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             AUSCERT External Security Bulletin Redistribution

                2021.1 IPU - Intel Atom Processor Advisory
                                9 June 2021


        AusCERT Security Bulletin Summary

Product:           Intel Atom Processor
Publisher:         Intel
Operating System:  Windows
                   UNIX variants (UNIX, Linux, OSX)
Impact/Access:     Access Confidential Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-24513  

Original Bulletin: 

- --------------------------BEGIN INCLUDED TEXT--------------------

Intel ID:                 INTEL-SA-00465
Advisory Category:        Firmware
Impact of vulnerability : Information Disclosure
Severity rating :         MEDIUM
Original release:         06/08/2021
Last revised:             06/08/2021


A potential security vulnerability in some Intel Atom Processors may allow
information disclosure. Intel is releasing firmware updates to mitigate this
potential vulnerability.

Vulnerability Details:

CVEID: CVE-2020-24513

Description: Domain-bypass transient execution vulnerability in some Intel Atom
(R) Processors may allow an authenticated user to potentially enable
information disclosure via local access.

CVSS Base Score: 5.6 Medium


Affected Products:

A list of impacted products can be found here .


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

To address this issue, an SGX TCB recovery is planned for Q2 2021. Customers
will require the software update to get successful attestation responses. For
customers using the Intel Attestation Service (IAS), the IAS Development
Environment (DEV) will enforce the software updates beginning June 15, 2021 and
the IAS Production Environment (LIV) will enforce the updates beginning July
13, 2021.

For customers that are not using IAS, but instead are constructing their own
attestation infrastructure using the Intel SGX Provisioning Certificate Service
(PCS), updated Endorsements/Reference Values (i.e., PCK Certificates and
verification collateral) will be available June 8, 2021. These customers decide
when to enforce the software update, as part of their Appraisal Policies.

Refer to Intel SGX Attestation Technical Details for more information on the
SGX TCB recovery process.

Further TCB Recovery Guidance for developers is available.


The following issue was found internally by Intel.

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      06/08/2021 Initial Release

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