[USN-7269-2] Intel Microcode vulnerabilities

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Ubuntu Security Notice USN-7269-2
February 24, 2025

intel-microcode vulnerabilities
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.04 LTS

Summary:

Several security issues were fixed in Intel Microcode.

Software Description:
- intel-microcode: Processor microcode for Intel CPUs

Details:

USN-7269-1 fixed vulnerabilities in Intel Microcode. This update provides
the corresponding updates for Ubuntu 24.04 LTS.

Original advisory details:

Ke Sun, Paul Grosen and Alyssa Milburn discovered that some Intel®
Processors did not properly implement Finite State Machines (FSMs) in
Hardware Logic. A local privileged attacker could use this issue to cause
a denial of service. (CVE-2024-31068)

It was discovered that some Intel® Processors with Intel® SGX did not
properly restrict access to the EDECCSSA user leaf function. A local
authenticated attacker could use this issue to cause a denial of
service. (CVE-2024-36293)

Ke Sun, Alyssa Milburn, Benoit Morgan, and Erik Bjorge discovered that the
UEFI firmware for some Intel® processors did not properly restrict
access. An authenticated local attacker could use this issue to cause a
denial of service. (CVE-2024-39279)

Update instructions:

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

Ubuntu 24.04 LTS
intel-microcode 3.20250211.0ubuntu0.24.04.1

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

References:
https://ubuntu.com/security/notices/USN-7269-2
https://ubuntu.com/security/notices/USN-7269-1
CVE-2024-31068, CVE-2024-36293, CVE-2024-39279

Package Information:
https://launchpad.net/ubuntu/+source/intel-microcode/3.20250211.0ubuntu0.24.04.1