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AUSCERT External Security Bulletin Redistribution
Intel BIOS Advisory
9 September 2020
AusCERT Security Bulletin Summary
Product: Intel BIOS firmware
Operating System: Network Appliance
Impact/Access: Denial of Service -- Existing Account
Increased Privileges -- Existing Account
Access Confidential Data -- Existing Account
CVE Names: CVE-2020-8672 CVE-2020-8671 CVE-2019-14558
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Intel ID: INTEL-SA-00356
Advisory Category: Firmware
Impact of Escalation of Privilege, Denial of Service, Information
vulnerability : Disclosure
Severity rating : MEDIUM
Original release: 09/08/2020
Last revised: 09/08/2020
Potential security vulnerabilities in BIOS firmware for multiple Intel
Platforms may allow escalation of privilege, denial of service and/or
information disclosure. Intel is releasing BIOS updates to mitigate these
Description: Out of bound read in BIOS firmware for 8th, 9 ^ th Generation
Intel(R) Core(TM), Intel(R) Celeron(R) Processor 4000 Series Processors may
allow an unauthenticated user to potentially enable elevation of privilege or
denial of service via local access.
CVSS base Score: 5.1 Medium
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Description: Buffer overflow in BIOS firmware for 8th, 9 ^ th , 10th Generation
Intel(R) Core(TM), Intel(R) Celeron(R) Processor 4000 & 5000 Series Processors
may allow an authenticated user to potentially enable elevation of privilege or
denial of service via adjacent access.
CVSS base Score: 4.6 Medium
CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L
Description: Insufficient control flow management in BIOS firmware for 8th, 9 ^
th , 10th Generation Intel(R) Core(TM), Intel(R) Celeron(R) Processor 4000 &
5000 Series Processors may allow an authenticated user to potentially enable
denial of service via adjacent access.
CVSS base Score: 3.0 Low
CVSS Vector: CVSS:3.1/AV:A/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
Description: Insufficient control flow management in BIOS firmware 8th, 9 ^ th
Generation Intel(R) Core(TM) Processors and Intel(R) Celeron(R) Processor 4000
Series may allow an authenticated user to potentially enable information
disclosure via local access.
CVSS base Score: 5.0 Medium
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Description: Improper initialization in BIOS firmware for 8th, 9th,10th
Generation Intel(R) Core(TM), Intel(R) Celeron(R) Processor 4000 & 5000 Series
Processors may allow a privileged user to potentially enable denial of service
via local access.
CVSS base Score: 2.0 Low
CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:N/I:N/A:L
o 8th Generation Intel Core Processor
o 9th Generation Intel Core Processor
o 10th Generation Intel Core i7 Processor
o Intel Celeron Processor 5000 Series
o Intel Celeron Processor 4000 Series
Intel recommends that users of above Intel products update to the latest BIOS
version provided by the system manufacturer that addresses these issues.
These issues were 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 Date Description
1.0 09/08/2020 Initial Release
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