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CVE-2021-33117: INTEL-SA-00586

Improper access control for some 3rd Generation Intel® Xeon® Scalable Processors before BIOS version MR7, may allow a local attacker to potentially enable information disclosure via local access.

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3rd Generation Intel® Xeon® Scalable Processors Advisory

**Summary: **

A potential security vulnerability in some 3rd Generation Intel® Xeon® Scalable Processors may allow information disclosure. Intel is releasing firmware updates to mitigate this potential vulnerability.

Vulnerability Details:

CVEID: CVE-2021-33117

Description: Improper access control for some 3rd Generation Intel® Xeon® Scalable Processors before BIOS version MR7, may allow a local attacker to potentially enable information disclosure via local access.

CVSS Base Score: 6.5 Medium

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

Affected Products:

Product Family

Processor

Vertical Segment

CPU ID

Platform ID

3rd Generation Intel® Xeon® Scalable Processors

06_6AH

Server

606AX

0x87

**Recommendations:
**

Intel recommends that users of affected 3rd Generation Intel® Xeon® Scalable Processors update to the latest version firmware provided by the system manufacturer that addresses these issues.

This CVE requires a Microcode Security Version Number (SVN) update. To address this vulnerability, an SGX TCB recovery is planned for Q2 2022. Refer to:

https://www.intel.com/content/www/us/en/security-center/technical-details/sgx-attestation-technical-details.html

for more information on the SGX TCB recovery process.

Acknowledgements:

This issue was found internally by Intel employees.

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

05/10/2022

Initial Release

1.1

05/11/2022

Updated recommendations

Legal Notices and Disclaimers

Intel provides these materials as-is, with no express or implied warranties.

All products, dates, and figures specified are preliminary based on current expectations, and are subject to change without notice.

Intel, processors, chipsets, and desktop boards may contain design defects or errors known as errata, which may cause the product to deviate from published specifications. Current characterized errata are available on request.

Intel technologies’ features and benefits depend on system configuration and may require enabled hardware, software or service activation. Performance varies depending on system configuration. No product or component can be absolutely secure. Check with your system manufacturer or retailer or learn more at https://intel.com.

Some results have been estimated or simulated using internal Intel analysis or architecture simulation or modeling, and provided to you for informational purposes. Any differences in your system hardware, software or configuration may affect your actual performance.

Intel and the Intel logo are trademarks of Intel Corporation in the United States and other countries.

*Other names and brands may be claimed as the property of others.
Copyright © Intel Corporation 2022

Report a Vulnerability

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Related news

Ubuntu Security Notice USN-5535-1

Ubuntu Security Notice 5535-1 - 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.

Ubuntu Security Notice USN-5486-1

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.

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