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Ubuntu 20.04 LTS USN-6340-2 Critical: Kernel Denial Of Service

ubuntu
Calendar Grey September 8, 2023
Dist Ubuntu Esm H88
New patches issued for multiple Ubuntu Linux kernel iterations to resolve major vulnerabilities and improve system protection.
Several security issues were fixed in the Linux kernel.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS (Available with Ubuntu Pro) Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-gkeop: Linux kernel for Google Container Engine (GKE) systems - linux-raspi: Linux kernel for Raspberry Pi systems - linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors - linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems - linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems - linux-raspi-5.4: Linux kernel for Raspberry Pi systems Details: Ruihan Li discovered that the bluetooth subsystem in the Linux kernel did not properly perform permissions checks when handling HCI sockets. A physically proximate attacker could use this to cause a denial of service (bluetooth communication). (CVE-2023-2002) Zi Fan Tan discovered that the binder IPC implementation in the Linux kernel contained a use-after-free vulnerabili...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel system update security issues

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1029-xilinx-zynqmp 5.4.0-1029.33 linux-image-5.4.0-1076-gkeop 5.4.0-1076.80 linux-image-5.4.0-1093-raspi 5.4.0-1093.104 linux-image-gkeop 5.4.0.1076.74 linux-image-gkeop-5.4 5.4.0.1076.74 linux-image-raspi 5.4.0.1093.123 linux-image-raspi-hwe-18.04 5.4.0.1093.123 linux-image-raspi2 5.4.0.1093.123 linux-image-raspi2-hwe-18.04 5.4.0.1093.123 linux-image-xilinx-zynqmp 5.4.0.1029.31 Ubuntu 18.04 LTS (Available with Ubuntu Pro): linux-image-5.4.0-1093-raspi 5.4.0-1093.104~18.04.1 linux-image-5.4.0-1112-gcp 5.4.0-1112.121~18.04.1 linux-image-5.4.0-1115-azure 5.4.0-1115.122~18.04.1 linux-image-azure 5.4.0.1115.88 linux-image-gcp 5.4.0.1112.88 linux-image-raspi-hwe-18.04 5.4.0.1093.90 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-6340-2

https://ubuntu.com/security/notices/USN-6340-1

CVE-2023-2002, CVE-2023-21255, CVE-2023-2163, CVE-2023-2269,

CVE-2023-31084, CVE-2023-3268, CVE-2023-35823, CVE-2023-35824,

CVE-2023-35828

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6340-2

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu kernel system update security issues

Package Information

https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1076.80 https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1093.104 https://launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/5.4.0-1029.33

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