Title

Kerberos user logon restrictions must be enforced. (Cat II impact)

Discussion

This policy setting determines whether the Kerberos Key Distribution Center (KDC) validates every request for a session ticket against the user rights policy of the target computer. The policy is enabled by default which is the most secure setting for validating access to target resources is not circumvented.

Check Content

Verify the following is configured in the Default Domain Policy. Open "Group Policy Management". Navigate to "Group Policy Objects" in the Domain being reviewed (Forest >> Domains >> Domain). Right click on the "Default Domain Policy", select "Edit". Navigate to Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy. If the policy "Enforce user logon restrictions" is not set to "Enabled", this is a finding.

Fix Text

Configure the policy value in the Default Domain Policy for Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy >> "Enforce user logon restrictions" to "Enabled".

Additional Identifiers

Rule ID: SV-28494r2_rule

Vulnerability ID: V-2376

Group Title: Kerberos-User Logon Restrictions

Expert Comments

CCIs tied to check.

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