Headline

CVE-2021-0089: INTEL-SA-00516

Observable response discrepancy in some Intel® Processors may allow an authorized user to potentially enable information disclosure via local access.

3 years ago

CVE

Open in Source

#vulnerability #web #java #intel #auth #chrome #firefox

Select Your Region

The browser version you are using is not recommended for this site.
Please consider upgrading to the latest version of your browser by clicking one of the following links.

Safari
Chrome
Edge
Firefox

Intel® Processors Software Developer Guidance Advisory

**Summary: **

Potential security vulnerabilities in some Intel® Processors may allow information disclosure. Intel is releasing updated software developer prescriptive guidance to address these potential vulnerabilities.

Vulnerability Details:

CVEID: CVE-2021-0086

Description: Observable response discrepancy in floating-point operations for some Intel® Processors may allow an authorized user 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

CVEID: CVE-2021-0089

Description: Observable response discrepancy in some Intel® Processors may allow an authorized user 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:

All Intel® Processor families.

Recommendations:

For CVE-2021-0086 Intel recommends that affected software including web browser JavaScript engine that runs on Intel® Processors follow one of the below guidelines:

• Process isolation.

• Use alternatives to NaN-boxing techniques (eg. Dedicated type tag).

• Constraining FP results before potential type-confused usage.

Additional technical details can be found here.

For CVE-2021-0089 Intel recommends that affected software that runs on Intel® Processors follow one of the below guidelines:

• Process isolation.

• Place serializing operations between code gen and execution.

• Place LFENCE-semantic operations between code gen and execution.

• Options include LFENCE, SYSCALL/SYSRET

Additional technical details can be found here.

Acknowledgements:

Intel would like to thank Enrico Barberis, Hany Ragab, Herbert Bos, and Cristiano Giuffrida from the VUSec group at VU Amsterdam 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

06/08/2021

Initial Release

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

If you have information about a security issue or vulnerability with an Intel branded product or technology, please send an e-mail to [email protected]. Encrypt sensitive information using our PGP public key.

Please provide as much information as possible, including:

The products and versions affected
Detailed description of the vulnerability
Information on known exploits

A member of the Intel Product Security Team will review your e-mail and contact you to collaborate on resolving the issue. For more information on how Intel works to resolve security issues, see: