Vulnerability Discussion
This setting determines the period of time (in days) during which a user's Ticket Granting Ticket (TGT) may be renewed. This security configuration limits the amount of time an attacker has to crack the TGT and gain access.
Satisfies: SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058
Check
This applies to domain controllers. It is NA for other systems.
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 "Maximum lifetime for user ticket renewal" is greater than "7" days, this is a finding.
Fix
Configure the policy value in the Default Domain Policy for Computer Configuration >> Policies >> Windows Settings >> Security Settings >> Account Policies >> Kerberos Policy >> Maximum lifetime for user ticket renewal to a maximum of "7" days or less.