1. Ubuntu Security Notices
  2. USN-5612-1

USN-5612-1: Intel Microcode vulnerability

Publication date

15 September 2022

Overview

A security issue was fixed in Intel Microcode.

Releases

Packages

Details

Pietro Borrello, Andreas Kogler, Martin Schwarzl, Daniel Gruss, Michael
Schwarz and Moritz Lipp discovered that some Intel processors did not
properly clear data between subsequent xAPIC MMIO reads. This could allow a
local attacker to compromise SGX enclaves.

Pietro Borrello, Andreas Kogler, Martin Schwarzl, Daniel Gruss, Michael
Schwarz and Moritz Lipp discovered that some Intel processors did not
properly clear data between subsequent xAPIC MMIO reads. This could allow a
local attacker to compromise SGX enclaves.

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
22.04 jammy intel-microcode –  3.20220809.0ubuntu0.22.04.1
20.04 focal intel-microcode –  3.20220809.0ubuntu0.20.04.1
18.04 bionic intel-microcode –  3.20220809.0ubuntu0.18.04.1

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References

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