Ubuntu Security Notice USN-760-1 – It was discovered that CUPS did not properly check the height of TIFF images. If a user or automated system were tricked into opening a crafted TIFF image file, a remote attacker could cause a denial of service or possibly execute arbitrary code with user privileges. In Ubuntu 7.10, 8.04 LTS, and 8.10, attackers would be isolated by the AppArmor CUPS profile.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/76752/USN-760-1.txt
Source: https://packetstormsecurity.com/files/76752/Ubuntu-Security-Notice-760-1.html