Skip to content
OpenAdvisories
High MSRC-CVE-2022-21836 1 CVE

Windows Certificate Spoofing Vulnerability

Published Jan 11, 2022 · Updated Jan 11, 2022

Summary

Impact: Spoofing. Microsoft rating: Important. Not known to be exploited, publicly disclosed before the fix — Exploitation Less Likely. Customer action: Required.

Details

What kind of security feature could be bypassed by successfully exploiting this vulnerability?
A successful attacker could bypass the WPBT binary verification by using a small number of compromised certificates. Microsoft has added those certificates to the Windows kernel driver block list, driver.stl. Certificates on the driver.stl will be blocked even if present in the Windows Platform Binary Table (WPBT).
In addition, Microsoft recommends customers use Windows Defender Application Control (WDAC) to limit what is allowed to run on their devices. WDAC policy is also enforced for binaries included in the WPBT and should mitigate this issue. We recommend customers implement a WDAC policy that is as restrictive as practical for their environment. You can find documentation on WDAC on https://docs.microsoft.com.

Security updates
10.0.17763.2452 — https://support.microsoft.com/help/5009557
10.0.18363.2037 — https://support.microsoft.com/help/5009545
10.0.19043.1466 — https://support.microsoft.com/help/5009543
10.0.20348.469 — https://support.microsoft.com/help/5009555
10.0.22000.434 — https://support.microsoft.com/help/5009566
10.0.10240.19177 — https://support.microsoft.com/help/5009585
10.0.14393.4886 — https://support.microsoft.com/help/5009546
6.1.7601.25829 — https://support.microsoft.com/help/5009610
6.1.7601.25829 — https://support.microsoft.com/help/5009621
6.3.9600.20246 — https://support.microsoft.com/help/5009624
6.3.9600.20246 — https://support.microsoft.com/help/5009595
6.0.6003.21349 — https://support.microsoft.com/help/5009627
6.0.6003.21349 — https://support.microsoft.com/help/5009601
6.2.9200.23584 — https://support.microsoft.com/help/5009586
6.2.9200.23584 — https://support.microsoft.com/help/5009619

Vulnerabilities 1

Revision history

  1. #1

    Information published.

References