Ubuntu Security Notice USN-832-1 – It was discovered that FreeRADIUS did not correctly handle certain malformed attributes. A remote attacker could exploit this flaw and cause the FreeRADIUS server to crash, resulting in a denial of service.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/81387/USN-832-1.txt
Source: https://packetstormsecurity.com/files/81387/Ubuntu-Security-Notice-832-1.html