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Ubuntu 20.04 LTS USN-5266-1 Critical: GKE Kernel Denial Of Service

ubuntu
Calendar Grey February 3, 2022
Dist Ubuntu Esm H88
Important Ubuntu update issued for linux-gke kernel flaw fixes mitigating potential denial of service threats. Ensure your systems are updated immediately!
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gke: Linux kernel for Google Container Engine (GKE) systems

- linux-gke-5.4: Linux kernel for Google Container Engine (GKE) systems

Details:

It was discovered that the Packet network protocol implementation in the

Linux kernel contained a double-free vulnerability. A local attacker could

use this to cause a denial of service (system crash) or possibly execute

arbitrary code. (CVE-2021-22600)

Luo Likang discovered that the FireDTV Firewire driver in the Linux kernel

did not properly perform bounds checking in some situations. A local

attacker could use this to cause a denial of service (system crash) or

possibly execute arbitrary code. (CVE-2021-42739)

Topics%20covered

Topics Covered

security advisory denial of service critical system update ubuntu linux kernel

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.4.0-1061-gke      5.4.0-1061.64
  linux-image-gke                 5.4.0.1061.71
  linux-image-gke-5.4             5.4.0.1061.71

Ubuntu 18.04 LTS:
  linux-image-5.4.0-1061-gke      5.4.0-1061.64~18.04.1
  linux-image-gke-5.4             5.4.0.1061.64~18.04.25

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed.
Unless you manually uninstalled the standard kernel metapackages
(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
linux-powerpc), a standard system upgrade will automatically perform
this as well.

References

https://ubuntu.com/security/notices/USN-5266-1

CVE-2021-22600, CVE-2021-42739

Severity
critical
Lowest
Low
Medium
High
Critical

February 03, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical system update ubuntu linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-gke/5.4.0-1061.64
https://launchpad.net/ubuntu/+source/linux-gke-5.4/5.4.0-1061.64~18.04.1

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