CVE-2024-21305: Hypervisor-Protected Code Integrity (HVCI) Security Feature Bypass Vulnerability

Overview

Severity
Medium (CVSS 4.4)
CVSS Vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C
Category
Security Feature Bypass
Exploit Status
Not Exploited
Exploitation Likelihood
Less Likely
Patch Tuesday
2024-Jan
Released
2024-01-09
EPSS Score
0.32% (percentile: 55.5%)

FAQ

According to the CVSS metric, privileges required is high (PR:H). What does that mean for this vulnerability? Successful exploitation of this vulnerability requires an attacker to compromise admin credentials on the device. 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 on some specific Microsoft Surface hardware computers that are still in support, 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 application at administrator level that exploits a signed driver to bypass code integrity protections in Windows. The following versions of Microsoft Surface computers are exploitable by this vulnerability: Hub 3 Pro 5 - not updated due to end of life Pro 7 - not updated due to end of life Laptop Studio Laptop Go 2 Pro 7+ Studio 2 + Laptop 4 (Intel) Pro 8 Hub 2S Hub 2S Book 3 Laptop 3 (Intel) Laptop Go Studio 2

Detection & Weaponization (1 sources)

Maturity: Exploit

  • GitHub PoC: 1 repositories

Affected Products (20)

Windows

  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 1809 for ARM64-based Systems
  • Windows Server 2019
  • Windows Server 2019 (Server Core installation)
  • Windows Server 2022
  • Windows Server 2022 (Server Core installation)
  • Windows 11 version 21H2 for x64-based Systems
  • Windows 11 version 21H2 for ARM64-based Systems
  • Windows 10 Version 21H2 for 32-bit Systems
  • Windows 10 Version 21H2 for ARM64-based Systems
  • Windows 10 Version 21H2 for x64-based Systems
  • Windows 11 Version 22H2 for ARM64-based Systems
  • Windows 11 Version 22H2 for x64-based Systems
  • Windows 10 Version 22H2 for x64-based Systems
  • Windows 10 Version 22H2 for ARM64-based Systems
  • Windows 10 Version 22H2 for 32-bit Systems
  • Windows 11 Version 23H2 for ARM64-based Systems
  • Windows 11 Version 23H2 for x64-based Systems
  • Windows Server 2022, 23H2 Edition (Server Core installation)

Security Updates (6)

Acknowledgments

<a href="https://twitter.com/standa_t">Satoshi Tanda</a> with <a href="https://tandasat.github.io/">System Programming Lab</a>

Revision History

  • 2024-01-09: Information published.