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Alerts This Week
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Ubuntu 20.04 LTS USN-4753-1 Critical: Linux OEM Kernel Access Issue

ubuntu
Calendar Grey February 25, 2021
Dist Ubuntu Esm H88
Ubuntu Security Alert USN-4752-2 highlights a vulnerability in linux-oem-5.8, essential for ensuring safe system operations.
The system could allow unintended access to data in some environments.

Summary

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

Software Description:

- linux-oem-5.10: Linux kernel for OEM systems

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. (CVE-2020-28374)

Topics%20covered

Topics Covered

security advisory critical issue kernel update critical update instructions ubuntu system security linux kernel data access linux-oem

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.10.0-1014-oem     5.10.0-1014.15
  linux-image-oem-20.04b          5.10.0.1014.15

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.

References

https://ubuntu.com/security/notices/USN-4753-1

CVE-2020-28374, CVE-2021-3178

Severity
critical
Lowest
Low
Medium
High
Critical

February 25, 2021

Topics%20covered

Topics Covered

security advisory critical issue kernel update critical update instructions ubuntu system security linux kernel data access linux-oem

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.10/5.10.0-1014.15

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