Ubuntu Security Notice USN-4572-2
October 07, 2020
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 14.04 ESM
Spice could be made to crash or run programs if it received specially
crafted network traffic.
– spice: SPICE protocol client and server library
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.
The problem can be corrected by updating your system to the following
Ubuntu 14.04 ESM:
After a standard system update you need to restart qemu guests to make all
the necessary changes.