Ubuntu Security Notice 521-1 – Luigi Auriemma discovered that libmodplug did not properly sanitize its input. A specially crafted AMF file could be used to exploit this situation to cause buffer overflows and possibly execute arbitrary code as the user.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/59676/USN-521-1.txt
Source: https://packetstormsecurity.com/files/59676/Ubuntu-Security-Notice-521-1.html