Ubuntu 23.04 and 22.04 LTS USN-6502-1: Remote Code Execution and DoS Risk

ubuntu

November 21, 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-kvm: Linux kernel for cloud environments

- linux-lowlatency: Linux low latency kernel

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-starfive: Linux kernel for StarFive processors

- linux-aws-6.2: Linux kernel for Amazon Web Services (AWS) systems

- linux-hwe-6.2: Linux hardware enablement (HWE) kernel

- linux-lowlatency-hwe-6.2: Linux low latency kernel

Details:

Ivan D Barrera, Christopher Bednarz, Mustafa Ismail, and Shiraz Saleem

discovered that the InfiniBand RDMA driver in the Linux kernel did not

properly check for zero-length STAG or MR registration. A remote attacker

could possibly use this to execute arbitrary code. (CVE-2023-25775)

Yu Hao discovered that the UBI driver in the Linux kernel did not properly

check for MTD with zero erasesize during device attachment....

Read the Full Advisory

Topics Covered

security advisory denial of service remote code execution ubuntu system crash linux kernel

Update Instructions

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

Ubuntu 23.04:
   linux-image-6.2.0-1009-starfive  6.2.0-1009.10
   linux-image-6.2.0-1016-aws      6.2.0-1016.16
   linux-image-6.2.0-1017-kvm      6.2.0-1017.17
   linux-image-6.2.0-1017-lowlatency  6.2.0-1017.17
   linux-image-6.2.0-1017-lowlatency-64k  6.2.0-1017.17
   linux-image-6.2.0-1017-raspi    6.2.0-1017.19
   linux-image-6.2.0-37-generic    6.2.0-37.38
   linux-image-6.2.0-37-generic-64k  6.2.0-37.38
   linux-image-6.2.0-37-generic-lpae  6.2.0-37.38
   linux-image-aws                 6.2.0.1016.17
   linux-image-generic             6.2.0.37.37
   linux-image-generic-64k         6.2.0.37.37
   linux-image-generic-lpae        6.2.0.37.37
   linux-image-kvm                 6.2.0.1017.17
   linux-image-lowlatency          6.2.0.1017.17
   linux-image-lowlatency-64k      6.2.0.1017.17
   linux-image-raspi               6.2.0.1017.20
   linux-image-raspi-nolpae        6.2.0.1017.20
   linux-image-starfive            6.2.0.1009.12
   linux-image-virtual             6.2.0.37.37

Ubuntu 22.04 LTS:
   linux-image-6.2.0-1016-aws      6.2.0-1016.16~22.04.1
   linux-image-6.2.0-1017-lowlatency  6.2.0-1017.17~22.04.1
   linux-image-6.2.0-1017-lowlatency-64k  6.2.0-1017.17~22.04.1
   linux-image-6.2.0-37-generic    6.2.0-37.38~22.04.1
   linux-image-6.2.0-37-generic-64k  6.2.0-37.38~22.04.1
   linux-image-6.2.0-37-generic-lpae  6.2.0-37.38~22.04.1
   linux-image-aws                 6.2.0.1016.16~22.04.1
   linux-image-generic-64k-hwe-22.04  6.2.0.37.38~22.04.15
   linux-image-generic-hwe-22.04   6.2.0.37.38~22.04.15
   linux-image-generic-lpae-hwe-22.04  6.2.0.37.38~22.04.15
   linux-image-lowlatency-64k-hwe-22.04  6.2.0.1017.17~22.04.14
   linux-image-lowlatency-hwe-22.04  6.2.0.1017.17~22.04.14
   linux-image-virtual-hwe-22.04   6.2.0.37.38~22.04.15

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.