==========================================================================
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

—–BEGIN PGP SIGNATURE—–
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=ad0K
—–END PGP SIGNATURE—–
—