Vulnerability identifier: #VU46228

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-824

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
FreeBSD
Operating systems & Components / Operating system

Vendor: FreeBSD Foundation

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an error in internal interface used by getfsstat(2) compatibility system. A local unprivileged user can run a program that calls getfsstat(2) with an invalid argument, which causes getfsstat(2) to free an uninitialized pointer and results in kernel panic.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FreeBSD: 11.0 - 11.4

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External links
http://www.freebsd.org/security/advisories/FreeBSD-EN-20:18.getfsstat.asc

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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