extensions/libxt_tcp.c in iptables through 1.4.21 does not match TCP SYN+FIN packets in --syn rules, which might allow remote attackers to bypass intended firewall restrictions via crafted packets. NOTE: the CVE-2012-6638 fix makes this issue less relevant.
No PoCs from references.
- https://github.com/CodingSimia/jenkins-shiftleft
- https://github.com/Live-Hack-CVE/CVE-2012-6638