Vulnerability identifier: #VU20024

Vulnerability risk: Medium

CVSSv3.1: 7 [CVSS:3.1/AV:A/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-5609

CWE-ID: CWE-787

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
FreeBSD
Operating systems & Components / Operating system

Vendor: FreeBSD Foundation

Description

The vulnerability allows a remote authenticated user to compromise vulnerable system.

The vulnerability exists due to a boundary error within bhyve(8) hypervisor when processing TCP packets sent via the e1000 network adapters. A remote user with access to guest operating system can send specially crafted TCP packets, trigger out-of-bounds write and execute arbitrary code on the host system.

Mitigation

Vulnerable software versions

FreeBSD: 11.2 - 12.0

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External links
http://www.freebsd.org/security/advisories/FreeBSD-SA-19:21.bhyve.asc
http://www.zerodayinitiative.com/advisories/ZDI-22-949/

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

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