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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.3950 Intel BIOS Platform Sample Code Advisory 11 November 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Intel BIOS Platform Sample Code Publisher: Intel Operating System: Windows UNIX variants (UNIX, Linux, OSX) Impact/Access: Increased Privileges -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2020-8764 CVE-2020-8740 CVE-2020-8739 CVE-2020-8738 Original Bulletin: https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00390.html - --------------------------BEGIN INCLUDED TEXT-------------------- Intel BIOS Platform Sample Code Advisory Intel ID: INTEL-SA-00390 Advisory Category: Firmware Impact of vulnerability : Escalation of Privilege Severity rating : HIGH Original release: 11/10/2020 Last revised: 11/10/2020 Summary: Potential security vulnerabilities in Intel BIOS platform sample code for some Intel Processors may allow escalation of privilege. Intel is releasing BIOS platform sample code updates to mitigate these potential vulnerabilities. Vulnerability Details: CVEID: CVE-2020-8764 Description: Improper access control in BIOS firmware for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access. CVSS Base Score: 8.2 High CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H CVEID: CVE-2020-8738 Description: Improper conditions check in Intel BIOS platform sample code for some Intel(R) Processors before may allow a privileged user to potentially enable escalation of privilege via local access. CVSS Base Score: 7.5 High CVSS Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H CVEID: CVE-2020-8740 Description: Out of bounds write in Intel BIOS platform sample code for some Intel(R) Processors may allow a privileged user to potentially enable escalation of privilege via local access. CVSS Base Score: 6.7 Medium CVSS Vector: CVSS:3.0/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:H/A:L CVEID: CVE-2020-8739 Description: Use of potentially dangerous function in Intel BIOS platform sample code for some Intel(R) Processors may allow an authenticated user to potentially enable escalation of privilege via local access. CVSS Base Score: 4.6 Medium CVSS Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:L Affected Products: 2nd Generation Intel Xeon Scalable Processors, Intel Core X-series Processors, Intel Xeon Processor W Family and Intel Xeon Scalable Processors o CVE-2020-8738 o CVE-2020-8739 o CVE-2020-8740 o CVE-2020-8764 Intel Xeon Processor D Family, Intel Xeon Processor E7 v4 Family and Intel Xeon Processor E5 v3 Family, Intel Xeon Processor E5 v4 Family o CVE-2020-8738 o CVE-2020-8740 o CVE-2020-8764 Intel Xeon Processor D Family o CVE-2020-8739 o CVE-2020-8740 o CVE-2020-8764 Intel Xeon Processor E7 v3 Family o CVE2020-8764 Intel Atom Processor C3XXX o CVE-2020-8738 Intel recommends that users of the affected products update to the latest BIOS firmware provided by the system manufacturer that addresses these issues. Acknowledgements: Intel would like to thank Dmitry Frolov (CVE-2020-8738) for reporting this issue. The following issues were found internally by Intel, CVE-2020-8739 and CVE-2020-8764. Intel would like to thank Brent Holtsclaw for CVE-2020-8740. 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 11/10/2020 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. 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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 iQIVAwUBX6sckeNLKJtyKPYoAQhEkA/7BWeJNeicHdVl/ZTy7I2g8i+xUI12WMdR L9Y4KE+13RKQkL2oBx/8dgkgdCSF5BkBDNkDyrolBqyl/4YWty5VJ4uByG/yM4ox uVd1t8mZKmPgyyZ7k2pGbocC25zQY9ASszozyOuESV2ozrwduhZ/IRYP7egOkJZ4 t9qgHX0P0sakb9ddtWx7q6wlZEMEIkofyYK9e0WGhIPHoxW7Yhnmn7wl+MNfn2mo Cg3ZKNeNd0qR0mcctj5KZSnwnMnV711YVNK1habIbVfRwSMnL4EwBJrEOp+rTEGA vWdVQ/l6QLQf0JrbxgXOuCDnbsJ4Gs5BQh7PXLVRn302RX/rCgydFNFyrMZ09e+U 0G11+HTd4PgOalxGYrv7M1BuSrRyqETGWPSVvUbTpND0QQFz1t5bbr0fLpHmNnhn f1OCkYZBMrGRyN9Sno0zt9zxWlHbnuAoDd2Cr+aZFmIf95uXdYq1zfXKS1hwpBKy Dkd9uH3UhifkxmfWIpdNCa+XFzoeSJ/3KI6XyZa/cFoU8dQocUPsRR8WkQDXUVou Evw+bUYm9tLLIx7sRJME2jQTmu+oTtDyjHIHByHGfxF3sXVD6E8Q0Xurcq/DoHf2 teXMZyYShdKvdeVCwssAiNwZ+elZks6xu3a2d9sVmjBGvlTWfu6rGu54popwUvRu FjDMwg+0Pz8= =EehE -----END PGP SIGNATURE-----