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BIOS Reference Code Advisory

Intel ID: INTEL-SA-00562
Advisory Category: Firmware
Impact of vulnerability: Escalation of Privilege
Severity rating: HIGH
Original release: 11/09/2021
Last revised: 11/09/2021

Summary: 

Potential security vulnerabilities in the BIOS reference code for some Intel® Processors may allow escalation of privilege.  Intel is releasing firmware updates to mitigate these potential vulnerabilities.

Vulnerability Details:

CVEID: CVE-2021-0157

Description: Insufficient control flow management in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 8.2 High

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

 

CVEID: CVE-2021-0158

Description: Improper input validation in the BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access.

CVSS Base Score: 8.2 High

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

 

Affected Products:

  • Intel® Xeon® Processor E Family
  • Intel® Xeon® Processor E3 v6 Family
  • Intel® Xeon® Processor W Family
  • 3rd Generation Intel® Xeon® Scalable Processors
  • 11th Generation Intel® Core™ Processors
  • 10th Generation Intel® Core™ Processors
  • 8th Generation Intel® Core™ Processors
  • 7th Generation Intel® Core™ Processors
  • Intel® Core™ X-series Processors
  • Intel® Celeron® Processor N Series
  • Intel® Pentium® Silver Processor Series

Recommendations:

Intel recommends that users of affected Intel® Processors update to the latest version provided by the system manufacturer that addresses these issues.

Acknowledgements:

Intel would like to thank Itai Liba and Assaf Carlsbad from SentinelOne for reporting these issues.

Intel, and nearly the entire technology industry, follows a disclosure practice called Coordinated Disclosure, under which a cybersecurity vulnerability is generally publicly disclosed only after mitigations are available.

Revision History

Revision Date Description
1.0 11/09/2021 Initial Release
1.1 11/15/2021 Updated acknowledgements.
1.2 11/17/2021 Updated affected products to include 8th Generation Intel® Core™ Processor Family

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