==========================================================================
Ubuntu Security Notice USN-6495-2
November 30, 2023

linux-azure, linux-azure-5.4, linux-gcp, linux-gcp-5.4, linux-gkeop
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-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gkeop: Linux kernel for Google Container Engine (GKE) systems
- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems
- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems

Details:

Yu Hao discovered that the UBI driver in the Linux kernel did not properly
check for MTD with zero erasesize during device attachment. A local
privileged attacker could use this to cause a denial of service (system
crash). (CVE-2023-31085)

Manfred Rudigier discovered that the Intel(R) PCI-Express Gigabit (igb)
Ethernet driver in the Linux kernel did not properly validate received
frames that are larger than the set MTU size, leading to a buffer overflow
vulnerability. An attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code. (CVE-2023-45871)

Update instructions:

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1081-gkeop    5.4.0-1081.85
   linux-image-5.4.0-1118-gcp      5.4.0-1118.127
   linux-image-5.4.0-1120-azure    5.4.0-1120.127
   linux-image-azure-lts-20.04     5.4.0.1120.113
   linux-image-gcp-lts-20.04       5.4.0.1118.120
   linux-image-gkeop               5.4.0.1081.79
   linux-image-gkeop-5.4           5.4.0.1081.79

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-5.4.0-1118-gcp      5.4.0-1118.127~18.04.1
   linux-image-5.4.0-1120-azure    5.4.0-1120.127~18.04.1
   linux-image-azure               5.4.0.1120.93
   linux-image-gcp                 5.4.0.1118.94

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-6495-2
   https://ubuntu.com/security/notices/USN-6495-1
   CVE-2023-31085, CVE-2023-45871

Package Information:
   https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1120.127
   https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1118.127
   https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1081.85

Ubuntu 6495-2: Linux kernel vulnerabilities

November 30, 2023
Several security issues were fixed in the Linux kernel.

Summary

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-azure: Linux kernel for Microsoft Azure Cloud systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-gkeop: Linux kernel for Google Container Engine (GKE) systems - linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems - linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems Details: Yu Hao discovered that the UBI driver in the Linux kernel did not properly check for MTD with zero erasesize during device attachment. A local privileged attacker could use this to cause a denial of service (system crash). (CVE-2023-31085) Manfred Rudigier discovered that the Intel(R) PCI-Express Gigabit (igb) Ethernet driver in the Linux kernel did not properly validate received frames that are larger than the set MTU size, leading to a buffer overflow vulnerability. An attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2023-45871)

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: linux-image-5.4.0-1081-gkeop 5.4.0-1081.85 linux-image-5.4.0-1118-gcp 5.4.0-1118.127 linux-image-5.4.0-1120-azure 5.4.0-1120.127 linux-image-azure-lts-20.04 5.4.0.1120.113 linux-image-gcp-lts-20.04 5.4.0.1118.120 linux-image-gkeop 5.4.0.1081.79 linux-image-gkeop-5.4 5.4.0.1081.79 Ubuntu 18.04 LTS (Available with Ubuntu Pro): linux-image-5.4.0-1118-gcp 5.4.0-1118.127~18.04.1 linux-image-5.4.0-1120-azure 5.4.0-1120.127~18.04.1 linux-image-azure 5.4.0.1120.93 linux-image-gcp 5.4.0.1118.94 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-6495-2

https://ubuntu.com/security/notices/USN-6495-1

CVE-2023-31085, CVE-2023-45871

Severity
Ubuntu Security Notice USN-6495-2

Package Information

https://launchpad.net/ubuntu/+source/linux-azure/5.4.0-1120.127 https://launchpad.net/ubuntu/+source/linux-gcp/5.4.0-1118.127 https://launchpad.net/ubuntu/+source/linux-gkeop/5.4.0-1081.85

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