Debian Security Advisory 1716-1 – It was discovered that xvnc4viewer, a virtual network computing client software for X, is prone to an integer overflow via a malicious encoding value that could lead to arbitrary code execution.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/74531/dsa-1716-1.txt
Source: https://packetstormsecurity.com/files/74531/Debian-Linux-Security-Advisory-1716-1.html