Ubuntu Security Notice 437-1 – Sean Larsson of iDefense Labs discovered that libwpd was vulnerable to integer overflows. If a user were tricked into opening a specially crafted WordPerfect document with an application that used libwpd, an attacker could execute arbitrary code with user privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/55254/USN-437-1.txt
Source: https://packetstormsecurity.com/files/55254/Ubuntu-Security-Notice-437-1.html