Ubuntu Security Notice 879-1 – Jeff Blaine, Radoslav Bodo, Jakob Haufe, and Jorgen Wahlsten discovered that the Kerberos Key Distribution Center service did not correctly verify certain network traffic. An unauthenticated remote attacker could send a specially crafted request that would cause the KDC to crash, leading to a denial of service.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/84853/USN-879-1.txt
Source: https://packetstormsecurity.com/files/84853/Ubuntu-Security-Notice-879-1.html