#VU66475 Buffer overflow in FreeBSD - CVE-2022-23092

Vulnerability identifier: #VU66475

Vulnerability risk: Medium

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:Green]

CVE-ID: CVE-2022-23092

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
FreeBSD
Operating systems & Components / Operating system

Vendor: FreeBSD Foundation

Description

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in lib9p implementation used by bhyve(8). A remote user on the guest OS can send a specially crafted message to trigger memory corruption and execute arbitrary code on the host OS.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 13.0 RC4 - 13.1

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External links
https://www.freebsd.org/security/advisories/FreeBSD-SA-22:12.lib9p.asc

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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.