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Ubuntu 23.10: USN-6454-2 Critical: Kernel Denial of Service

ubuntu
Calendar Grey October 30, 2023
Dist Ubuntu Esm H88
Recent updates to the Linux kernel address multiple vulnerabilities, essential for users operating on Ubuntu 23.10 and its related distributions.
Several security issues were fixed in the Linux kernel.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 23.10 Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi: Linux kernel for Raspberry Pi systems Details: Kyle Zeng discovered that the netfilter subsystem in the Linux kernel contained a race condition in IP set operations in certain situations. A local attacker could use this to cause a denial of service (system crash). (CVE-2023-42756) Alex Birnberg discovered that the netfilter subsystem in the Linux kernel did not properly validate register length, leading to an out-of- bounds write vulnerability. A local attacker could possibly use this to cause a denial of service (system cr...

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security advisory denial of service critical kernel ubuntu

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 23.10: linux-image-6.5.0-1006-raspi 6.5.0-1006.8 linux-image-6.5.0-1008-azure 6.5.0-1008.8 linux-image-6.5.0-1008-azure-fde 6.5.0-1008.8 linux-image-6.5.0-1008-gcp 6.5.0-1008.8 linux-image-6.5.0-1009-aws 6.5.0-1009.9 linux-image-6.5.0-1011-oracle 6.5.0-1011.11 linux-image-aws 6.5.0.1009.9 linux-image-azure 6.5.0.1008.10 linux-image-azure-fde 6.5.0.1008.10 linux-image-gcp 6.5.0.1008.8 linux-image-oracle 6.5.0.1011.11 linux-image-raspi 6.5.0.1006.7 linux-image-raspi-nolpae 6.5.0.1006.7 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-6454-2

https://ubuntu.com/security/notices/USN-6454-1

CVE-2023-42756, CVE-2023-4881, CVE-2023-4921, CVE-2023-5197

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Ubuntu Security Notice USN-6454-2

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Topics Covered

security advisory denial of service critical kernel ubuntu

Package Information

https://launchpad.net/ubuntu/+source/linux-aws/6.5.0-1009.9 https://launchpad.net/ubuntu/+source/linux-azure/6.5.0-1008.8 https://launchpad.net/ubuntu/+source/linux-gcp/6.5.0-1008.8 https://launchpad.net/ubuntu/+source/linux-oracle/6.5.0-1011.11 https://launchpad.net/ubuntu/+source/linux-raspi/6.5.0-1006.8

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