Secunia Security Advisory – Debian has issued an update for vnc4. This fixes a vulnerability, which can be exploited by malicious people to potentially compromise a user’s system.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/74568/sa33745.txt
Source: https://packetstormsecurity.com/files/74568/Secunia-Security-Advisory-33745.html