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Ubuntu 14.04 LTS USN-6396-3 Critical: Azure Kernel DoS Threats

ubuntu
Calendar Grey October 17, 2023
Dist Ubuntu Esm H88
Multiple vulnerabilities within the Ubuntu Linux kernel have been addressed. Ensure you upgrade your Azure environments to defend against potential threats.
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:

It was discovered that some AMD x86-64 processors with SMT enabled could

speculatively execute instructions using a return address from a sibling

thread. A local attacker could possibly use this to expose sensitive

information. (CVE-2022-27672)

Daniel Moghimi discovered that some Intel(R) Processors did not properly

clear microarchitectural state after speculative execution of various

instructions. A local unprivileged user could use this to obtain to

sensitive information. (CVE-2022-40982)

Yang Lan discovered that the GFS2 file system implementation in the Linux

kernel could attempt to dereference a null pointer in some situations. An

attacker could use this to construct a malicious GFS2 image that, when

mounted and operated on, could cause a denial of service (system crash).

(CVE-2023-3212)

It was discov...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service security issue system crash linux-azure

Update Instructions

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

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   linux-image-4.15.0-1170-azure   4.15.0-1170.185~14.04.1
   linux-image-azure               4.15.0.1170.136

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-6396-3

https://ubuntu.com/security/notices/USN-6396-1

CVE-2022-27672, CVE-2022-40982, CVE-2023-3212, CVE-2023-3863,

CVE-2023-40283, CVE-2023-4128

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6396-3

Topics%20covered

Topics Covered

security advisory denial of service security issue system crash linux-azure

Package Information

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