Ubuntu 18.04 LTS USN-5339-1 Critical: Kernel Access Issues

ubuntu

March 22, 2022

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems

- linux-dell300x: Linux kernel for Dell 300x platforms

- linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-snapdragon: Linux kernel for Qualcomm Snapdragon processors- linux-aws-hwe: Linux kernel for Amazon Web Services (AWS-HWE) systems

- linux-hwe: Linux hardware enablement (HWE) kernel

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

Details:

Yiqi Sun and Kevin Wang discovered that the cgroups implementation in the

Linux kernel did not properly restrict access to the cgroups v1

release_agent feature. A local attacker could use this to gain

administrative privileges. (CVE-2022-0492)

It was discovered that an ...

Read the Full Advisory

Topics Covered

security advisory denial of service access control system update ubuntu linux kernel administrative privilege

Update Instructions

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

Ubuntu 18.04 LTS:
  linux-image-4.15.0-1038-dell300x  4.15.0-1038.43
  linux-image-4.15.0-1090-oracle  4.15.0-1090.99
  linux-image-4.15.0-1110-kvm     4.15.0-1110.113
  linux-image-4.15.0-1119-gcp     4.15.0-1119.133
  linux-image-4.15.0-1123-snapdragon  4.15.0-1123.132
  linux-image-4.15.0-1124-aws     4.15.0-1124.133
  linux-image-4.15.0-1134-azure   4.15.0-1134.147
  linux-image-4.15.0-173-generic  4.15.0-173.182
  linux-image-4.15.0-173-generic-lpae  4.15.0-173.182
  linux-image-4.15.0-173-lowlatency  4.15.0-173.182
  linux-image-aws-lts-18.04       4.15.0.1124.127
  linux-image-azure-lts-18.04     4.15.0.1134.107
  linux-image-dell300x            4.15.0.1038.40
  linux-image-gcp-lts-18.04       4.15.0.1119.138
  linux-image-generic             4.15.0.173.162
  linux-image-generic-lpae        4.15.0.173.162
  linux-image-kvm                 4.15.0.1110.106
  linux-image-lowlatency          4.15.0.173.162
  linux-image-oracle-lts-18.04    4.15.0.1090.100
  linux-image-snapdragon          4.15.0.1123.126
  linux-image-virtual             4.15.0.173.162

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1090-oracle  4.15.0-1090.99~16.04.1
  linux-image-4.15.0-1124-aws-hwe  4.15.0-1124.133~16.04.1
  linux-image-4.15.0-173-generic  4.15.0-173.182~16.04.1
  linux-image-4.15.0-173-lowlatency  4.15.0-173.182~16.04.1
  linux-image-aws-hwe             4.15.0.1124.114
  linux-image-generic-hwe-16.04   4.15.0.173.165
  linux-image-lowlatency-hwe-16.04  4.15.0.173.165
  linux-image-oem                 4.15.0.173.165
  linux-image-oracle              4.15.0.1090.78
  linux-image-virtual-hwe-16.04   4.15.0.173.165

Ubuntu 14.04 ESM:
  linux-image-4.15.0-1134-azure   4.15.0-1134.147~14.04.1
  linux-image-azure               4.15.0.1134.107

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.