Ubuntu Security Notice 439-2 – USN-439-1 fixed a vulnerability in file. The original fix did not fully solve the problem. This update provides a more complete solution.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/57145/USN-439-2.txt
Source: https://packetstormsecurity.com/files/57145/Ubuntu-Security-Notice-439-2.html