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
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High 7.8
Windows Certificate Spoofing Vulnerability
Windows Certificate Spoofing Vulnerability
Revision history
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#1
Information published.
References
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CVE-2022-21836 Windows Certificate Spoofing Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-21836
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss