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Ubuntu 18.04 LTS USN-6342-2 High: Linux Kernel Azure Threats Overview

ubuntu
Calendar Grey September 8, 2023
Dist Ubuntu Esm H88
Tackling diverse vulnerabilities within the Linux kernel for Azure cloud environments on Ubuntu platforms.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure-4.15: Linux kernel for Microsoft Azure Cloud systems

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

Details:

Tavis Ormandy discovered that some AMD processors did not properly handle

speculative execution of certain vector register instructions. A local

attacker could use this to expose sensitive information. (CVE-2023-20593)

Zheng Zhang discovered that the device-mapper implementation in the Linux

kernel did not properly handle locking during table_clear() operations. A

local attacker could use this to cause a denial of service (kernel

deadlock). (CVE-2023-2269)

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

file system implementation in the Linux kernel. A local attacker could

possibly use this to cause a denial of service (system crash).

(CVE-2023-2985)

It was discovered that the DVB Core driver in the Linux kernel did not

properly handle lo...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service high severity information exposure ubuntu linux kernel azure

Update Instructions

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

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  linux-image-4.15.0-1169-azure   4.15.0-1169.184
  linux-image-azure-lts-18.04     4.15.0.1169.137

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  linux-image-4.15.0-1169-azure   4.15.0-1169.184~16.04.1
  linux-image-azure               4.15.0.1169.153

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
  linux-image-4.15.0-1169-azure   4.15.0-1169.184~14.04.1
  linux-image-azure               4.15.0.1169.135

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-6342-1

CVE-2023-20593, CVE-2023-2269, CVE-2023-2985, CVE-2023-31084,

CVE-2023-3611, CVE-2023-3776

Ubuntu Security Notice USN-6342-2

Topics%20covered

Topics Covered

security advisory denial of service high severity information exposure ubuntu linux kernel azure

Package Information

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