{"id":"CVE-2012-6687","aliases":["AZL-34685","AZL-6418","DEBIAN-CVE-2012-6687","DLA-430-1","DLA-431-1","EUVD-2012-6529","GHSA-v5rv-9c87-6gww","MGASA-2015-0184","MGASA-2016-0089","OESA-2025-1041","UBUNTU-CVE-2012-6687"],"status":"published","title":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service ...","description":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.","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":0.06086,"percentile":0.9346,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2015-02-19T15:00:00Z","modified":"2026-10-23T17:47:43Z","fixes":[{"ecosystem":"Azure Linux:3","package":"fcgi","fixed_in":["2.4.0-7"],"sources":["osv"]},{"ecosystem":"Azure Linux:2","package":"fcgi","fixed_in":["2.4.0-7"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"libfcgi","fixed_in":["2.4.0-8.3"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"libfcgi","fixed_in":["2.4.0-8.3"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libfcgi","fixed_in":["2.4.0-8.3"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"libfcgi-perl","fixed_in":["0.78-2"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"libfcgi-perl","fixed_in":["0.78-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libfcgi-perl","fixed_in":["0.78-2"],"sources":["osv"]},{"ecosystem":"Debian:6.0","package":"libfcgi","fixed_in":["2.4.0-8+deb6u1"],"sources":["osv"]},{"ecosystem":"Debian:6.0","package":"libfcgi-perl","fixed_in":["0.71-1+squeeze1+deb6u1"],"sources":["osv"]},{"ecosystem":"Mageia:4","package":"fcgi","fixed_in":["2.4.0-15.1.mga4"],"sources":["osv"]},{"ecosystem":"Mageia:5","package":"perl-FCGI","fixed_in":["0.770.0-4.1.mga5"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP4","package":"perl-FCGI","fixed_in":["0.78-13.oe2003sp4"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS","package":"perl-FCGI","fixed_in":["0.82-3.oe2403sp1"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP4","package":"perl-FCGI","fixed_in":["0.78-13.oe2203sp4"],"sources":["osv"]},{"ecosystem":"openEuler:24.03-LTS-SP1","package":"perl-FCGI","fixed_in":["0.82-3.oe2403sp1"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP3","package":"perl-FCGI","fixed_in":["0.78-13.oe2203sp3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:3","package":"fcgi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.0-7"}]}]},{"source":"osv","ecosystem":"Azure Linux:2","package":"fcgi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.0-7"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"libfcgi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.0-8.3"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"libfcgi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.0-8.3"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"libfcgi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.0-8.3"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"libfcgi-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.78-2"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"libfcgi-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.78-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"libfcgi-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.78-2"}]}]},{"source":"osv","ecosystem":"Debian:6.0","package":"libfcgi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.0-8+deb6u1"}]}],"versions":["2.4.0-8"]},{"source":"osv","ecosystem":"Debian:6.0","package":"libfcgi-perl","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.71-1+squeeze1+deb6u1"}]}],"versions":["0.71-1","0.71-1+squeeze1"]},{"source":"osv","ecosystem":"Mageia:4","package":"fcgi","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.4.0-15.1.mga4"}]}]},{"source":"osv","ecosystem":"Mageia:5","package":"perl-FCGI","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.770.0-4.1.mga5"}]}]},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP4","package":"perl-FCGI","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.78-13.oe2003sp4"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS","package":"perl-FCGI","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.82-3.oe2403sp1"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP4","package":"perl-FCGI","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.78-13.oe2203sp4"}]}]},{"source":"osv","ecosystem":"openEuler:24.03-LTS-SP1","package":"perl-FCGI","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.82-3.oe2403sp1"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP3","package":"perl-FCGI","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.78-13.oe2203sp3"}]}]}],"products":[{"vendor":"fastcgi","product":"fcgi"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1189958","tags":["x_refsource_CONFIRM","x_transferred","report"]},{"url":"https://bugs.launchpad.net/ubuntu/+source/libfcgi/+bug/933417","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://advisories.mageia.org/MGASA-2015-0184.html","tags":["x_refsource_CONFIRM","x_transferred","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2015/02/07/4","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/100696","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=681591","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2015/02/06/4","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2012-6687","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-v5rv-9c87-6gww"},{"url":"https://security-tracker.debian.org/tracker/CVE-2012-6687","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2015-0184.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=15808","tags":["report"]},{"url":"https://lists.fedoraproject.org/pipermail/package-announce/2015-April/156731.html","tags":["web"]},{"url":"https://advisories.mageia.org/MGASA-2016-0089.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=17823","tags":["report"]},{"url":"http://lwn.net/Alerts/677312/","tags":["web"]},{"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1041","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2012-6687","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2012-6687","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2012-6687","description":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.","status":"published","published":"2015-02-19T15:00:00Z","modified":"2024-08-06T21:36:02.206Z","updated_at":"2026-11-02T14:34:51.269982Z"}],"euvd":[{"id":"EUVD-2012-6529","description":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.","status":"published","published":"2015-02-19T15:00:00Z","modified":"2024-08-06T21:36:02Z","updated_at":"2026-11-03T01:56:01.964017Z"}],"ghsa":[{"id":"GHSA-v5rv-9c87-6gww","title":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service ...","description":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.","status":"published","published":"2022-05-17T01:16:26Z","modified":"2023-02-03T05:03:38Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:53:23.659712Z"}],"nvd":[{"id":"CVE-2012-6687","description":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.","status":"published","published":"2015-02-19T15:59:00.047Z","modified":"2026-06-16T23:48:36.22Z","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-20"],"updated_at":"2026-11-02T14:02:17.748457Z"}],"osv":[{"id":"AZL-34685","title":"CVE-2012-6687 affecting package fcgi for versions less than 2.4.0-7","description":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.","status":"published","published":"2015-02-19T15:59:00Z","modified":"2026-04-21T04:49:22.961662Z","updated_at":"2026-11-02T15:28:03.821827Z"},{"id":"AZL-6418","title":"CVE-2012-6687 affecting package fcgi for versions less than 2.4.0-7","description":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.","status":"published","published":"2015-02-19T15:59:00Z","modified":"2026-04-21T04:32:18.925777Z","updated_at":"2026-11-02T15:28:07.805289Z"},{"id":"CVE-2012-6687","description":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.","status":"published","published":"2015-02-19T15:59:00Z","modified":"2026-04-16T06:24:39.808428294Z","updated_at":"2026-11-02T15:43:58.802805Z"},{"id":"DEBIAN-CVE-2012-6687","description":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.","status":"published","published":"2015-02-19T15:59:00.047Z","modified":"2026-10-23T17:47:43.254483442Z","updated_at":"2026-11-02T15:45:25.218101Z"},{"id":"DLA-430-1","title":"libfcgi - security update","status":"published","published":"2016-02-25T00:00:00Z","modified":"2026-03-09T02:10:23.159458Z","updated_at":"2026-11-02T15:46:12.7027Z"},{"id":"DLA-431-1","title":"libfcgi-perl - security update","status":"published","published":"2016-02-25T00:00:00Z","modified":"2026-03-09T02:10:33.716563Z","updated_at":"2026-11-02T15:46:12.7027Z"},{"id":"MGASA-2015-0184","title":"Updated fcgi packages fix CVE-2012-6687","description":"Updated fcgi packages fix security vulnerability:\n\nFCGI does not perform range checks for file descriptors before use of the\nFD_SET macro.  This FD_SET macro could allow for more than 1024 total file\ndescriptors to be monitored in the closing state. This may allow remote\nattackers to cause a denial of service (stack memory corruption, and infinite\nloop or daemon crash) by opening many socket connections to the host and\ncrashing the service (CVE-2012-6687).\n","status":"published","published":"2015-05-03T00:19:16Z","modified":"2026-04-16T06:23:15.821464177Z","updated_at":"2026-11-02T15:49:39.488462Z"},{"id":"MGASA-2016-0089","title":"Updated perl-FCGI packages fix CVE-2012-6687","description":"Updated fcgi packages fix security vulnerability:\n\nFCGI does not perform range checks for file descriptors before use of the\nFD_SET macro.  This FD_SET macro could allow for more than 1024 total file\ndescriptors to be monitored in the closing state. This may allow remote\nattackers to cause a denial of service (stack memory corruption, and infinite\nloop or daemon crash) by opening many socket connections to the host and\ncrashing the service (CVE-2012-6687).\n","status":"published","published":"2016-03-02T18:28:46Z","modified":"2026-04-16T06:23:33.818527762Z","updated_at":"2026-11-02T15:49:39.792687Z"},{"id":"OESA-2025-1041","title":"perl-FCGI security update","description":"FastCGI Perl bingdings.\r\n\r\nSecurity Fix(es):\r\n\r\n(CVE-2012-6687)","status":"published","published":"2025-01-17T11:08:08Z","modified":"2026-08-18T01:18:44.873379234Z","updated_at":"2026-11-02T15:52:42.253598Z"},{"id":"UBUNTU-CVE-2012-6687","description":"FastCGI (aka fcgi and libfcgi) 2.4.0 allows remote attackers to cause a denial of service (segmentation fault and crash) via a large number of connections.","status":"withdrawn","published":"2015-02-19T15:59:00Z","modified":"2025-07-16T07:17:04.398497Z","updated_at":"2026-11-02T15:54:06.854805Z"}]}}