Ubuntu Security Notice 463-1 – Tomas Golembiovsky discovered that some vim commands were accidentally allowed in modelines. By tricking a user into opening a specially crafted file in vim, an attacker could execute arbitrary code with user privileges.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/56923/USN-463-1.txt
Source: https://packetstormsecurity.com/files/56923/Ubuntu-Security-Notice-463-1.html