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Ubuntu 20.04 LTS USN-5368-1 Critical: linux-azure, linux-oracle, DoS

ubuntu
Calendar Grey April 6, 2022
Dist Ubuntu Esm H88
Several vulnerabilities addressed in the kernel packages for Ubuntu's linux-azure and linux-oracle, impacting system reliability.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure-5.13: Linux kernel for Microsoft Azure cloud systems

- linux-oracle-5.13: Linux kernel for Oracle Cloud systems

Details:

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

properly restrict pointer types in certain situations. A local attacker

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

execute arbitrary code. (CVE-2022-23222)

It was discovered that the network traffic control implementation in the

Linux kernel contained a use-after-free vulnerability. A local attacker

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

execute arbitrary code. (CVE-2022-1055)

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)

...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu administrative access linux-azure linux-oracle

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.13.0-1021-azure   5.13.0-1021.24~20.04.1
  linux-image-5.13.0-1025-oracle  5.13.0-1025.30~20.04.1
  linux-image-azure               5.13.0.1021.24~20.04.10
  linux-image-oracle              5.13.0.1025.30~20.04.1

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-5368-1

CVE-2021-28711, CVE-2021-28712, CVE-2021-28713, CVE-2021-28714,

CVE-2021-28715, CVE-2021-39685, CVE-2021-39698, CVE-2021-4135,

CVE-2021-4197, CVE-2021-43975, CVE-2021-44733, CVE-2021-45095,

CVE-2021-45402, CVE-2021-45480, CVE-2022-0264, CVE-2022-0382,

CVE-2022-0435, CVE-2022-0492, CVE-2022-0516, CVE-2022-0742,

CVE-2022-1055, CVE-2022-23222, CVE-2022-27666

Severity
critical
Lowest
Low
Medium
High
Critical

April 06, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu administrative access linux-azure linux-oracle

Package Information

https://launchpad.net/ubuntu/+source/linux-azure-5.13/5.13.0-1021.24~20.04.1
https://launchpad.net/ubuntu/+source/linux-oracle-5.13/5.13.0-1025.30~20.04.1

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