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Ubuntu 14.04 LTS: USN-6647-2 - Denial of Service Threats in Linux Kernel

ubuntu
Calendar Grey February 29, 2024
Dist Ubuntu Esm H88
Multiple security issues within the Linux kernel on Ubuntu 14.04 LTS have been addressed. It is critical to perform system updates to maintain security and performance on Azure.
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 a race condition existed in the ATM (Asynchronous

Transfer Mode) subsystem of the Linux kernel, 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-2023-51780)

It was discovered that a race condition existed in the Rose X.25 protocol

implementation in the Linux kernel, 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-2023-51782)

It was discovered that the netfilter connection tracker for netlink in the

Linux kernel did not properly perform reference counting in some error

conditions. A local attacker could possibly use this to cause a denial of

service (memory exhaustion)...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service security issue update instructions 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-4.15.0-1174-azure   4.15.0-1174.189~14.04.1
   linux-image-azure               4.15.0.1174.140

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-6647-2

https://ubuntu.com/security/notices/USN-6647-1

CVE-2023-51780, CVE-2023-51782, CVE-2023-7192

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6647-2

Topics%20covered

Topics Covered

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

Package Information

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