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Ubuntu Security Notice USN-5486-1

Ubuntu Security Notice USN-5486-1
Posted Jun 20, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5486-1 - It was discovered that some Intel processors did not implement sufficient control flow management. A local attacker could use this to cause a denial of service. Joseph Nuzman discovered that some Intel processors did not properly initialise shared resources. A local attacker could use this to obtain sensitive information. Mark Ermolov, Dmitry Sklyarov and Maxim Goryachy discovered that some Intel processors did not prevent test and debug logic from being activated at runtime. A local attacker could use this to escalate privileges.

tags | advisory, denial of service, local
systems | linux, ubuntu
advisories | CVE-2021-0127, CVE-2021-0145, CVE-2021-0146, CVE-2021-33117, CVE-2021-33120, CVE-2022-21127, CVE-2022-21151, CVE-2022-21166
SHA-256 | 7154bcd5aff205c57ae30b210e1bde57d7de007b20d635b85df4852970237c7e

Ubuntu Security Notice USN-5486-1

Change Mirror Download
==========================================================================
Ubuntu Security Notice USN-5486-1
June 20, 2022

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

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

- Ubuntu 22.04 LTS
- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 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 implement sufficient
control flow management. A local attacker could use this to cause a denial
of service. (CVE-2021-0127)

Joseph Nuzman discovered that some Intel processors did not properly
initialise shared resources. A local attacker could use this to obtain
sensitive information. (CVE-2021-0145)

Mark Ermolov, Dmitry Sklyarov and Maxim Goryachy discovered that some Intel
processors did not prevent test and debug logic from being activated at
runtime. A local attacker could use this to escalate
privileges. (CVE-2021-0146)

It was discovered that some Intel processors did not properly restrict
access in some situations. A local attacker could use this to obtain
sensitive information. (CVE-2021-33117)

Brandon Miller discovered that some Intel processors did not properly
restrict access in some situations. A local attacker could use this to
obtain sensitive information or a remote attacker could use this to cause a
denial of service. (CVE-2021-33120)

It was discovered that some Intel processors did not completely perform
cleanup actions on multi-core shared buffers. A local attacker could
possibly use this to expose sensitive information. (CVE-2022-21123,
CVE-2022-21127)

Alysa Milburn, Jason Brandt, Avishai Redelman and Nir Lavi discovered that
some Intel processors improperly optimised security-critical code. A local
attacker could possibly use this to expose sensitive
information. (CVE-2022-21151)

It was discovered that some Intel processors did not properly perform
cleanup during specific special register write operations. A local attacker
could possibly use this to expose sensitive information. (CVE-2022-21166)

Update instructions:

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

Ubuntu 22.04 LTS:
intel-microcode 3.20220510.0ubuntu0.22.04.1

Ubuntu 21.10:
intel-microcode 3.20220510.0ubuntu0.21.10.1

Ubuntu 20.04 LTS:
intel-microcode 3.20220510.0ubuntu0.20.04.1

Ubuntu 18.04 LTS:
intel-microcode 3.20220510.0ubuntu0.18.04.1

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

References:
https://ubuntu.com/security/notices/USN-5486-1
CVE-2021-0127, CVE-2021-0145, CVE-2021-0146, CVE-2021-33117,
CVE-2021-33120, CVE-2022-21123, CVE-2022-21127, CVE-2022-21151,
CVE-2022-21166

Package Information:
https://launchpad.net/ubuntu/+source/intel-microcode/3.20220510.0ubuntu0.22.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20220510.0ubuntu0.21.10.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20220510.0ubuntu0.20.04.1
https://launchpad.net/ubuntu/+source/intel-microcode/3.20220510.0ubuntu0.18.04.1
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