==========================================================================
Ubuntu Security Notice USN-7149-1
December 11, 2024

intel-microcode vulnerabilities
==========================================================================

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

- Ubuntu 24.10
- 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:

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 LTS
  intel-microcode                 3.20241112.0ubuntu0.24.04.1

Ubuntu 22.04 LTS
  intel-microcode                 3.20241112.0ubuntu0.22.04.1

Ubuntu 20.04 LTS
  intel-microcode                 3.20241112.0ubuntu0.20.04.1

Ubuntu 18.04 LTS
  intel-microcode                 3.20241112.0ubuntu0.18.04.1+esm1
                                  Available with Ubuntu Pro

Ubuntu 16.04 LTS
  intel-microcode                 3.20241112.0ubuntu0.16.04.1+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-7149-1
  CVE-2024-21820, CVE-2024-21853, CVE-2024-23918, CVE-2024-23984,
  CVE-2024-24968

Package Information:
  
  https://launchpad.net/ubuntu/+source/intel-microcode/3.20241112.0ubuntu0.24.04.1