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THREATINT
PUBLISHED

CVE-2024-32668

bhyve(8) privileged guest escape via USB controller



Assignerfreebsd
Reserved2024-08-27
Published2024-09-05
Updated2024-09-05

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.

Problem types

CWE-193: Off-by-one Error

CWE-787 Out-of-bounds Write

Product status

Default status
0x4002fdaac0

14.1-RELEASE before p4
affected

14.0-RELEASE before p10
affected

13.3-RELEASE before p6
affected

Credits

Synacktiv 0x4002fdab60

The FreeBSD Foundation 0x4002fdab70

The Alpha-Omega Project 0x4002fdab80

References

https://security.freebsd.org/advisories/FreeBSD-SA-24:12.bhyve.asc vendor-advisory

cve.org CVE-2024-32668

nvd.nist.gov CVE-2024-32668

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