Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2021.2012 Intel Processors Software Developer Guidance Advisory 9 June 2021 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Intel Processors Publisher: Intel Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Access Confidential Data -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2021-0089 CVE-2021-0086 Original Bulletin: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00516.html - --------------------------BEGIN INCLUDED TEXT-------------------- Intel ID: INTEL-SA-00516 Advisory Category: Hardware Impact of vulnerability : Information Disclosure Severity rating : MEDIUM Original release: 06/08/2021 Last revised: 06/08/2021 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(R) 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(R) 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: o Process isolation. o Use alternatives to NaN-boxing techniques (eg. Dedicated type tag). o 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: o Process isolation. o Place serializing operations between code gen and execution. o Place LFENCE-semantic operations between code gen and execution. o 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 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBYMA4CuNLKJtyKPYoAQiK8hAAndVXU5HiQZrbH/wENvYutRlCDZ/7AY6P cwmOIgaxyyPt5TRfOSkFUns9KW+94XBEabkxjPc6nnSO+JcQOMC8GMmDgauGU1EY V0LsoYgd2bDcC2g5oNyLa4zm6XayuFvWxjWcEqEsinPP7ESwqxsk4NQShLlEjRFu /M5fW3jUpE7zbf6UwGXzqUYHrxoHX1R+5xkJd46H4H3jTwlYhgUjxXn9CuWW0IKF BCLsJTbSwpc+SI2kAd+7DilnwnL1AuGWv4d3GvNZjDofv8x6Oeei/PtYoG0oPz27 8oL/uCauFmuamfh5+s4ef2OQwf7D2eqivv2ghcjT0gmuIF+5ovQPo2PxjaNAWDRa 0oAMcZBc3+DKrCDbRBNky2P2Yu0G04FRTctvbLe2DSgpeOZ1WOTomyh3ee7mPId5 R9XLfhs+wgiTZ8epZMHmvC59cN7w3RgUq8ZLM6pVbNiWMvHO/hQfTFHmfZUhyGr6 7t5qUEMAry+Sd4u3WQXlkPzCgnAkxFJaifV29mUySCe9g4CZEd2bq9bLYRexExwu WFD6mMaiZKD0C5ASCAv/YIuIcKUfCZlbp4wAtBJiMvML0nBeUEuJb2qd7BseuEFv fmObZlDFxjkSzPKmSdVj1GV4opk2kIibpWDCEz1xIn6nFMPWwQnpZP/yrKi2+jeV kQ1I7cCNva4= =vKvJ -----END PGP SIGNATURE-----