Debian Security Advisory 1357-1 – It was discovered that an integer overflow in the xpdf PDF viewer may lead to the execution of arbitrary code if a malformed PDF file is opened. koffice includes a copy of the xpdf code and required an update as well.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/58700/dsa-1357-1.txt
Source: https://packetstormsecurity.com/files/58700/Debian-Linux-Security-Advisory-1357-1.html