CVE-2012-2663

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2014-02-15 · updated 2026-06-16

Description

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.

Affected products

Netfilter Iptables: through 1.4.21

References

http://www.spinics.net/lists/netfilter-devel/msg21248.html
https://bugzilla.redhat.com/show_bug.cgi?id=826702
http://www.spinics.net/lists/netfilter-devel/msg21248.html
https://bugzilla.redhat.com/show_bug.cgi?id=826702

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