1. Ubuntu Security Notices
  2. USN-4713-2

USN-4713-2: Linux kernel vulnerability

Publication date

10 February 2021

Overview

The system could allow unintended access to data in some environments.

Releases

Packages

Details

It was discovered that the LIO SCSI target implementation in the Linux
kernel performed insufficient identifier checking in certain XCOPY
requests. An attacker with access to at least one LUN in a multiple
backstore environment could use this to expose sensitive information or
modify data.

It was discovered that the LIO SCSI target implementation in the Linux
kernel performed insufficient identifier checking in certain XCOPY
requests. An attacker with access to at least one LUN in a multiple
backstore environment could use this to expose sensitive information or
modify data.

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
18.04 bionic linux-image-5.0.0-1051-gke –  5.0.0-1051.53
linux-image-5.3.0-1037-raspi2 –  5.3.0-1037.39
linux-image-5.3.0-1040-gke –  5.3.0-1040.43
linux-image-5.3.0-70-generic –  5.3.0-70.66
linux-image-5.3.0-70-lowlatency –  5.3.0-70.66
linux-image-gke-5.0 –  5.0.0.1051.35
linux-image-gke-5.3 –  5.3.0.1040.23
linux-image-gkeop-5.3 –  5.3.0.70.127
linux-image-raspi2-hwe-18.04 –  5.3.0.1037.26
14.04 trusty linux-image-3.13.0-184-generic –  3.13.0-184.235
linux-image-3.13.0-184-generic-lpae –  3.13.0-184.235
linux-image-3.13.0-184-lowlatency –  3.13.0-184.235
linux-image-3.13.0-184-powerpc-e500 –  3.13.0-184.235
linux-image-3.13.0-184-powerpc-e500mc –  3.13.0-184.235
linux-image-3.13.0-184-powerpc-smp –  3.13.0-184.235
linux-image-3.13.0-184-powerpc64-emb –  3.13.0-184.235
linux-image-3.13.0-184-powerpc64-smp –  3.13.0-184.235
linux-image-generic –  3.13.0.184.193
linux-image-generic-lpae –  3.13.0.184.193
linux-image-generic-pae –  3.13.0.184.193
linux-image-highbank –  3.13.0.184.193
linux-image-lowlatency –  3.13.0.184.193
linux-image-lowlatency-pae –  3.13.0.184.193
linux-image-omap –  3.13.0.184.193
linux-image-powerpc-e500 –  3.13.0.184.193
linux-image-powerpc-e500mc –  3.13.0.184.193
linux-image-powerpc-smp –  3.13.0.184.193
linux-image-powerpc64-emb –  3.13.0.184.193
linux-image-powerpc64-smp –  3.13.0.184.193
linux-image-server –  3.13.0.184.193
linux-image-virtual –  3.13.0.184.193

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References

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