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Ubuntu 16.04 ESM: USN-5541-1 Moderate: Kernel Threats Overview

ubuntu
Calendar Grey July 28, 2022
Dist Ubuntu Esm H88
Several security issues resolved in Ubuntu's Azure Linux kernel, impacting various versions and enabling possible local exploits.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

Details:

Eric Biederman discovered that the cgroup process migration implementation

in the Linux kernel did not perform permission checks correctly in some

situations. A local attacker could possibly use this to gain administrative

privileges. (CVE-2021-4197)

Jann Horn discovered that the FUSE file system 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-2022-1011)

Duoming Zhou discovered that the 6pack protocol implementation in the Linux

kernel did not handle detach events properly in some situations, leading to

a use-after-free vulnerability. A local attacker could use this to cause a

denial of service (system crash). (CVE-2022-1198)

Duoming Zhou discovered that the AX.25 amateur radio protocol

implementation...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel issue ubuntu administrative access linux-azure

Update Instructions

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

Ubuntu 16.04 ESM:
  linux-image-4.15.0-1146-azure   4.15.0-1146.161~16.04.1
  linux-image-azure               4.15.0.1146.133

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-5541-1

CVE-2021-4197, CVE-2022-1011, CVE-2022-1198, CVE-2022-1199,

CVE-2022-1204, CVE-2022-1205, CVE-2022-1353, CVE-2022-1516,

CVE-2022-2380, CVE-2022-28388, CVE-2022-28389

July 28, 2022

Topics%20covered

Topics Covered

security advisory denial of service kernel issue ubuntu administrative access linux-azure

Package Information

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