Ubuntu Security Notice 515-1 – It was discovered that t1lib does not properly perform bounds checking which can result in a buffer overflow vulnerability. An attacker could send specially crafted input to applications linked against t1lib which could result in a DoS or arbitrary code execution.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/59462/USN-515-1.txt
Source: https://packetstormsecurity.com/files/59462/Ubuntu-Security-Notice-515-1.html