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Ubuntu 20.04 LTS USN-6347-1 Moderate: Multiple Kernel DoS Issues

ubuntu
Calendar Grey September 6, 2023
Dist Ubuntu Esm H88
Several vulnerabilities in the Ubuntu Linux kernel necessitate immediate updates to bolster system defenses 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-fde-5.15: Linux kernel for Microsoft Azure CVM cloud systems

Details:

William Zhao discovered that the Traffic Control (TC) subsystem in the

Linux kernel did not properly handle network packet retransmission in

certain situations. A local attacker could use this to cause a denial of

service (kernel deadlock). (CVE-2022-4269)

It was discovered that the NTFS file system implementation in the Linux

kernel did not properly check buffer indexes in certain situations, leading

to an out-of-bounds read vulnerability. A local attacker could possibly use

this to expose sensitive information (kernel memory). (CVE-2022-48502)

Seth Jenkins discovered that the Linux kernel did not properly perform

address randomization for a per-cpu memory management structure. A local

attacker could use this to expose sensitive information (kernel memory) or

in conjunction with another kernel vu...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory moderate denial of service kernel ubuntu cloud cvm

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1043-azure-fde  5.15.0-1043.50~20.04.1.1
   linux-image-azure-fde           5.15.0.1043.50~20.04.1.22

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-6347-1

CVE-2022-4269, CVE-2022-48502, CVE-2023-0597, CVE-2023-1611,

CVE-2023-1855, CVE-2023-1990, CVE-2023-2002, CVE-2023-2124,

CVE-2023-2163, CVE-2023-2194, CVE-2023-2235, CVE-2023-2269,

CVE-2023-23004, CVE-2023-28466, CVE-2023-30772, CVE-2023-3141,

CVE-2023-32248, CVE-2023-3268, CVE-2023-33203, CVE-2023-33288,

CVE-2023-35823, CVE-2023-35824, CVE-2023-35828, CVE-2023-35829

Ubuntu Security Notice USN-6347-1

Topics%20covered

Topics Covered

security advisory moderate denial of service kernel ubuntu cloud cvm

Package Information

https://launchpad.net/ubuntu/+source/linux-azure-fde-5.15/5.15.0-1043.50~20.04.1.1

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