Detections
Analytics

WN19-SO-000270 - Windows Server 2019 must prevent NTLM from falling back to a Null session.

Information

NTLM sessions that are allowed to fall back to Null (unauthenticated) sessions may gain unauthorized access.

Solution

Configure the policy value for Computer Configuration >> Windows Settings >> Security Settings >> Local Policies >> Security Options >> 'Network security: Allow LocalSystem NULL session fallback' to 'Disabled'.

See Also

https://dl.dod.cyber.mil/wp-content/uploads/stigs/zip/U_MS_Windows_Server_2019_V3R9_STIG.zip

Item Details

Category: CONFIGURATION MANAGEMENT

References: 800-53|CM-6b., CAT|II, CCI|CCI-000366, Rule-ID|SV-205917r991589_rule, STIG-ID|WN19-SO-000270, STIG-Legacy|SV-103385, STIG-Legacy|V-93297, Vuln-ID|V-205917

Plugin: Windows

Control ID: ca2a78f2b313f5b9880b78ba6f9db334e08c20c7a20909645a105aeec5cbb31d