USN-4668-4: python-apt vulnerability

USN-4668-4: python-apt vulnerability

USN-4668-1 fixed a vulnerability in python-apt. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

Kevin Backhouse discovered that python-apt incorrectly handled resources. A
local attacker could possibly use this issue to cause python-apt to consume
resources, leading to a denial of service.
Source: USN-4668-4: python-apt vulnerability