Title

The Kerberos policy option Maximum lifetime for user ticket renewal must be configured for a maximum of 7 days or less. (Cat II impact)

Discussion

This setting determines the period of time (in days) during which a users TGT may be renewed. This security configuration limits the amount of time an attacker has to crack the TGT and gain access.

Check Content

1. Analyze the system using the Security Configuration and Analysis. 2. Expand the Security Configuration and Analysis tree view. 3. Navigate to Account Policies -> Kerberos Policy. 4. If the “Maximum lifetime for user ticket renewal” is greater than ‘7’ days, then this is a finding.

Fix Text

Configure the Kerberos policy option "Maximum lifetime for user ticket renewal" to a maximum of 7 days or less.

Additional Identifiers

Rule ID: SV-28500r1_rule

Vulnerability ID: V-2379

Group Title:

Expert Comments

CCIs tied to check.

Controls tied to check. These are derived from the CCIs shown above.