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AUSCERT External Security Bulletin Redistribution
ESB-2021.3741
Intel Thunderbolt non-DCH Driver for Windows Advisory
10 November 2021
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AusCERT Security Bulletin Summary
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Product: Intel Thunderbolt non-DCH (Declarative Componentized Hardware) driver
Publisher: Intel
Operating System: Windows
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-8741
Original Bulletin:
https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00393.html
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Intel ID: INTEL-SA-00393
Advisory Category: Software
Impact of vulnerability : Escalation of Privilege
Severity rating : MEDIUM
Original release: 11/09/2021
Last revised: 11/09/2021
Summary:
A potential security vulnerability in the Intel Thunderbolt non-DCH
(Declarative Componentized Hardware) driver for Windows may allow escalation of
privilege. Intel is releasing software updates and prescriptive guidance to
mitigate this potential vulnerability.
Vulnerability Details:
CVEID: CVE-2020-8741
Description: Improper permissions in the installer for the Intel(R) Thunderbolt
(TM) non-DCH driver, all versions, for Windows may allow an authenticated user
to potentially enable escalation of privilege via local access.
CVSS Base Score: 6.7 Medium
CVSS Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Affected Products:
Intel Thunderbolt non-DCH Driver, all versions, for Windows.
Recommendations:
Intel has issued a Product Discontinuation notice for the Intel Thunderbolt
non-DCH driver for Windows. To retain support for existing devices, Intel
recommends that users of Intel Thunderbolt non-DCH driver for Windows update to
the latest version provided by the system manufacturer.
For affected Intel NUC Products, Intel recommends updating to the versions
below:
. Thunderbolt 3 Firmware Update Tool for NUC6i7KYK (version 38)
. Thunderbolt 3 Firmware Update Tool for NUC6i7KYK (version 27)
. Thunderbolt 3 Firmware Update Tool for NUC6i7KYK (version 46)
. Thunderbolt 3 Firmware Update Tool for NUC7i7BN and NUC7i5BN
. Thunderbolt 3 Firmware Update Tool for NUC8i7HNK, NUC8i7HVK
. Thunderbolt 3 Firmware Update Tool for Intel NUC 9 Extreme Laptop Kits
. Thunderbolt 3 Firmware Update Tool for NUC10ixFN
. Thunderbolt 3 Firmware Update Tool for the Intel NUC8ixBE and NUC7ixBN
. Thunderbolt 3 Firmware Update Tool for NUC8vPN
. Thunderbolt 3 Firmware Update Tool for NUC9QN
. Thunderbolt 3 Driver for Windows Server 2016* for NUC6i7KYK, NUC8i7HNK,
NUC8i7HVK
. Thunderbolt 3 Legacy Driver for Windows 10 for Intel NUC
. Thunderbolt 3 DCH Driver for Intel NUC 9 Extreme Laptop Kits
. Thunderbolt 3 DCH Driver for NUC11TN
. Thunderbolt 3 and 4 DCH Driver for Windows 10 for Intel NUC
Acknowledgements:
Intel would like to thank Haoran Qin & Zhiniang Peng (@edwardzpeng) for
reporting this issue.
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 11/09/2021 Initial Release
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