Secunia Security Advisory – Ubuntu has issued an update for tuxpaint. This fixes a vulnerability, which can be exploited by malicious, local users to perform certain actions on a vulnerable system with escalated privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/43135/sa18474.txt
Source: https://packetstormsecurity.com/files/43135/Secunia-Security-Advisory-18474.html