==========================================================================
Ubuntu Security Notice USN-4689-3
January 20, 2021

nvidia-graphics-drivers-418-server, nvidia-graphics-drivers-450-server
vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Several security issues were fixed in NVIDIA graphics drivers.

Software Description:
- nvidia-graphics-drivers-418-server: NVIDIA Server Driver
- nvidia-graphics-drivers-450-server: NVIDIA Server Driver

Details:

It was discovered that the NVIDIA GPU display driver for the Linux kernel
contained a vulnerability that allowed user-mode clients to access legacy
privileged APIs. A local attacker could use this to cause a denial of
service or escalate privileges. (CVE-2021-1052)

It was discovered that the NVIDIA GPU display driver for the Linux kernel
did not properly validate a pointer received from userspace in some
situations. A local attacker could use this to cause a denial of service.
(CVE-2021-1053)

Xinyuan Lyu discovered that the NVIDIA GPU display driver for the Linux
kernel did not properly restrict device-level GPU isolation. A local
attacker could use this to cause a denial of service or possibly expose
sensitive information. (CVE-2021-1056)

Update instructions:

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

Ubuntu 20.10:
  nvidia-dkms-418-server          418.181.07-0ubuntu0.20.10.1
  nvidia-dkms-440-server          450.102.04-0ubuntu0.20.10.1
  nvidia-dkms-450-server          450.102.04-0ubuntu0.20.10.1
  nvidia-kernel-common-418-server  418.181.07-0ubuntu0.20.10.1
  nvidia-kernel-common-440-server  450.102.04-0ubuntu0.20.10.1
  nvidia-kernel-common-450-server  450.102.04-0ubuntu0.20.10.1
  nvidia-kernel-source-418-server  418.181.07-0ubuntu0.20.10.1
  nvidia-kernel-source-440-server  450.102.04-0ubuntu0.20.10.1
  nvidia-kernel-source-450-server  450.102.04-0ubuntu0.20.10.1
  nvidia-utils-418-server         418.181.07-0ubuntu0.20.10.1
  nvidia-utils-440-server         450.102.04-0ubuntu0.20.10.1
  nvidia-utils-450-server         450.102.04-0ubuntu0.20.10.1
  xserver-xorg-video-nvidia-418-server  418.181.07-0ubuntu0.20.10.1
  xserver-xorg-video-nvidia-440-server  450.102.04-0ubuntu0.20.10.1
  xserver-xorg-video-nvidia-450-server  450.102.04-0ubuntu0.20.10.1

Ubuntu 20.04 LTS:
  nvidia-dkms-418-server          418.181.07-0ubuntu0.20.04.1
  nvidia-dkms-440-server          450.102.04-0ubuntu0.20.04.1
  nvidia-dkms-450-server          450.102.04-0ubuntu0.20.04.1
  nvidia-kernel-common-418-server  418.181.07-0ubuntu0.20.04.1
  nvidia-kernel-common-440-server  450.102.04-0ubuntu0.20.04.1
  nvidia-kernel-common-450-server  450.102.04-0ubuntu0.20.04.1
  nvidia-kernel-source-418-server  418.181.07-0ubuntu0.20.04.1
  nvidia-kernel-source-440-server  450.102.04-0ubuntu0.20.04.1
  nvidia-kernel-source-450-server  450.102.04-0ubuntu0.20.04.1
  nvidia-utils-418-server         418.181.07-0ubuntu0.20.04.1
  nvidia-utils-440-server         450.102.04-0ubuntu0.20.04.1
  nvidia-utils-450-server         450.102.04-0ubuntu0.20.04.1
  xserver-xorg-video-nvidia-418-server  418.181.07-0ubuntu0.20.04.1
  xserver-xorg-video-nvidia-440-server  450.102.04-0ubuntu0.20.04.1
  xserver-xorg-video-nvidia-450-server  450.102.04-0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
  nvidia-dkms-418-server          418.181.07-0ubuntu0.18.04.1
  nvidia-dkms-440-server          450.102.04-0ubuntu0.18.04.1
  nvidia-dkms-450-server          450.102.04-0ubuntu0.18.04.1
  nvidia-kernel-common-418-server  418.181.07-0ubuntu0.18.04.1
  nvidia-kernel-common-440-server  450.102.04-0ubuntu0.18.04.1
  nvidia-kernel-common-450-server  450.102.04-0ubuntu0.18.04.1
  nvidia-kernel-source-418-server  418.181.07-0ubuntu0.18.04.1
  nvidia-kernel-source-440-server  450.102.04-0ubuntu0.18.04.1
  nvidia-kernel-source-450-server  450.102.04-0ubuntu0.18.04.1
  nvidia-utils-418-server         418.181.07-0ubuntu0.18.04.1
  nvidia-utils-440-server         450.102.04-0ubuntu0.18.04.1
  nvidia-utils-450-server         450.102.04-0ubuntu0.18.04.1
  xserver-xorg-video-nvidia-418-server  418.181.07-0ubuntu0.18.04.1
  xserver-xorg-video-nvidia-440-server  450.102.04-0ubuntu0.18.04.1
  xserver-xorg-video-nvidia-450-server  450.102.04-0ubuntu0.18.04.1

This update uses a new upstream release, which includes additional
bug fixes. After a standard system update you need to reboot your
computer to make all the necessary changes.

References:
  https://usn.ubuntu.com/4689-3
  https://usn.ubuntu.com/4689-1
  CVE-2021-1052, CVE-2021-1053

Package Information:

https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-418-server/418.181.07-0ubuntu0.20.10.1

https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-450-server/450.102.04-0ubuntu0.20.10.1

https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-418-server/418.181.07-0ubuntu0.20.04.1

https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-450-server/450.102.04-0ubuntu0.20.04.1

https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-418-server/418.181.07-0ubuntu0.18.04.1

https://launchpad.net/ubuntu/+source/nvidia-graphics-drivers-450-server/450.102.04-0ubuntu0.18.04.1