Secunia Security Advisory – Ubuntu has issued an update for gnutls. This fixes some vulnerabilities, which can be exploited by malicious people to cause a DoS (Denial of Service) or to potentially compromise an application using the library.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/66668/sa30331.txt
Source: https://packetstormsecurity.com/files/66668/Secunia-Security-Advisory-30331.html