Vulnerability identifier: #VU46742

Vulnerability risk: Medium

CVSSv3: 6.3 [CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-24718

CWE-ID: CWE-264

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 escalate privileges on the system.

The vulnerability exists in bhyve(8) hypervisor due to application does not properly impose security restrictions. A remote root user on the host within jailed environment can run a specially crafted program to execute arbitrary code on systems that rely on bhyve(8) in jail for security domain separation.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 11.0, 11.1, 11.2, 11.3, 11.4, 12.0, 12.1, 12.2

CPE

• cpe:/o:freebsd_foundation:freebsd:12.2:
• cpe:/o:freebsd_foundation:freebsd:12.1:
• cpe:/o:freebsd_foundation:freebsd:12.0:
• cpe:/o:freebsd_foundation:freebsd:11.4:
• cpe:/o:freebsd_foundation:freebsd:11.3:
• cpe:/o:freebsd_foundation:freebsd:11.2:
• cpe:/o:freebsd_foundation:freebsd:11.1:
• cpe:/o:freebsd_foundation:freebsd:11.0:

External links
https://www.freebsd.org/security/advisories/FreeBSD-SA-20:28.bhyve_vmcs.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.