MNBSD-2023-17 pf incorrectly handles multiple IPv6 fragment headers

IPv6 fragments may bypass firewall rules written on the assumption all fragments have been reassembled and, as a result, be forwarded or processed by the host.

Aliases: FreeBSD-SA-23:10.pf,CVE-2023-4809

Modified: 2023-12-28T00:00:00.000Z
Published: 2023-12-28T00:00:00.000Z

References

https://nvd.nist.gov/vuln/detail/CVE-2023-4809
https://www.freebsd.org/security/advisories/FreeBSD-SA-23:10.pf.asc