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Ubuntu 16.04 LTS USN-6577-1 critical: linux-aws kernel threats

ubuntu
Calendar Grey January 10, 2024
Dist Ubuntu Esm H88
USN-6577-1 alerts Ubuntu users regarding severe Linux kernel flaws influencing AWS, which present denial of service hazards.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

Details:

Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii

Oleksenko discovered that some AMD processors could leak stale data from

division operations in certain situations. A local attacker could possibly

use this to expose sensitive information. (CVE-2023-20588)

It was discovered that a race condition existed in the Linux kernel when

performing operations with kernel objects, leading to an out-of-bounds

write. A local attacker could use this to cause a denial of service (system

crash) or execute arbitrary code. (CVE-2023-45863)

Topics%20covered

Topics Covered

security advisory denial of service kernel ubuntu data leak linux-aws

Update Instructions

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

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   linux-image-4.4.0-1164-aws      4.4.0-1164.179
   linux-image-aws                 4.4.0.1164.168

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-6577-1

CVE-2023-20588, CVE-2023-45863

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6577-1

Topics%20covered

Topics Covered

security advisory denial of service kernel ubuntu data leak linux-aws

Package Information

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