#VU99514 Out-of-bounds read in FreeBSD - CVE-2024-41721

Vulnerability identifier: #VU99514

Vulnerability risk: Medium

CVSSv4.0: 4.8 [CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-41721

CWE-ID: CWE-125

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FreeBSD
Operating systems & Components / Operating system

Vendor: FreeBSD Foundation

Description

The vulnerability allows a malicious guest to compromise the affected system.

The vulnerability exists due to a boundary condition in bhyve(8) when emulating device on a USB controller via XHCI emulation. A malicious guest can trigger an out-of-bounds read and crash the hypervisor or execute arbitrary code.

Note that bhyve runs in a Capsicum sandbox, so malicious code is constrained by the capabilities available to the bhyve process.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 13.3 - 14.1

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External links
https://security.freebsd.org/advisories/FreeBSD-SA-24:15.bhyve.asc

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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.