Vulnerability Database

308,820

Total vulnerabilities in the database

CVE-2012-2663

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.

  • Published: Feb 15, 2014
  • Updated: Nov 9, 2025
  • CVE: CVE-2012-2663
  • Severity: High
  • Exploit:

CVSS v2:

  • Severity: High
  • Score: 7.5
  • AV:N/AC:L/Au:N/C:P/I:P/A:P

No CWE or OWASP classifications available.

Software From Fixed in
netfilter / iptables - 1.4.21.x