{"id":"CVE-2015-6496","aliases":["DEBIAN-CVE-2015-6496","DLA-295-1","DSA-3341-1","EUVD-2015-6437","GHSA-v3f5-57x9-2pvx","MGASA-2015-0363","SUSE-SU-2015:1545-1","SUSE-SU-2015:1683-1","openSUSE-SU-2024:10430-1"],"status":"published","title":"conntrackd in conntrack-tools 1.4.2 and earlier does not ensure that the optional kernel modules...","description":"conntrackd in conntrack-tools 1.4.2 and earlier does not ensure that the optional kernel modules are loaded before using them, which allows remote attackers to cause a denial of service (crash) via a (1) DCCP, (2) SCTP, or (3) ICMPv6 packet.","severity":{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03202,"percentile":0.88221,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-17"],"published":"2015-08-19T00:00:00Z","modified":"2026-06-17T00:30:57Z","fixes":[{"ecosystem":"Debian:6.0","package":"conntrack","fixed_in":["1:0.9.14-2+deb6u1"],"sources":["osv"]},{"ecosystem":"Debian:7","package":"conntrack","fixed_in":["1:1.2.1-1+deb7u1"],"sources":["osv"]},{"ecosystem":"Debian:8","package":"conntrack","fixed_in":["1:1.4.2-2+deb8u1"],"sources":["osv"]},{"ecosystem":"Mageia:4","package":"conntrack-tools","fixed_in":["1.4.2-2.1.mga4"],"sources":["osv"]},{"ecosystem":"Mageia:5","package":"conntrack-tools","fixed_in":["1.4.2-6.1.mga5"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 12","package":"conntrack-tools","fixed_in":["1.4.2-5.2"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 12","package":"libnetfilter_cthelper","fixed_in":["1.0.0-7.1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 12","package":"libnetfilter_cttimeout","fixed_in":["1.0.0-9.1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise Software Development Kit 12","package":"libnetfilter_cthelper","fixed_in":["1.0.0-7.1"],"sources":["osv"]},{"ecosystem":"SUSE:Linux Enterprise Software Development Kit 12","package":"libnetfilter_cttimeout","fixed_in":["1.0.0-9.1"],"sources":["osv"]},{"ecosystem":"SUSE:Cloud Compute Node for SUSE Linux Enterprise 12 5","package":"conntrack-tools","fixed_in":["1.4.2-5.2"],"sources":["osv"]},{"ecosystem":"SUSE:Cloud Compute Node for SUSE Linux Enterprise 12 5","package":"libnetfilter_cthelper","fixed_in":["1.0.0-7.1"],"sources":["osv"]},{"ecosystem":"SUSE:Cloud Compute Node for SUSE Linux 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SP4","package":"conntrack-tools","fixed_in":["1.0.0-0.9.1"],"sources":["osv"]},{"ecosystem":"openSUSE:Tumbleweed","package":"conntrack-tools","fixed_in":["1.4.4-1.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:6.0","package":"conntrack","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:0.9.14-2+deb6u1"}]}],"versions":["1:0.9.14-2"]},{"source":"osv","ecosystem":"Debian:7","package":"conntrack","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.2.1-1+deb7u1"}]}],"versions":["1:1.2.1-1"]},{"source":"osv","ecosystem":"Debian:8","package":"conntrack","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:1.4.2-2+deb8u1"}]}],"versions":["1:1.4.2-2"]},{"source":"osv","ecosystem":"Mageia:4","package":"conntrack-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.2-2.1.mga4"}]}]},{"source":"osv","ecosystem":"Mageia:5","package":"conntrack-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.2-6.1.mga5"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Availability Extension 12","package":"conntrack-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.2-5.2"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Availability Extension 12","package":"libnetfilter_cthelper","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-7.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Availability Extension 12","package":"libnetfilter_cttimeout","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-9.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Software Development Kit 12","package":"libnetfilter_cthelper","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-7.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Software Development Kit 12","package":"libnetfilter_cttimeout","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-9.1"}]}]},{"source":"osv","ecosystem":"SUSE:Cloud Compute Node for SUSE Linux Enterprise 12 5","package":"conntrack-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.2-5.2"}]}]},{"source":"osv","ecosystem":"SUSE:Cloud Compute Node for SUSE Linux Enterprise 12 5","package":"libnetfilter_cthelper","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-7.1"}]}]},{"source":"osv","ecosystem":"SUSE:Cloud Compute Node for SUSE Linux Enterprise 12 5","package":"libnetfilter_cttimeout","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-9.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Availability Extension 11 SP3","package":"conntrack-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-0.9.1"}]}]},{"source":"osv","ecosystem":"SUSE:Linux Enterprise High Availability Extension 11 SP4","package":"conntrack-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-0.9.1"}]}]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"conntrack-tools","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.4.4-1.3"}]}]}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"netfilter","product":"conntrack-tools"}],"references":[{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174875.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2015/08/18/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory"]},{"url":"https://git.netfilter.org/conntrack-tools/commit/?id=c392c159605956c7bd4a264ab4490e2b2704c0cd","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","URL Repurposed"]},{"url":"http://lists.fedoraproject.org/pipermail/package-announce/2016-January/174883.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","Third Party Advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2015/08/14/4","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory"]},{"url":"http://lists.opensuse.org/opensuse-updates/2015-10/msg00015.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","Mailing List","Third Party Advisory"]},{"url":"http://bugzilla.netfilter.org/show_bug.cgi?id=910","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Issue Tracking","Third Party Advisory"]},{"url":"http://www.debian.org/security/2015/dsa-3341","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-6496"},{"url":"https://github.com/advisories/GHSA-v3f5-57x9-2pvx"},{"url":"https://advisories.mageia.org/MGASA-2015-0363.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=16588","tags":["report"]},{"url":"https://www.debian.org/security/2015/dsa-3341","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2015/suse-su-20151545-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/942149","tags":["report"]},{"url":"https://bugzilla.suse.com/944339","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2015-6496","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2015/suse-su-20151683-1/","tags":["advisory"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2015-6496","description":"conntrackd in conntrack-tools 1.4.2 and earlier does not ensure that the optional kernel modules are loaded before using them, which allows remote attackers to cause a denial of service (crash) via a (1) DCCP, (2) SCTP, or (3) ICMPv6 packet.","status":"published","published":"2015-08-24T14:00:00Z","modified":"2024-08-06T07:22:22.134Z","updated_at":"2026-11-02T14:35:42.680858Z"}],"euvd":[{"id":"EUVD-2015-6437","description":"conntrackd in conntrack-tools 1.4.2 and earlier does not ensure that the optional kernel modules are loaded before using them, which allows remote attackers to cause a denial of service (crash) via a (1) DCCP, (2) SCTP, or (3) ICMPv6 packet.","status":"published","published":"2015-08-24T14:00:00Z","modified":"2024-08-06T07:22:22Z","updated_at":"2026-11-03T02:21:55.706543Z"}],"ghsa":[{"id":"GHSA-v3f5-57x9-2pvx","title":"conntrackd in conntrack-tools 1.4.2 and earlier does not ensure that the optional kernel modules...","description":"conntrackd in conntrack-tools 1.4.2 and earlier does not ensure that the optional kernel modules are loaded before using them, which allows remote attackers to cause a denial of service (crash) via a (1) DCCP, (2) SCTP, or (3) ICMPv6 packet.","status":"published","published":"2022-05-14T03:22:05Z","modified":"2023-02-02T05:07:46Z","updated_at":"2026-11-02T14:52:34.922323Z"}],"nvd":[{"id":"CVE-2015-6496","description":"conntrackd in conntrack-tools 1.4.2 and earlier does not ensure that the optional kernel modules are loaded before using them, which allows remote attackers to cause a denial of service (crash) via a (1) DCCP, (2) SCTP, or (3) ICMPv6 packet.","status":"published","published":"2015-08-24T14:59:12.103Z","modified":"2026-06-17T00:30:57.917Z","cvss":[{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-17"],"updated_at":"2026-11-02T14:03:08.998581Z"}],"osv":[{"id":"DLA-295-1","title":"conntrack - security update","status":"published","published":"2015-08-19T00:00:00Z","modified":"2026-03-09T01:18:12.514792Z","updated_at":"2026-11-02T15:46:11.189256Z"},{"id":"DSA-3341-1","title":"conntrack - security update","status":"published","published":"2015-08-20T00:00:00Z","modified":"2026-03-09T01:20:32.681226Z","updated_at":"2026-11-02T15:46:16.199525Z"},{"id":"MGASA-2015-0363","title":"Updated conntrack-tools packages fix CVE-2015-6496","description":"Updated conntrack-tools packages fix security vulnerability:\n\nIt was discovered that in certain configurations, if the relevant conntrack\nkernel module is not loaded, conntrackd will crash when handling DCCP, SCTP or\nICMPv6 packets (CVE-2015-6496).\n","status":"published","published":"2015-09-13T21:58:30Z","modified":"2026-04-16T06:22:31.032314962Z","updated_at":"2026-11-02T15:49:39.792687Z"},{"id":"openSUSE-SU-2024:10430-1","title":"conntrack-tools-1.4.4-1.3 on GA media","description":"These are all security issues fixed in the conntrack-tools-1.4.4-1.3 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:36:45.398232Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"SUSE-SU-2015:1545-1","title":"Security update for conntrack-tools","description":"\nFix a possible crash if conntrackd sees DCCP, SCTP and ICMPv6 traffic\nand the corresponding kernel modules that track this traffic are not\navailable. (bsc#942149, CVE-2015-6496)\n","status":"published","published":"2015-09-04T14:08:40Z","modified":"2026-02-04T02:30:39.635261Z","updated_at":"2026-11-02T15:53:43.030986Z"},{"id":"SUSE-SU-2015:1683-1","title":"Security update for conntrack-tools","description":"\nFix a possible crash if conntrackd sees DCCP, SCTP and ICMPv6 traffic\nand the corresponding kernel modules that track this traffic are not\navailable. (bsc#942149, CVE-2015-6496)\n","status":"published","published":"2015-08-19T07:36:30Z","modified":"2026-02-04T04:02:10.57751Z","updated_at":"2026-11-02T15:53:43.030986Z"}]}}