Remote authenticated code execution in FreeBSD bhyve

1) Out-of-bounds write

EUVDB-ID: #VU99535

Risk: High

CVSSv4.0: 6.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-32668

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a malicious guest to compromise the hypervisor.

The vulnerability exists due to a boundary error in bhyve(8) when emulating a USB controller. A malicious guest can trigger an out-of-bounds write and execute arbitrary code on the hypervisor as root.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 13.3 - 14.1

CPE2.3

• cpe:2.3:o:freebsd_foundation:freebsd:13.3:*:*:*:*:*:*:*
• cpe:2.3:o:freebsd_foundation:freebsd:13.4:*:*:*:*:*:*:*
• cpe:2.3:o:freebsd_foundation:freebsd:14.0:*:*:*:*:*:*:*

External links

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

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.