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The Kerberos service ticket maximum lifetime must meet minimum standards.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
|---|---|---|---|---|
| V-2377 | AD.4030_2008 | SV-28497r1_rule | ECSC-1 | 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 | 2013-10-01 |
Details
| Check Text ( C-39117r1_chk ) |
|---|
| Analyze the system using the Security Configuration and Analysis snap-in. Expand the Security Configuration and Analysis tree view. Navigate to 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-34267r1_fix) |
|---|
| Configure the Kerberos policy option “Maximum lifetime for service ticket” to a maximum of 600 minutes, but not 0 which equates to “Ticket doesn’t expire”. |