275r2_rule | Medium |
| Description |
|---|
| NTLM sessions that are allowed to fall back to Null (unauthenticated) sessions may gain unauthorized access. |
| STIG | Date |
|---|---|
| Windows 7 Security Technical Implementation Guide | 2017-07-28 |
Details
| Check Text ( None ) |
|---|
| None |
| Fix Text (F-65543r2_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". |