{"id":"UBUNTU-CVE-2012-2663","details":"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.","modified":"2026-04-22T09:12:49.442159Z","published":"2014-02-15T14:57:00Z","upstream":["CVE-2012-2663"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2012-2663"},{"type":"REPORT","url":"http://www.openwall.com/lists/oss-security/2012/05/30/2"},{"type":"REPORT","url":"http://www.spinics.net/lists/netfilter-devel/msg21248.html"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2012-2663"}],"affected":[{"package":{"name":"iptables","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/iptables@1.4.21-1ubuntu1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.18-1.1ubuntu1","1.4.20-2","1.4.20-2ubuntu1","1.4.21-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.4.21-1ubuntu1","binary_name":"iptables"},{"binary_name":"libxtables10","binary_version":"1.4.21-1ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2012/UBUNTU-CVE-2012-2663.json"}},{"package":{"name":"iptables","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/iptables@1.6.0-2ubuntu3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.21-2ubuntu2","1.6.0-2ubuntu3"],"ecosystem_specific":{"binaries":[{"binary_name":"iptables","binary_version":"1.6.0-2ubuntu3"},{"binary_name":"iptables-nftables-compat","binary_version":"1.6.0-2ubuntu3"},{"binary_name":"libxtables11","binary_version":"1.6.0-2ubuntu3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2012/UBUNTU-CVE-2012-2663.json"}},{"package":{"name":"iptables","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/iptables@1.6.1-2ubuntu2.1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.1-2ubuntu1","1.6.1-2ubuntu2","1.6.1-2ubuntu2.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.6.1-2ubuntu2.1","binary_name":"iptables"},{"binary_name":"iptables-nftables-compat","binary_version":"1.6.1-2ubuntu2.1"},{"binary_name":"libip4tc0","binary_version":"1.6.1-2ubuntu2.1"},{"binary_name":"libip6tc0","binary_version":"1.6.1-2ubuntu2.1"},{"binary_name":"libiptc0","binary_version":"1.6.1-2ubuntu2.1"},{"binary_name":"libxtables12","binary_version":"1.6.1-2ubuntu2.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2012/UBUNTU-CVE-2012-2663.json"}},{"package":{"name":"iptables","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/iptables@1.8.4-3ubuntu2.1?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.8.3-2ubuntu5","1.8.4-3ubuntu1","1.8.4-3ubuntu2","1.8.4-3ubuntu2.1"],"ecosystem_specific":{"binaries":[{"binary_name":"iptables","binary_version":"1.8.4-3ubuntu2.1"},{"binary_name":"libip4tc2","binary_version":"1.8.4-3ubuntu2.1"},{"binary_name":"libip6tc2","binary_version":"1.8.4-3ubuntu2.1"},{"binary_name":"libiptc0","binary_version":"1.8.4-3ubuntu2.1"},{"binary_name":"libxtables12","binary_version":"1.8.4-3ubuntu2.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2012/UBUNTU-CVE-2012-2663.json"}}],"schema_version":"1.7.5","severity":[{"type":"Ubuntu","score":"low"}]}