USN-4572-2: Spice vulnerability

USN-4572-2: Spice vulnerability

USN-4572-1 fixed a vulnerability in Spice. This update provides
the corresponding update for Ubuntu 14.04 ESM.

Original advisory details:

Frediano Ziglio discovered that Spice incorrectly handled QUIC image
decoding. A remote attacker could use this to cause Spice to crash,
resulting in a denial of service, or possibly execute arbitrary code.
Source: USN-4572-2: Spice vulnerability