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Ubuntu 23.04: 6319-1 Critical: AMD Microcode Speculative Execution

ubuntu
Calendar Grey August 30, 2023
Dist Ubuntu Esm H88
Mitigating AMD Microcode flaw in Ubuntu platforms that risks leaking sensitive information via speculative execution processes.
AMD processors may allow an attacker to expose sensitive information due to a speculative execution vulnerability.

Summary

AMD processors may allow an attacker to expose sensitive information due to a

speculative execution vulnerability.

Software Description:

- amd64-microcode: Processor microcode firmware for AMD CPUs

Details:

Daniël Trujillo, Johannes Wikner, and Kaveh Razavi discovered that some AMD

processors utilising speculative execution and branch prediction may allow

unauthorised memory reads via a speculative side-channel attack. A local

attacker could use this to expose sensitive information, including kernel

memory.

Topics%20covered

Topics Covered

security advisory critical Ubuntu sensitive data speculative execution amd64-microcode

Update Instructions

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

Ubuntu 23.04:
  amd64-microcode                 3.20220411.1ubuntu3.2

Ubuntu 22.04 LTS:
  amd64-microcode                 3.20191218.1ubuntu2.2

Ubuntu 20.04 LTS:
  amd64-microcode                 3.20191218.1ubuntu1.2

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  amd64-microcode                 3.20191021.1+really3.20181128.1~ubuntu0.18.04.1+esm2

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  amd64-microcode                 3.20191021.1+really3.20180524.1~ubuntu0.16.04.2+esm2

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

References

https://ubuntu.com/security/notices/USN-6319-1

CVE-2023-20569

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6319-1

Topics%20covered

Topics Covered

security advisory critical Ubuntu sensitive data speculative execution amd64-microcode

Package Information

https://launchpad.net/ubuntu/+source/amd64-microcode/3.20220411.1ubuntu3.2
https://launchpad.net/ubuntu/+source/amd64-microcode/3.20191218.1ubuntu2.2
https://launchpad.net/ubuntu/+source/amd64-microcode/3.20191218.1ubuntu1.2

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