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

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-2377	AD.4030_2008	SV-28497r2_rule		Medium

Description
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.

STIG	Date
Windows 2008 Domain Controller Security Technical Implementation Guide	2018-03-07

Details

Check Text ( C-71091r1_chk )
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.

Check Text ( C-71091r1_chk )

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 (F-76935r1_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 service ticket" to a maximum of "600" minutes, but not "0" which equates to "Ticket doesn't expire".