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Ubuntu 22.10 USN-5878-1 Critical: Linux Kernel Azure Denial Of Service

ubuntu
Calendar Grey February 16, 2023
Dist Ubuntu Esm H88
Critical flaws discovered in the linux-azure kernel of Ubuntu necessitate immediate patching to avert possible security risks.
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 the Bluetooth HCI implementation in the Linux kernel

did not properly deallocate memory in some situations. An attacker could

possibly use this cause a denial of service (memory exhaustion).

(CVE-2022-3619)

It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux

kernel did not properly perform bounds checking in some situations. A

physically proximate attacker could use this to craft a malicious USB

device that when inserted, could cause a denial of service (system crash)

or possibly execute arbitrary code. (CVE-2022-3628)

It was discovered that a use-after-free vulnerability existed in the

Bluetooth stack in the Linux kernel. A local attacker could use this to

cause a denial of service (system crash) or possibly execute arbitrary

code. (CVE-2022-3640)

Tamás Koczka ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical bluetooth linux-azure

Update Instructions

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

Ubuntu 22.10:
   linux-image-5.19.0-1020-azure   5.19.0-1020.21
   linux-image-azure               5.19.0.1020.16

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-5878-1

CVE-2022-3619, CVE-2022-3628, CVE-2022-3640, CVE-2022-42895,

CVE-2023-0590

Severity
critical
Lowest
Low
Medium
High
Critical

February 16, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical bluetooth linux-azure

Package Information

https://launchpad.net/ubuntu/+source/linux-azure/5.19.0-1020.21

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