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Ubuntu 23.04 USN-6286-1 Critical Intel Microcode Info Disclosure

ubuntu
Calendar Grey August 14, 2023
Dist Ubuntu Esm H88
Various problems addressed in Intel Microcode revisions for Ubuntu versions 16.04 to 23.04, tackling potential security vulnerabilities.
Several security issues were fixed in Intel Microcode.

Summary

Several security issues were fixed in Intel Microcode.

Software Description:

- intel-microcode: Processor microcode for Intel CPUs

Details:

Daniel Moghimi discovered that some Intel(R) Processors did not properly clear

microarchitectural state after speculative execution of various instructions. A

local unprivileged user could use this to obtain to sensitive

information. (CVE-2022-40982)

It was discovered that some Intel(R) Xeon(R) Processors did not properly

restrict error injection for Intel(R) SGX or Intel(R) TDX. A local privileged

user could use this to further escalate their privileges. (CVE-2022-41804)

It was discovered that some 3rd Generation Intel(R) Xeon(R) Scalable processors

did not properly restrict access in some situations. A local privileged attacker

could use this to obtain sensitive information. (CVE-2023-23908)

Topics%20covered

Topics Covered

security advisory critical privilege escalation Ubuntu information disclosure intel-microcode

Update Instructions

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

Ubuntu 23.04:
  intel-microcode                 3.20230808.0ubuntu1

Ubuntu 22.04 LTS:
  intel-microcode                 3.20230808.0ubuntu0.22.04.1

Ubuntu 20.04 LTS:
  intel-microcode                 3.20230808.0ubuntu0.20.04.1

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  intel-microcode                 3.20230808.0ubuntu0.18.04.1+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  intel-microcode                 3.20230808.0ubuntu0.16.04.1+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-6286-1

CVE-2022-40982, CVE-2022-41804, CVE-2023-23908

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6286-1

Topics%20covered

Topics Covered

security advisory critical privilege escalation Ubuntu information disclosure intel-microcode

Package Information

https://launchpad.net/ubuntu/+source/intel-microcode/3.20230808.0ubuntu1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20230808.0ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20230808.0ubuntu0.20.04.1

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