USN-7149-1: Intel Microcode vulnerabilities

USN-7149-1: Intel Microcode vulnerabilities
11 December 2024

Several security issues were fixed in Intel Microcode.

Releases
Ubuntu 24.10
Ubuntu 24.04 LTS
Ubuntu 22.04 LTS
Ubuntu 20.04 LTS
Ubuntu 18.04 ESM
Ubuntu 16.04 ESM

Packages
intel-microcode - Processor microcode for Intel CPUs
Details
Avraham Shalev and Nagaraju N Kodalapura discovered that some Intel(R)
Xeon(R) processors did not properly restrict access to the memory
controller when using Intel(R) SGX. This may allow a local privileged
attacker to further escalate their privileges. (CVE-2024-21820,
CVE-2024-23918)

It was discovered that some 4th and 5th Generation Intel(R) Xeon(R)
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-2024-21853)

It was discovered that some Intel(R) 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(R) 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 24.10
intel-microcode - 3.20241112.0ubuntu0.24.10.1
Ubuntu 24.04
intel-microcode - 3.20241112.0ubuntu0.24.04.1
Ubuntu 22.04
intel-microcode - 3.20241112.0ubuntu0.22.04.1
Ubuntu 20.04
intel-microcode - 3.20241112.0ubuntu0.20.04.1
Ubuntu 18.04
intel-microcode - 3.20241112.0ubuntu0.18.04.1+esm1
Ubuntu 16.04
intel-microcode - 3.20241112.0ubuntu0.16.04.1+esm1
After a standard system update you need to reboot your computer to make
all the necessary changes.