{"id":"CVE-2016-0747","aliases":["DEBIAN-CVE-2016-0747","DSA-3473-1","EUVD-2016-0770","GHSA-769v-gfhq-g2w7","MGASA-2016-0065","RHSA-2016:1425","SUSE-SU-2016:1232-1","UBUNTU-CVE-2016-0747","USN-2892-1","openSUSE-SU-2024:10044-1"],"status":"published","title":"The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME...","description":"The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.08664,"percentile":0.95149,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2016-01-26T00:00:00Z","modified":"2026-10-24T10:30:34Z","fixes":[{"ecosystem":"Debian:12","package":"nginx","fixed_in":["1.9.10-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"nginx","fixed_in":["1.9.10-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"nginx","fixed_in":["1.9.10-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:14.04:LTS","package":"nginx","fixed_in":["1.4.6-1ubuntu3.4"],"sources":["osv"]},{"ecosystem":"Ubuntu:16.04:LTS","package":"nginx","fixed_in":["1.9.10-0ubuntu1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.10-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.10-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.9.10-1"}]}]},{"source":"osv","ecosystem":"Debian:7","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.2.1-2.2+wheezy4"}]}],"versions":["1.2.1-2.2","1.2.1-2.2+wheezy1","1.2.1-2.2+wheezy2","1.2.1-2.2+wheezy3","1.2.1-2.2+wheezy3~bpo60+1"],"bundled":3},{"source":"osv","ecosystem":"Debian:8","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.2-5+deb8u1"}]}],"versions":["1.6.2-5","1.6.2-5+a.exp1","1.6.2-5+deb8u1~bpo70+1"],"bundled":3},{"source":"osv","ecosystem":"Mageia:5","package":"nginx","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.2-5.1.mga5"}]}],"bundled":3},{"source":"osv","ecosystem":"Red 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List","Third Party Advisory","advisory"]},{"url":"https://bto.bluecoat.com/security-advisory/sa115","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"https://security.gentoo.org/glsa/201606-06","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.securitytracker.com/id/1034869","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"http://mailman.nginx.org/pipermail/nginx/2016-January/049700.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Vendor Advisory","advisory","web","report"]},{"url":"https://access.redhat.com/errata/RHSA-2016:1425","tags":["vendor-advisory","x_refsource_REDHAT","x_transferred","Third Party Advisory","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1302589","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Patch","Third Party Advisory","fix","report"]},{"url":"http://www.debian.org/security/2016/dsa-3473","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory","advisory"]},{"url":"http://www.ubuntu.com/usn/USN-2892-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred","Third Party Advisory","advisory"]},{"url":"https://support.apple.com/kb/HT212818","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory"]},{"url":"http://seclists.org/fulldisclosure/2021/Sep/36","tags":["mailing-list","x_refsource_FULLDISC","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-0747","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-769v-gfhq-g2w7"},{"url":"https://security-tracker.debian.org/tracker/CVE-2016-0747","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2016-0065.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=17631","tags":["report"]},{"url":"https://www.debian.org/security/2016/dsa-3473","tags":["web"]},{"url":"https://access.redhat.com/security/updates/classification/#moderate","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1302587","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1302588","tags":["report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1341462","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2016/rhsa-2016_1425.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2016-0742","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-0742","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-0742","tags":["advisory"]},{"url":"http://mailman.nginx.org/pipermail/nginx-announce/2016/000169.html","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2016-0746","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-0746","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-0746","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2016-0747","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-0747","tags":["advisory","report"]},{"url":"https://access.redhat.com/security/cve/CVE-2016-4450","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-4450","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-4450","tags":["advisory"]},{"url":"http://mailman.nginx.org/pipermail/nginx-announce/2016/000179.html","tags":["article"]},{"url":"https://www.suse.com/support/update/announcement/2016/suse-su-20161232-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/963775","tags":["report"]},{"url":"https://bugzilla.suse.com/963778","tags":["report"]},{"url":"https://bugzilla.suse.com/963781","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2016-0742","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-0746","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-0747","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2016-0747","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-2892-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-0742","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-0746","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2011-4315","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2012-2089","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-2070","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2013-4547","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-0133","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-3556","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2014-3616","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-4450","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2016-0747","description":"The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.","status":"published","published":"2016-02-15T19:00:00Z","modified":"2024-08-05T22:30:04.106Z","updated_at":"2026-11-02T14:33:37.446553Z"}],"euvd":[{"id":"EUVD-2016-0770","description":"The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.","status":"published","published":"2016-02-15T19:00:00Z","modified":"2024-08-05T22:30:04Z","updated_at":"2026-11-03T02:23:00.426765Z"}],"ghsa":[{"id":"GHSA-769v-gfhq-g2w7","title":"The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME...","description":"The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.","status":"published","published":"2022-05-13T01:04:26Z","modified":"2023-02-01T05:02:44Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:49:57.916243Z"}],"nvd":[{"id":"CVE-2016-0747","description":"The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.","status":"published","published":"2016-02-15T19:59:02.123Z","modified":"2026-06-17T00:38:08.503Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:03:22.479119Z"}],"osv":[{"id":"CVE-2016-0747","description":"The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.","status":"published","published":"2016-02-15T19:59:02.123Z","modified":"2026-10-24T10:30:34.585616135Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:44:01.531338Z"},{"id":"DEBIAN-CVE-2016-0747","description":"The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.","status":"published","published":"2016-02-15T19:59:02.123Z","modified":"2026-09-22T07:00:04.042955196Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:45:27.323751Z"},{"id":"UBUNTU-CVE-2016-0747","description":"The resolver in nginx before 1.8.1 and 1.9.x before 1.9.10 does not properly limit CNAME resolution, which allows remote attackers to cause a denial of service (worker process resource consumption) via vectors related to arbitrary name resolution.","status":"published","published":"2016-01-26T00:00:00Z","modified":"2026-02-04T03:59:29.544223Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"},{"version":"3.0","score":5.3,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:54:11.100633Z"},{"id":"DSA-3473-1","title":"nginx - security update","status":"published","published":"2016-02-11T00:00:00Z","modified":"2026-03-09T01:22:07.437635Z","updated_at":"2026-11-02T15:46:16.199525Z"},{"id":"MGASA-2016-0065","title":"Updated nginx packages fix security vulnerabilities","description":"Updated nginx package fixes security vulnerabilities:\n\nSeveral vulnerabilities were discovered in the resolver in nginx, leading to\ndenial of service or, potentially, to arbitrary code execution. These only\naffect nginx if the \"resolver\" directive is used in a configuration file\n(CVE-2016-0742, CVE-2016-0746, CVE-2016-0747).\n","status":"published","published":"2016-02-17T19:06:01Z","modified":"2026-04-16T06:25:51.381612774Z","updated_at":"2026-11-02T15:49:39.792687Z"},{"id":"openSUSE-SU-2024:10044-1","title":"nginx-1.11.4-2.5 on GA media","description":"These are all security issues fixed in the nginx-1.11.4-2.5 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:22:35.012911Z","updated_at":"2026-11-02T16:58:33.135986Z"},{"id":"RHSA-2016:1425","title":"Red Hat Security Advisory: rh-nginx18-nginx security update","status":"published","published":"2024-09-13T12:28:22Z","modified":"2026-06-29T10:12:55Z","updated_at":"2026-11-02T15:53:03.734507Z"},{"id":"SUSE-SU-2016:1232-1","title":"Security update for nginx-1.0","description":"\nThis update for nginx-1.0 fixes the following issues:\n\nSecurity fixes:\n- CVE-2016-0742: Invalid pointer dereference during DNS server response processing\n- CVE-2016-0747: Resource exhaustion through unlimited CNAME resolution\n- CVE-2016-0746: Use-after-free condition during CNAME response processing\n","status":"published","published":"2016-05-04T12:28:17Z","modified":"2026-02-04T02:24:16.234308Z","updated_at":"2026-11-02T15:53:43.438985Z"},{"id":"USN-2892-1","title":"nginx vulnerabilities","description":"It was discovered that nginx incorrectly handled certain DNS server\nresponses when the resolver is enabled. A remote attacker could possibly\nuse this issue to cause nginx to crash, resulting in a denial of service.\n(CVE-2016-0742)\n\nIt was discovered that nginx incorrectly handled CNAME response processing\nwhen the resolver is enabled. A remote attacker could use this issue to\ncause nginx to crash, resulting in a denial of service, or possibly execute\narbitrary code. (CVE-2016-0746)\n\nIt was discovered that nginx incorrectly handled CNAME resolution when\nthe resolver is enabled. A remote attacker could possibly use this issue to\ncause nginx to consume resources, resulting in a denial of service.\n(CVE-2016-0747)\n","status":"published","published":"2016-02-09T18:07:39Z","modified":"2026-02-10T04:40:57Z","updated_at":"2026-11-02T16:58:10.303275Z"}]}}