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Ubuntu 23.04: 6244-1 Critical AMD Execution Flaw Exposes Information

ubuntu
Calendar Grey July 25, 2023
Dist Ubuntu Esm H88
Intel CPUs suffer from a major security loophole that might leak confidential data. Linux patches now accessible.
AMD processors may allow an attacker to expose sensitive information due to a vector register speculative execution vulnerability.

Summary

AMD processors may allow an attacker to expose sensitive information due

to a vector register speculative execution vulnerability.

Software Description:

- amd64-microcode: Processor microcode firmware for AMD CPUs

Details:

Tavis Ormandy discovered that some AMD processors did not properly

handle speculative execution of certain vector register instructions. A

local attacker could use this to expose sensitive information.

Topics%20covered

Topics Covered

security advisory Ubuntu update instructions sensitive information execution flaw AMD microcode

Update Instructions

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

Ubuntu 23.04:
  amd64-microcode                 3.20220411.1ubuntu3.1

Ubuntu 22.04 LTS:
  amd64-microcode                 3.20191218.1ubuntu2.1

Ubuntu 20.04 LTS:
  amd64-microcode                 3.20191218.1ubuntu1.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  amd64-microcode                 3.20191021.1+really3.20181128.1~ubuntu0.18.04.1+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  amd64-microcode                 3.20191021.1+really3.20180524.1~ubuntu0.16.04.2+esm1

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

References

https://ubuntu.com/security/notices/USN-6244-1

CVE-2023-20593

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6244-1

Topics%20covered

Topics Covered

security advisory Ubuntu update instructions sensitive information execution flaw AMD microcode

Package Information

https://launchpad.net/ubuntu/+source/amd64-microcode/3.20220411.1ubuntu3.1
https://launchpad.net/ubuntu/+source/amd64-microcode/3.20191218.1ubuntu2.1
https://launchpad.net/ubuntu/+source/amd64-microcode/3.20191218.1ubuntu1.1

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