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Ubuntu 23.10 USN-6573-1 Critical: linux-azure Denial of Service Issues

ubuntu
Calendar Grey January 9, 2024
Dist Ubuntu Esm H88
Ubuntu 23.10's linux-azure kernel upgrades tackle serious memory control flaws that pose threats of service interruptions.
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:

Lucas Leong discovered that the netfilter subsystem in the Linux kernel did

not properly validate some attributes passed from userspace. A local

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

possibly expose sensitive information (kernel memory). (CVE-2023-39189)

Kyle Zeng discovered that the IPv4 implementation in the Linux kernel did

not properly handle socket buffers (skb) when performing IP routing in

certain circumstances, leading to a null pointer dereference vulnerability.

A privileged attacker could use this to cause a denial of service (system

crash). (CVE-2023-42754)

Yikebaer Aizezi discovered that the ext4 file system implementation in the

Linux kernel contained a use-after-free vulnerability when handling inode

extent metadata. An attacker could use this to construct a malic...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service system update memory issue ubuntu azure kernel

Update Instructions

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

Ubuntu 23.10:
   linux-image-6.5.0-1010-azure    6.5.0-1010.10
   linux-image-6.5.0-1010-azure-fde  6.5.0-1010.10
   linux-image-azure               6.5.0.1010.12
   linux-image-azure-fde           6.5.0.1010.12

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-6573-1

CVE-2023-39189, CVE-2023-42754, CVE-2023-45898, CVE-2023-5158,

CVE-2023-5178, CVE-2023-5717

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6573-1

Topics%20covered

Topics Covered

security advisory denial of service system update memory issue ubuntu azure kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-azure/6.5.0-1010.10

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