1.213 WN10-SO-000180

Information

NTLM must be prevented from falling back to a Null session.

GROUP ID: V-220934RULE ID: SV-220934r991589

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://workbench.cisecurity.org/benchmarks/23869