Vulnerability identifier: #VU29604
Vulnerability risk: Low
CVSSv3.1: 8.2 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-416
Exploitation vector: Local
Exploit availability: Yes
Vulnerable software:
FreeBSD
Operating systems & Components /
Operating system
Vendor: FreeBSD Foundation
Description
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition followed by a use-after-free error when processing IPv6 header options set by the IPV6_2292PKTOPTIONS socket option. A local user can set specially crafted IPv6 header options, trigger memory corruption and execute arbitrary code on the system with elevated privileges.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
FreeBSD: 11.0 - 12.1
External links
http://www.freebsd.org/security/advisories/FreeBSD-SA-20:20.ipv6.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, a fully functional exploit for this vulnerability is available.