Secunia Security Advisory – Ubuntu has issued an update for gnutls12, gnutls13, and gnutls26. This fixes a vulnerability, which can be exploited by malicious people to bypass certain security restrictions.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/72319/sa32879.txt
Source: https://packetstormsecurity.com/files/72319/Secunia-Security-Advisory-32879.html