==========================================================================
Ubuntu Security Notice USN-4684-1
January 07, 2021
edk2 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 20.10
– Ubuntu 20.04 LTS
– Ubuntu 18.04 LTS
– Ubuntu 16.04 LTS
Summary:
Several security issues were fixed in EDK II.
Software Description:
– 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:
ovmf 2020.05-5ubuntu0.1
qemu-efi 2020.05-5ubuntu0.1
qemu-efi-aarch64 2020.05-5ubuntu0.1
qemu-efi-arm 2020.05-5ubuntu0.1
Ubuntu 20.04 LTS:
ovmf 0~20191122.bd85bf54-2ubuntu3.1
qemu-efi 0~20191122.bd85bf54-2ubuntu3.1
qemu-efi-aarch64 0~20191122.bd85bf54-2ubuntu3.1
qemu-efi-arm 0~20191122.bd85bf54-2ubuntu3.1
Ubuntu 18.04 LTS:
ovmf 0~20180205.c0d9813c-2ubuntu0.3
qemu-efi 0~20180205.c0d9813c-2ubuntu0.3
qemu-efi-aarch64 0~20180205.c0d9813c-2ubuntu0.3
qemu-efi-arm 0~20180205.c0d9813c-2ubuntu0.3
Ubuntu 16.04 LTS:
ovmf 0~20160408.ffea0a2c-2ubuntu0.2
qemu-efi 0~20160408.ffea0a2c-2ubuntu0.2
After a standard system update you need to restart the virtual machines
that use the affected firmware to make all the necessary changes.
References:
https://usn.ubuntu.com/4684-1
CVE-2019-14562, CVE-2019-14584
Package Information:
https://launchpad.net/ubuntu/+source/edk2/2020.05-5ubuntu0.1
https://launchpad.net/ubuntu/+source/edk2/0~20191122.bd85bf54-2ubuntu3.1
https://launchpad.net/ubuntu/+source/edk2/0~20180205.c0d9813c-2ubuntu0.3
https://launchpad.net/ubuntu/+source/edk2/0~20160408.ffea0a2c-2ubuntu0.2
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