==========================================================================
Ubuntu Security Notice USN-6605-1
January 25, 2024

linux, linux-aws, linux-aws-5.4, linux-azure, linux-azure-5.4,
linux-bluefield, linux-gcp, linux-gcp-5.4, linux-gkeop, linux-hwe-5.4,
linux-ibm, linux-ibm-5.4, linux-iot, linux-oracle, linux-oracle-5.4,
linux-raspi, linux-raspi-5.4, linux-xilinx-zynqmp vulnerabilities
==========================================================================

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: Linux kernel
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-bluefield: Linux kernel for NVIDIA BlueField platforms
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-iot: Linux kernel for IoT platforms
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-raspi: Linux kernel for Raspberry Pi systems
- linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors
- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems
- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems
- linux-hwe-5.4: Linux hardware enablement (HWE) kernel
- linux-ibm-5.4: Linux kernel for IBM cloud systems
- linux-oracle-5.4: Linux kernel for Oracle Cloud systems
- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

Lin Ma discovered that the netfilter subsystem in the Linux kernel did not
properly validate network family support while creating a new netfilter
table. A local attacker could use this to cause a denial of service or
possibly execute arbitrary code. (CVE-2023-6040)

It was discovered that the CIFS network file system implementation in the
Linux kernel did not properly validate the server frame size in certain
situation, leading to an out-of-bounds read vulnerability. An attacker
could use this to construct a malicious CIFS image that, when operated on,
could cause a denial of service (system crash) or possibly expose sensitive
information. (CVE-2023-6606)

Budimir Markovic, Lucas De Marchi, and Pengfei Xu discovered that the perf
subsystem in the Linux kernel did not properly validate all event sizes
when attaching new events, leading to an out-of-bounds write vulnerability.
A local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code. (CVE-2023-6931)

It was discovered that the IGMP protocol implementation in the Linux kernel
contained a race condition, leading to 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-2023-6932)

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-iot      5.4.0-1029.30
   linux-image-5.4.0-1036-xilinx-zynqmp  5.4.0-1036.40
   linux-image-5.4.0-1064-ibm      5.4.0-1064.69
   linux-image-5.4.0-1077-bluefield  5.4.0-1077.83
   linux-image-5.4.0-1084-gkeop    5.4.0-1084.88
   linux-image-5.4.0-1101-raspi    5.4.0-1101.113
   linux-image-5.4.0-1116-oracle   5.4.0-1116.125
   linux-image-5.4.0-1117-aws      5.4.0-1117.127
   linux-image-5.4.0-1121-gcp      5.4.0-1121.130
   linux-image-5.4.0-1122-azure    5.4.0-1122.129
   linux-image-5.4.0-170-generic   5.4.0-170.188
   linux-image-5.4.0-170-generic-lpae  5.4.0-170.188
   linux-image-5.4.0-170-lowlatency  5.4.0-170.188
   linux-image-aws-lts-20.04       5.4.0.1117.114
   linux-image-azure-lts-20.04     5.4.0.1122.115
   linux-image-bluefield           5.4.0.1077.72
   linux-image-gcp-lts-20.04       5.4.0.1121.123
   linux-image-generic             5.4.0.170.168
   linux-image-generic-lpae        5.4.0.170.168
   linux-image-gkeop               5.4.0.1084.82
   linux-image-gkeop-5.4           5.4.0.1084.82
   linux-image-ibm-lts-20.04       5.4.0.1064.93
   linux-image-lowlatency          5.4.0.170.168
   linux-image-oem                 5.4.0.170.168
   linux-image-oem-osp1            5.4.0.170.168
   linux-image-oracle-lts-20.04    5.4.0.1116.109
   linux-image-raspi               5.4.0.1101.131
   linux-image-raspi2              5.4.0.1101.131
   linux-image-virtual             5.4.0.170.168
   linux-image-xilinx-zynqmp       5.4.0.1036.36

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-5.4.0-1064-ibm      5.4.0-1064.69~18.04.1
   linux-image-5.4.0-1101-raspi    5.4.0-1101.113~18.04.1
   linux-image-5.4.0-1116-oracle   5.4.0-1116.125~18.04.1
   linux-image-5.4.0-1117-aws      5.4.0-1117.127~18.04.1
   linux-image-5.4.0-1121-gcp      5.4.0-1121.130~18.04.1
   linux-image-5.4.0-1122-azure    5.4.0-1122.129~18.04.1
   linux-image-5.4.0-170-generic   5.4.0-170.188~18.04.1
   linux-image-5.4.0-170-lowlatency  5.4.0-170.188~18.04.1
   linux-image-aws                 5.4.0.1117.95
   linux-image-azure               5.4.0.1122.95
   linux-image-gcp                 5.4.0.1121.97
   linux-image-generic-hwe-18.04   5.4.0.170.188~18.04.138
   linux-image-ibm                 5.4.0.1064.74
   linux-image-lowlatency-hwe-18.04  5.4.0.170.188~18.04.138
   linux-image-oem                 5.4.0.170.188~18.04.138
   linux-image-oem-osp1            5.4.0.170.188~18.04.138
   linux-image-oracle              5.4.0.1116.125~18.04.88
   linux-image-raspi-hwe-18.04     5.4.0.1101.98
   linux-image-snapdragon-hwe-18.04  5.4.0.170.188~18.04.138
   linux-image-virtual-hwe-18.04   5.4.0.170.188~18.04.138

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-6605-1
   CVE-2023-6040, CVE-2023-6606, CVE-2023-6931, CVE-2023-6932

Package Information:
   https://launchpad.net/ubuntu/+source/linux/5.4.0-170.188
   https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1117.127
   https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1122.129
   https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1077.83
   https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1121.130
   https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1084.88
   https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1064.69
   https://launchpad.net/ubuntu/+source/linux-iot/5.4.0-1029.30
   https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1116.125
   https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1101.113
   https://launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/5.4.0-1036.40