Ubuntu 20.04 LTS USN-6340-1 Critical: Kernel Issues Overview

ubuntu

September 5, 2023

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-aws: Linux kernel for Amazon Web Services (AWS) systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-ibm: Linux kernel for IBM cloud systems

- linux-iot: Linux kernel for IoT platforms

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems

- linux-hwe-5.4: Linux hardware enablement (HWE) kernel

- linux-oracle-5.4: Linux kernel for Oracle Cloud 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-...

Read the Full Advisory

Topics Covered

security advisory denial of service update instructions kernel issue ubuntu bluetooth

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1021-iot      5.4.0-1021.22
   linux-image-5.4.0-1056-ibm      5.4.0-1056.61
   linux-image-5.4.0-1098-kvm      5.4.0-1098.104
   linux-image-5.4.0-1108-oracle   5.4.0-1108.117
   linux-image-5.4.0-1109-aws      5.4.0-1109.118
   linux-image-5.4.0-1112-gcp      5.4.0-1112.121
   linux-image-5.4.0-162-generic   5.4.0-162.179
   linux-image-5.4.0-162-generic-lpae  5.4.0-162.179
   linux-image-5.4.0-162-lowlatency  5.4.0-162.179
   linux-image-aws-lts-20.04       5.4.0.1109.106
   linux-image-gcp-lts-20.04       5.4.0.1112.114
   linux-image-generic             5.4.0.162.159
   linux-image-generic-lpae        5.4.0.162.159
   linux-image-ibm-lts-20.04       5.4.0.1056.85
   linux-image-kvm                 5.4.0.1098.93
   linux-image-lowlatency          5.4.0.162.159
   linux-image-oem                 5.4.0.162.159
   linux-image-oem-osp1            5.4.0.162.159
   linux-image-oracle-lts-20.04    5.4.0.1108.101
   linux-image-virtual             5.4.0.162.159

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-5.4.0-1108-oracle   5.4.0-1108.117~18.04.1
   linux-image-5.4.0-1109-aws      5.4.0-1109.118~18.04.1
   linux-image-5.4.0-162-generic   5.4.0-162.179~18.04.1
   linux-image-5.4.0-162-lowlatency  5.4.0-162.179~18.04.1
   linux-image-aws                 5.4.0.1109.87
   linux-image-generic-hwe-18.04   5.4.0.162.179~18.04.129
   linux-image-lowlatency-hwe-18.04  5.4.0.162.179~18.04.129
   linux-image-oem                 5.4.0.162.179~18.04.129
   linux-image-oem-osp1            5.4.0.162.179~18.04.129
   linux-image-oracle              5.4.0.1108.117~18.04.80
   linux-image-snapdragon-hwe-18.04  5.4.0.162.179~18.04.129
   linux-image-virtual-hwe-18.04   5.4.0.162.179~18.04.129

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.