The Kerberos service ticket maximum lifetime must be limited to 600 minutes or less.

From Windows Server 2016 Security Technical Implementation Guide

Associated with: CCI-001941 CCI-001942

SV-88013r1_rule The Kerberos service ticket maximum lifetime must be limited to 600 minutes or less.

Vulnerability discussion

This setting determines the maximum amount of time (in minutes) that a granted session ticket can be used to access a particular service. Session tickets are used only to authenticate new connections with servers. Ongoing operations are not interrupted if the session ticket used to authenticate the connection expires during the connection.Satisfies: SRG-OS-000112-GPOS-00057, SRG-OS-000113-GPOS-00058

Check content

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 value for "Maximum lifetime for service ticket" is "0" or greater than "600" minutes, 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 >> "Maximum lifetime for service ticket" to a maximum of "600" minutes, but not "0", which equates to "Ticket doesn't expire".

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