CVE-2024-32668: bhyve(8) privileged guest escape via USB controller
First published: Thu Sep 05 2024(Updated: )
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.
Credit: secteam@freebsd.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| FreeBSD Kernel | >=13.0<13.3 | |
| FreeBSD Kernel | =13.3 | |
| FreeBSD Kernel | =13.3-p1 | |
| FreeBSD Kernel | =13.3-p2 | |
| FreeBSD Kernel | =13.3-p3 | |
| FreeBSD Kernel | =13.3-p4 | |
| FreeBSD Kernel | =13.3-p5 | |
| FreeBSD Kernel | =13.4-beta3 | |
| FreeBSD Kernel | =14.0 | |
| FreeBSD Kernel | =14.0-beta5 | |
| FreeBSD Kernel | =14.0-p1 | |
| FreeBSD Kernel | =14.0-p2 | |
| FreeBSD Kernel | =14.0-p3 | |
| FreeBSD Kernel | =14.0-p4 | |
| FreeBSD Kernel | =14.0-p5 | |
| FreeBSD Kernel | =14.0-p6 | |
| FreeBSD Kernel | =14.0-p7 | |
| FreeBSD Kernel | =14.0-p8 | |
| FreeBSD Kernel | =14.0-p9 | |
| FreeBSD Kernel | =14.0-rc3 | |
| FreeBSD Kernel | =14.0-rc4-p1 | |
| FreeBSD Kernel | =14.1 | |
| FreeBSD Kernel | =14.1-p1 | |
| FreeBSD Kernel | =14.1-p2 | |
| FreeBSD Kernel | =14.1-p3 |
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Frequently Asked Questions
What is the severity of CVE-2024-32668?
The severity of CVE-2024-32668 is critical as it allows for code execution on the host via an out-of-bounds write.
How do I fix CVE-2024-32668?
To fix CVE-2024-32668, it is recommended to apply the latest security patches provided by FreeBSD.
Which software versions are affected by CVE-2024-32668?
CVE-2024-32668 affects FreeBSD versions from 13.0 to 14.1, including certain point releases and betas.
Who can exploit CVE-2024-32668?
A privileged software running in a guest VM can exploit CVE-2024-32668 to execute code on the host.
What is the attack vector for CVE-2024-32668?
The attack vector for CVE-2024-32668 involves insufficient boundary validation in the USB code.
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- version/freebsd kernel/13.0
- version/freebsd kernel/13.3
- version/freebsd kernel/13.3-p1
- version/freebsd kernel/13.3-p2
- version/freebsd kernel/13.3-p3
- version/freebsd kernel/13.3-p4
- version/freebsd kernel/13.3-p5
- version/freebsd kernel/13.4-beta3
- version/freebsd kernel/14.0
- version/freebsd kernel/14.0-beta5
- version/freebsd kernel/14.0-p1
- version/freebsd kernel/14.0-p2
- version/freebsd kernel/14.0-p3
- version/freebsd kernel/14.0-p4
- version/freebsd kernel/14.0-p5
- version/freebsd kernel/14.0-p6
- version/freebsd kernel/14.0-p7
- version/freebsd kernel/14.0-p8
- version/freebsd kernel/14.0-p9
- version/freebsd kernel/14.0-rc3
- version/freebsd kernel/14.0-rc4-p1
- version/freebsd kernel/14.1
- version/freebsd kernel/14.1-p1
- version/freebsd kernel/14.1-p2
- version/freebsd kernel/14.1-p3