Headline
CVE-2020-8738: INTEL-SA-00390
Improper conditions check in Intel BIOS platform sample code for some Intel® Processors before may allow a privileged user to potentially enable escalation of privilege via local access.
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Intel BIOS Platform Sample Code Advisory
**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® 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® 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® 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® 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
- CVE-2020-8738
- CVE-2020-8739
- CVE-2020-8740
- 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
- CVE-2020-8738
- CVE-2020-8740
- CVE-2020-8764
Intel® Xeon® Processor D Family
- CVE-2020-8739
- CVE-2020-8740
- CVE-2020-8764
Intel® Xeon® Processor E7 v3 Family
- CVE2020-8764
Intel® Atom® Processor C3XXX
- 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
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