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Ubuntu 20.04 LTS USN-5677-1 Critical: Kernel Patch Denial Of Service

ubuntu
Calendar Grey October 13, 2022
Dist Ubuntu Esm H88
Enhance your Ubuntu's stability by updating to fix kernel vulnerabilities. Follow these detailed steps to ensure a secure and efficient system
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-oracle-5.4: Linux kernel for Oracle Cloud systems

- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

It was discovered that the BPF verifier in the Linux kernel did not

properly handle internal data structures. A local attacker could use this

to expose sensitive information (kernel memory). (CVE-2021-4159)

It was discovered that an out-of-bounds write vulnerability existed in the

Video for Linux 2 (V4L2) implementation in the Linux kernel. A local

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

possibly execute arbitrary code. (CVE-2022-20369)

Duoming Zhou discovered that race conditions existed in the timer handling

implementation of the Linux kernel's Rose X.25 protocol layer, resulting in

use-after-free vulnerabil...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical kernel patch Ubuntu system crash sensitive information

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1071-raspi    5.4.0-1071.81
   linux-image-5.4.0-1090-gcp      5.4.0-1090.98
   linux-image-gcp-lts-20.04       5.4.0.1090.95
   linux-image-raspi               5.4.0.1071.104
   linux-image-raspi2              5.4.0.1071.104

Ubuntu 18.04 LTS:
   linux-image-5.4.0-1071-raspi    5.4.0-1071.81~18.04.1
   linux-image-5.4.0-1084-oracle   5.4.0-1084.92~18.04.1
   linux-image-oracle              5.4.0.1084.92~18.04.61
   linux-image-raspi-hwe-18.04     5.4.0.1071.71

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-5677-1

CVE-2021-4159, CVE-2022-20369, CVE-2022-2318, CVE-2022-26365,

CVE-2022-26373, CVE-2022-3176, CVE-2022-33740, CVE-2022-33741,

CVE-2022-33742, CVE-2022-33744, CVE-2022-36879

Severity
critical
Lowest
Low
Medium
High
Critical

October 13, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical kernel patch Ubuntu system crash sensitive information

Package Information

https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1090.98
https://launchpad.net/ubuntu/+source/linux-oracle-5.4/5.4.0-1084.92~18.04.1
https://launchpad.net/ubuntu/+source/linux-raspi-5.4/5.4.0-1071.81~18.04.1

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