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Ubuntu Security Notice USN-7033-1
September 25, 2024

intel-microcode vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 24.04 LTS
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS

Summary:

Several security issues were fixed in Intel Microcode.

Software Description:

• intel-microcode: Processor microcode for Intel CPUs

Details:

It was discovered that some Intel® Processors did not properly restrict
access to the Running Average Power Limit (RAPL) interface. This may allow
a local privileged attacker to obtain sensitive information.
(CVE-2024-23984)

It was discovered that some Intel® Processors did not properly implement
finite state machines (FSMs) in hardware logic. This may allow a local
privileged attacker to cause a denial of service (system crash).
(CVE-2024-24968)

Update instructions:

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

Ubuntu 24.04 LTS
intel-microcode 3.20240910.0ubuntu0.24.04.1

Ubuntu 22.04 LTS
intel-microcode 3.20240910.0ubuntu0.22.04.1

Ubuntu 20.04 LTS
intel-microcode 3.20240910.0ubuntu0.20.04.1

Ubuntu 18.04 LTS
intel-microcode 3.20240910.0ubuntu0.18.04.1+esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
intel-microcode 3.20240910.0ubuntu0.16.04.1+esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-7033-1
CVE-2024-23984, CVE-2024-24968

Package Information:
https://launchpad.net/ubuntu/+source/intel-microcode/3.20240910.0ubuntu0.24.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20240910.0ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20240910.0ubuntu0.20.04.1