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AUSCERT External Security Bulletin Redistribution
ESB-2022.2327.4
3rd Generation Intel Xeon Scalable Processors Advisory
11 November 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Intel Processors
Publisher: Intel
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Resolution: Patch/Upgrade
CVE Names: CVE-2021-33117
Original Bulletin:
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00586.html
Revision History: November 11 2022: Vendor Update
June 14 2022: Updated recommendations
May 12 2022: Vendor updated recommendations
May 12 2022: Initial Release
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Intel ID: INTEL-SA-00586
Advisory Category: Firmware
Impact of vulnerability : Information Disclosure
Severity rating : MEDIUM
Original release: 05/10/2022
Last revised: 10/19/2022
Summary:
A potential security vulnerability in some 3 ^ rd 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(R) Xeon(R)
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 |CPU ID |Platform ID |
| | |Segment | | |
+-----------------------------------------+----------+---------------+-------------+------------+
|3 ^rd Generation Intel Xeon Scalable |06_6AH |Server |606AX |0x87 |
|Processors | | | | |
+-----------------------------------------+----------+---------------+-------------+------------+
Recommendations:
Intel recommends updating affected 3 ^ rd Generation Intel Xeon Scalable
Processors to BIOS version MR7 or later. Intel recommends the users to enable
the technologies that are used for BIOS to detect early boot code unauthorized
modification.
Alternatively, Intel recommends following the steps to update the microcode
patch located in platform flash designated by firmware interface table (FIT)
entry type1. Details on the firmware interface table layout and types can be
found at:
https://software.intel.com/content/dam/develop/external/us/en/documents/
firmware-interface-table-bios-specification-r1p2p1.pdf
Intel is releasing microcode updates, which are available at this GitHub*
repository link:
https://github.com/otcshare/Intel-Generic-Microcode/blob/main/NDA/repository/
server/production/m_87_606a6_0d000331.inc
This CVE requires a Microcode Security Version Number (SVN) update. To address
this issue, an Intel SGX TCB Recovery is planned. Details can be found here .
Refer to Intel SGX Attestation Technical Details for more information on the
Intel SGX TCB recovery process.
Further TCB Recovery Guidance for developers is available. .
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
1.2 06/13/2022 Updated recommendations
1.3 06/27/2022 Updated recommendations
1.4 10/19/2022 Updated SGX TCB Recovery plan Link
- --------------------------END INCLUDED TEXT--------------------
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