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Ubuntu 18.04 LTS USN-5927-1 Critical: Azure Kernel Denial of Service

ubuntu
Calendar Grey March 7, 2023
Scroller Ubuntu
On April 14, 2023, Fedora released USN-1032-4 addressing severe kernel flaws impacting AWS, necessitating patches.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

Details:

It was discovered that the Upper Level Protocol (ULP) subsystem in the

Linux kernel did not properly handle sockets entering the LISTEN state in

certain protocols, leading to 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-2023-0461)

It was discovered that the System V IPC implementation in the Linux kernel

did not properly handle large shared memory counts. A local attacker could

use this to cause a denial of service (memory exhaustion). (CVE-2021-3669)

It was discovered that a use-after-free vulnerability existed in the SGI

GRU driver in the Linux kernel. A local attacker could possibly use this to

cause a denial of service (system crash) or possibly execute arbitrary

code. (CVE-2022-3424)

It was disc...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service kernel update ubuntu system crash local attacker use-after-free

Update Instructions

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

Ubuntu 18.04 LTS:
   linux-image-4.15.0-1162-azure   4.15.0-1162.177
   linux-image-azure-lts-18.04     4.15.0.1162.130

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-5927-1

CVE-2021-3669, CVE-2022-3424, CVE-2022-3521, CVE-2022-3545,

CVE-2022-3628, CVE-2022-36280, CVE-2022-3640, CVE-2022-41218,

CVE-2022-42328, CVE-2022-42329, CVE-2022-42895, CVE-2022-47929,

CVE-2023-0045, CVE-2023-0266, CVE-2023-0394, CVE-2023-0461,

CVE-2023-23455, CVE-2023-23559

Severity
critical
Lowest
Low
Medium
High
Critical

March 07, 2023

Topics%20covered

Topics Covered

security advisory denial of service kernel update ubuntu system crash local attacker use-after-free

Package Information

https://launchpad.net/ubuntu/+source/linux-azure-4.15/4.15.0-1162.177

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