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CVE-2024-32668— bhyve(8) privileged guest escape via USB controller

Quick assessment

Affected
FreeBSD FreeBSD
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

FreeBSD是FreeBSD基金会的一套类Unix操作系统。 FreeBSD 存在缓冲区错误漏洞，该漏洞源于 USB 代码中的边界验证不足可能会导致越界写入。

AI Predicted 8.6 Difficulty: Moderate EPSS 0.21% · P11

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2024-32668

Vulnerability Information
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Vulnerability Title
bhyve(8) privileged guest escape via USB controller
Source: CVE Program / CVE List V5
Vulnerability Description
An insufficient boundary validation in the USB code could lead to an out-of-bounds write on the heap, with data controlled by the caller. A malicious, privileged software running in a guest VM can exploit the vulnerability to achieve code execution on the host in the bhyve userspace process, which typically runs as root. Note that bhyve runs in a Capsicum sandbox, so malicious code is constrained by the capabilities available to the bhyve process.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
Off-by-one错误
Source: CVE Program / CVE List V5
Vulnerability Title
FreeBSD 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
FreeBSD是FreeBSD基金会的一套类Unix操作系统。 FreeBSD 存在缓冲区错误漏洞，该漏洞源于 USB 代码中的边界验证不足可能会导致越界写入。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
FreeBSD FreeBSD 14.1-RELEASE ~ p4 -

II. Public POCs for CVE-2024-32668

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III. Intelligence Information for CVE-2024-32668

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Vendor Advisories for CVE-2024-32668 (1)

Same Patch Batch · FreeBSD · 2024-09-05 · 9 CVEs total

CVE-2024-43102 umtx Kernel panic or Use-After-Free
CVE-2024-45063 Multiple issues in ctl(4) CAM Target Layer
CVE-2024-43110 Multiple issues in ctl(4) CAM Target Layer
CVE-2024-42416 Multiple issues in ctl(4) CAM Target Layer
CVE-2024-8178 Multiple issues in ctl(4) CAM Target Layer
CVE-2024-41928 bhyve(8) privileged guest escape via TPM device passthrough
CVE-2024-45288 Multiple vulnerabilities in libnv
CVE-2024-45287 Multiple vulnerabilities in libnv

IV. Related Vulnerabilities

Same product: FreeBSD
Same vendor: FreeBSD
Same weakness: CWE-193

V. Comments for CVE-2024-32668

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