USN-4684-1: EDK II vulnerabilities

07 January 2021

Several security issues were fixed in EDK II.

Releases

Packages

  • edk2 - UEFI firmware for virtual machines

Details

Laszlo Ersek discovered that EDK II incorrectly validated certain signed
images. An attacker could possibly use this issue with a specially crafted
image to cause EDK II to hang, resulting in a denial of service. This issue
only affected Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.
(CVE-2019-14562)

It was discovered that EDK II incorrectly parsed signed PKCS #7 data. An
attacker could use this issue to cause EDK II to crash, resulting in a
denial of service, or possibly execute arbitrary code. (CVE-2019-14584)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 20.10
Ubuntu 20.04
Ubuntu 18.04
Ubuntu 16.04

After a standard system update you need to restart the virtual machines
that use the affected firmware to make all the necessary changes.