CVE-2024-38058: BitLocker Security Feature Bypass Vulnerability

Overview

Severity

Medium (CVSS 6.8)

CVSS Vector

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Category

Security Feature Bypass

Exploit Status

Not Exploited

Exploitation Likelihood

Less Likely

Patch Tuesday

2024-Jul

Released

2024-07-09

Last Updated

2024-08-13

EPSS Score

0.48% (percentile: 65.3%)

FAQ

Why was the fix for this vulnerability disabled and how can I apply protections to address this issue? When customers applied the fix for this vulnerability to their devices, we received feedback about firmware incompatibility issues that were causing BitLocker to go into recovery mode on some devices. As a result, with the release of the August 2024 security updates we are disabling this fix. Customers who want this protection can apply the mitigations described in KB5025885. What kind of security feature could be bypassed by successfully exploiting this vulnerability? A successful attacker could bypass the BitLocker Device Encryption feature on the system storage device. An attacker with physical access to the target could exploit this vulnerability to gain access to encrypted data.

Affected Products (29)

Windows

• Windows 10 Version 1809 for 32-bit Systems
• Windows 10 Version 1809 for x64-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 23H2 for ARM64-based Systems
• Windows 11 Version 23H2 for x64-based Systems
• Windows Server 2022, 23H2 Edition (Server Core installation)
• Windows 10 for 32-bit Systems
• Windows 10 for x64-based Systems
• Windows 10 Version 1607 for 32-bit Systems
• Windows 10 Version 1607 for x64-based Systems
• Windows Server 2016
• Windows Server 2016 (Server Core installation)

ESU

• 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 Server 2012
• Windows Server 2012 (Server Core installation)
• Windows Server 2012 R2
• Windows Server 2012 R2 (Server Core installation)

Security Updates (10)

• 5040430
• 5040437
• 5040431
• 5040427
• 5040442
• 5040438
• 5040448
• 5040434
• 5040485
• 5040456

Acknowledgments

Bill Demirkapi of Microsoft

Revision History

• 2024-07-09: Information published.
• 2024-08-13: Added an FAQ to explain that because of firmware incompatibility issues that were causing BitLocker to go into recovery mode on some devices, the fix for CVE-2024-38058 has been disabled with the release of the August 2024 security updates. Customers who want to be protected from the vulnerability can apply the mitigations described in KB5025885.