[USN-6495-1] Linux kernel vulnerabilities
==========================================================================
Ubuntu Security Notice USN-6495-1
November 21, 2023
linux, linux-aws, linux-aws-5.4, linux-bluefield, linux-hwe-5.4,
linux-ibm, linux-ibm-5.4, linux-iot, linux-kvm, 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-bluefield: Linux kernel for NVIDIA BlueField platforms
- 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-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-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:
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-5.4.0-1026-iot 5.4.0-1026.27
linux-image-5.4.0-1034-xilinx-zynqmp 5.4.0-1034.38
linux-image-5.4.0-1061-ibm 5.4.0-1061.66
linux-image-5.4.0-1075-bluefield 5.4.0-1075.81
linux-image-5.4.0-1098-raspi 5.4.0-1098.110
linux-image-5.4.0-1103-kvm 5.4.0-1103.110
linux-image-5.4.0-1113-oracle 5.4.0-1113.122
linux-image-5.4.0-1114-aws 5.4.0-1114.124
linux-image-5.4.0-167-generic 5.4.0-167.184
linux-image-5.4.0-167-generic-lpae 5.4.0-167.184
linux-image-5.4.0-167-lowlatency 5.4.0-167.184
linux-image-aws-lts-20.04 5.4.0.1114.111
linux-image-bluefield 5.4.0.1075.70
linux-image-generic 5.4.0.167.164
linux-image-generic-lpae 5.4.0.167.164
linux-image-ibm-lts-20.04 5.4.0.1061.90
linux-image-kvm 5.4.0.1103.99
linux-image-lowlatency 5.4.0.167.164
linux-image-oem 5.4.0.167.164
linux-image-oem-osp1 5.4.0.167.164
linux-image-oracle-lts-20.04 5.4.0.1113.106
linux-image-raspi 5.4.0.1098.128
linux-image-raspi2 5.4.0.1098.128
linux-image-virtual 5.4.0.167.164
linux-image-xilinx-zynqmp 5.4.0.1034.34
Ubuntu 18.04 LTS (Available with Ubuntu Pro):
linux-image-5.4.0-1061-ibm 5.4.0-1061.66~18.04.1
linux-image-5.4.0-1098-raspi 5.4.0-1098.110~18.04.2
linux-image-5.4.0-1113-oracle 5.4.0-1113.122~18.04.1
linux-image-5.4.0-1114-aws 5.4.0-1114.124~18.04.1
linux-image-5.4.0-167-generic 5.4.0-167.184~18.04.1
linux-image-5.4.0-167-lowlatency 5.4.0-167.184~18.04.1
linux-image-aws 5.4.0.1114.92
linux-image-generic-hwe-18.04 5.4.0.167.184~18.04.135
linux-image-ibm 5.4.0.1061.72
linux-image-lowlatency-hwe-18.04 5.4.0.167.184~18.04.135
linux-image-oem 5.4.0.167.184~18.04.135
linux-image-oem-osp1 5.4.0.167.184~18.04.135
linux-image-oracle 5.4.0.1113.122~18.04.85
linux-image-raspi-hwe-18.04 5.4.0.1098.95
linux-image-snapdragon-hwe-18.04 5.4.0.167.184~18.04.135
linux-image-virtual-hwe-18.04 5.4.0.167.184~18.04.135
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-6495-1
CVE-2023-31085, CVE-2023-45871
Package Information:
https://launchpad.net/ubuntu/+source/linux/5.4.0-167.184
https://launchpad.net/ubuntu/+source/linux-aws/5.4.0-1114.124
https://launchpad.net/ubuntu/+source/linux-bluefield/5.4.0-1075.81
https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1061.66
https://launchpad.net/ubuntu/+source/linux-iot/5.4.0-1026.27
https://launchpad.net/ubuntu/+source/linux-kvm/5.4.0-1103.110
https://launchpad.net/ubuntu/+source/linux-oracle/5.4.0-1113.122
https://launchpad.net/ubuntu/+source/linux-raspi/5.4.0-1098.110
https://launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/5.4.0-1034.38
A Linux kernel security update has been released for Ubuntu Linux 18.04 LTS and 20.04 LTS.
