Mandriva Linux Security Advisory – A vulnerablity in Tk was found that could be used to overrun a buffer when loading certain GIF images. If a user were tricked into opening a specially crafted GIF file, it could lead to a denial of service condition or possibly the execution of arbitrary code with the user’s privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/60209/MDKSA-2007-200.txt
Source: https://packetstormsecurity.com/files/60209/Mandriva-Linux-Security-Advisory-2007.200.html