1. Ubuntu Security Notices
  2. USN-6286-1

USN-6286-1: Intel Microcode vulnerabilities

Publication date

14 August 2023

Overview

Several security issues were fixed in Intel Microcode.

Releases

Packages

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)

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)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
23.04 lunar intel-microcode –  3.20230808.0ubuntu1
22.04 jammy intel-microcode –  3.20230808.0ubuntu0.22.04.1
20.04 focal intel-microcode –  3.20230808.0ubuntu0.20.04.1
18.04 bionic intel-microcode –  3.20230808.0ubuntu0.18.04.1+esm1  
16.04 xenial intel-microcode –  3.20230808.0ubuntu0.16.04.1+esm1  

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References

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