Vulnerability identifier: #VU17378
Vulnerability risk: Low
CVSSv3.1: 7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-120
Exploitation vector: Local
Exploit availability: Yes
Vulnerable software:
FreeBSD
Operating systems & Components /
Operating system
Vendor: FreeBSD Foundation
Description
The vulnerability allows a local attacker to escalate privileges on the system.
The vulnerability exists in /dev/fd/due to the application attempts to handle the case where the receiving process does not provide a sufficiently large buffer for an incoming control message containing rights. A local attacker can cause the reference counter to wrap around and free the file structure and gain root privileges.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
FreeBSD: 12.0
External links
http://www.freebsd.org/security/advisories/FreeBSD-SA-19:02.fd.asc
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. However, proof of concept for this vulnerability is available.