This indicates an attack attempt against a Denial-of-Service vulnerability in MIT Kerberos.
The vulnerability is caused by improper boundary checking in the logging function of the Kerberos Administration Server (kadmind). A remote attacker may be able to exploit this to cause a denial of service condition on the affected system.
MIT Kerberos 5 1.14.x to 1.14.1
MIT Kerberos 5 1.13.4
Denial of Service: Remote attackers can crash vulnerable systems.
Apply the most recent upgrade or patch from the vendor.