Operating System:

[Appliance]

Published:

09 September 2020

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3096
                            Intel BIOS Advisory
                             9 September 2020

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        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Intel BIOS firmware
Publisher:         Intel
Operating System:  Network Appliance
Impact/Access:     Denial of Service        -- Existing Account
                   Increased Privileges     -- Existing Account
                   Access Confidential Data -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2020-8672 CVE-2020-8671 CVE-2019-14558
                   CVE-2019-14557 CVE-2019-14556 

Reference:         ESB-2020.1558

Original Bulletin: 
   https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00356.html

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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

Summary:

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
potential vulnerabilities.

Vulnerability Details:

CVEID: CVE-2020-8672

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

CVEID: CVE-2019-14557

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

CVEID: CVE-2019-14558

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

CVEID: CVE-2020-8671

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

CVEID: CVE-2019-14556

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

Affected Products:

  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

Recommendations:

Intel recommends that users of above Intel products update to the latest BIOS
version provided by the system manufacturer that addresses these issues.

Acknowledgements:

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 History

Revision    Date      Description
1.0      09/08/2020 Initial Release

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