Finding ID | Version | Rule ID | IA Controls | Severity |
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V-21952 | WN12-SO-000062 | SV-53177r1_rule | Medium |
Description |
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NTLM sessions that are allowed to fall back to Null (unauthenticated) sessions may gain unauthorized access. |
STIG | Date |
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Windows Server 2012/2012 R2 Member Server Security Technical Implementation Guide | 2019-03-13 |
Check Text ( C-47483r1_chk ) |
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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: 0 |
Fix Text (F-46103r1_fix) |
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Configure the policy value for Computer Configuration -> Windows Settings -> Security Settings -> Local Policies -> Security Options -> "Network security: Allow LocalSystem NULL session fallback" to "Disabled". |