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Ubuntu Security Notice USN-6967-1
August 19, 2024
intel-microcode vulnerabilities
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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® Core™ Ultra Processors did not properly
isolate the stream cache. A local authenticated user could potentially use
this to escalate their privileges. (CVE-2023-42667)
It was discovered that some Intel® Processors did not properly isolate the
stream cache. A local authenticated user could potentially use this to
escalate their privileges. (CVE-2023-49141)
It was discovered that some Intel® Processors did not correctly transition
between the executive monitor and SMI transfer monitor (STM). A privileged
local attacker could use this to escalate their privileges.
(CVE-2024-24853)
It was discovered that some 3rd, 4th, and 5th Generation Intel® Xeon®
Processors failed to properly implement a protection mechanism. A local
attacker could use this to potentially escalate their privileges.
(CVE-2024-24980)
It was discovered that some 3rd Generation Intel Xeon Scalable Processors
did not properly handle mirrored regions with different values. A
privileged local user could use this to cause a denial of service (system
crash). (CVE-2024-25939)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 24.04 LTS
  intel-microcode                 3.20240813.0ubuntu0.24.04.2
Ubuntu 22.04 LTS
  intel-microcode                 3.20240813.0ubuntu0.22.04.2
Ubuntu 20.04 LTS
  intel-microcode                 3.20240813.0ubuntu0.20.04.2
Ubuntu 18.04 LTS
  intel-microcode                 3.20240813.0ubuntu0.18.04.1+esm2
                                  Available with Ubuntu Pro
Ubuntu 16.04 LTS
  intel-microcode                 3.20240813.0ubuntu0.16.04.1+esm2
                                  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-6967-1
  CVE-2023-42667, CVE-2023-49141, CVE-2024-24853, CVE-2024-24980,
  CVE-2024-25939
Package Information:
  https://launchpad.net/ubuntu/+source/intel-microcode/3.20240813.0ubuntu0.24.04.2
  https://launchpad.net/ubuntu/+source/intel-microcode/3.20240813.0ubuntu0.22.04.2
  https://launchpad.net/ubuntu/+source/intel-microcode/3.20240813.0ubuntu0.20.04.2