Summary
Impact: Security Feature Bypass. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What kind of security feature could be bypassed by successfully exploiting this vulnerability?
A hypervisor-protected code integrity (HVCI) security feature bypass vulnerability could exist when Windows incorrectly allows certain kernel-mode pages to be marked as Read, Write, Execute (RWX) even with HVCI enabled. To exploit this vulnerability an attacker could run a specially crafted script at administrator level that exploits a signed driver to bypass code integrity protections in Windows.
Security updates
10.0.20348.2340 — https://support.microsoft.com/help/5035857
10.0.20348.2333 — https://support.microsoft.com/help/5035959
10.0.22000.2836 — https://support.microsoft.com/help/5035854
10.0.19044.4170 — https://support.microsoft.com/help/5035845
10.0.22621.3296 — https://support.microsoft.com/help/5035853
10.0.25398.763 — https://support.microsoft.com/help/5035856
Vulnerabilities 1
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High 7.8
Hypervisor-Protected Code Integrity (HVCI) Security Feature Bypass Vulnerability
Hypervisor-Protected Code Integrity (HVCI) Security Feature Bypass Vulnerability
Revision history
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#1
Information published.
References
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CVE-2024-21431 Hypervisor-Protected Code Integrity (HVCI) Security Feature Bypass Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2024-21431
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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