Secunia Security Advisory – Ubuntu has issued an update for krb5. This fixes multiple vulnerabilities, which can be exploited by malicious users to cause a DoS (Denial of Service) and by malicious people to disclose potentially sensitive information or cause a DoS (Denial of Service).
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/88558/sa39290.txt
Source: https://packetstormsecurity.com/files/88558/Secunia-Security-Advisory-39290.html