Ubuntu 22.04 LTS USN-6339-3 Critical Denial of Service Threats

ubuntu

September 11, 2023

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

- linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems

- linux-azure-fde-5.15: Linux kernel for Microsoft Azure CVM cloud systems

Details:

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

kernel did not properly validate MFT flags in certain situations. An

attacker could use this to construct a malicious NTFS image that, when

mounted and operated on, could cause a denial of service (system crash).

(CVE-2022-48425)

Zi Fan Tan discovered that the binder IPC implementation in the Linux

kernel contained a use-after-free vulnerability. A local attacker could use

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

arbitrary code. (CVE-2023-21255)

It w...

Read the Full Advisory

Topics Covered

security advisory denial of service Ubuntu kernel system crash linux-azure linux-raspi

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1037-raspi   5.15.0-1037.40
   linux-image-5.15.0-1046-azure   5.15.0-1046.53
   linux-image-5.15.0-1046-azure-fde  5.15.0-1046.53.1
   linux-image-azure-fde-lts-22.04  5.15.0.1046.53.24
   linux-image-azure-lts-22.04     5.15.0.1046.42
   linux-image-raspi               5.15.0.1037.35
   linux-image-raspi-nolpae        5.15.0.1037.35

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1046-azure   5.15.0-1046.53~20.04.1
   linux-image-5.15.0-1046-azure-fde  5.15.0-1046.53~20.04.1.1
   linux-image-azure               5.15.0.1046.53~20.04.35
   linux-image-azure-cvm           5.15.0.1046.53~20.04.35
   linux-image-azure-fde           5.15.0.1046.53~20.04.1.24

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.