USN-4156-1 fixed several vulnerabilities in SDL. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.
Original advisory details:
It was discovered that SDL incorrectly handled certain images. If a user
were tricked into opening a crafted image file, a remote attacker could
use this issue to cause SDL to crash, resulting in a denial of service, or
possibly execute arbitary code.
The problem can be corrected by updating your system to the following