Debian Security Advisory 1490-1 – It was discovered that a buffer overflow in the GIF image parsing code of Tk, a cross-platform graphical toolkit, could lead to denial of service and potentially the execution of arbitrary code.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/63448/dsa-1490-1.txt
Source: https://packetstormsecurity.com/files/63448/Debian-Linux-Security-Advisory-1490-1.html