Intel Processors: CVSS (Max): 3.2

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2022.2325
                  Intel SGX Linux Kernel Drivers Advisory
                                12 May 2022

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        AusCERT Security Bulletin Summary
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Product:           Intel Processors
Publisher:         Intel
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Resolution:        Patch/Upgrade
CVE Names:         CVE-2021-33135  

Original Bulletin: 
   https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00603.html

Comment: CVSS (Max):  3.2 CVE-2021-33135 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L)
         CVSS Source: Intel
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L

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Intel ID:                 INTEL-SA-00603
Advisory Category:        Software
Impact of vulnerability : Denial of Service
Severity rating :         LOW
Original release:         05/10/2022
Last revised:             05/10/2022


Summary:

A potential security vulnerability in Intel SGX Linux kernel drivers may allow
denial of service. Intel is working with the Linux kernel maintainers to create
a mitigation.

Vulnerability Details:

CVEID: CVE-2021-33135

Description: Uncontrolled resource consumption in the Linux kernel drivers for
Intel SGX may allow an authenticated user to potentially enable denial of
service via local access.

CVSS Base Score: 3.2 Low

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

Affected Products:

Intel SGX Linux kernel driver from Intel version 2.14 and before.

Linux kernel driver for Intel SGX from upstream/kernel.org.

Recommendations:

Intel SGX Linux kernel driver mitigation available for download at:

https://github.com/intel/SGXDataCenterAttestationPrimitives/tree/master/driver/
linux

Linux community mitigation available for download at kernel.org.

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

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