#VU30357 Input validation error in FreeBSD - CVE-2015-2923
Published: February 20, 2020 / Updated: July 17, 2020
Vulnerability identifier: #VU30357
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2015-2923
CWE-ID: CWE-20
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vulnerable software:
FreeBSD
FreeBSD
Software vendor:
FreeBSD Foundation
FreeBSD Foundation
Description
The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.
The Neighbor Discovery (ND) protocol implementation in the IPv6 stack in FreeBSD through 10.1 allows remote attackers to reconfigure a hop-limit setting via a small hop_limit value in a Router Advertisement (RA) message.
Remediation
Install update from vendor's website.
External links
- http://openwall.com/lists/oss-security/2015/04/04/2
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6fd99094de2b83d1d4c8457f2c83483b2828e75a
- https://lists.freebsd.org/pipermail/freebsd-net/2015-April/041934.html
- https://www.freebsd.org/security/advisories/FreeBSD-SA-15:09.ipv6.asc