Remote authenticated code execution in FreeBSD bhyve TPM device passthrough

1) Buffer overflow

EUVDB-ID: #VU99542

Risk: High

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2024-41928

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a malicious guest to execute arbitrary code on the hypervisor.

The vulnerability exists due to a boundary error within the TPM device passthrough implementation in bhyve(8). A malicious guest can trigger memory corruption and execute arbitrary code on the hypervisor.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 14.0 - 14.1

CPE2.3

• cpe:2.3:o:freebsd_foundation:freebsd:14.0:*:*:*:*:*:*:*
• cpe:2.3:o:freebsd_foundation:freebsd:14.1:*:*:*:*:*:*:*

External links

https://security.freebsd.org/advisories/FreeBSD-SA-24:10.bhyve.asc

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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