Ubuntu Security Notice 561-1 – Jose Miguel Esparza discovered that pwlib did not correctly handle large string lengths. A remote attacker could send specially crafted packets to applications linked against pwlib (e.g. Ekiga) causing them to crash, leading to a denial of service.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/62436/USN-561-1.txt
Source: https://packetstormsecurity.com/files/62436/Ubuntu-Security-Notice-561-1.html