{"id":"CVE-2016-6170","aliases":["CLSA-2022-1670518442","DEBIAN-CVE-2016-6170","EUVD-2016-7104","GHSA-r98f-r8h7-rj5p","SUSE-SU-2017:0998-1","SUSE-SU-2017:0999-1","SUSE-SU-2017:1000-1","UBUNTU-CVE-2016-6170","USN-5747-1"],"status":"published","title":"ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary...","description":"ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (secondary DNS server crash) via a large AXFR response, and possibly allows IXFR servers to cause a denial of service (IXFR client crash) via a large IXFR response and allows remote authenticated users to cause a denial of service (primary DNS server crash) via a large UPDATE message.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.40937,"percentile":0.98668,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2016-07-06T14:00:00Z","modified":"2026-10-26T10:45:05Z","fixes":[{"ecosystem":"Debian:12","package":"bind9","fixed_in":["1:9.10.6+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"bind9","fixed_in":["1:9.10.6+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"bind9","fixed_in":["1:9.10.6+dfsg-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"bind9","fixed_in":["1:9.10.3.dfsg.P4-8ubuntu1.19+esm5"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"bind9","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"bind9-doc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"bind9-host","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"bind9utils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"dnsutils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"host","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libbind-dev","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libbind-export-dev","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libbind9-140","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libdns-export162","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libdns162","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libirs-export141","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libirs141","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libisc-export160","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libisc160","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libisccc-export140","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libisccc140","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libisccfg-export140","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"libisccfg140","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package":"liblwres141","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els4"}]}],"bundled":2},{"source":"osv","ecosystem":"TuxCare:Ubuntu:16.04","package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List","Third Party Advisory","advisory","report"]},{"url":"https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015073.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","report"]},{"url":"http://www.openwall.com/lists/oss-security/2016/07/06/3","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","report"]},{"url":"http://www.securitytracker.com/id/1036241","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://lists.dns-oarc.net/pipermail/dns-operations/2016-July/015058.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory","advisory","report"]},{"url":"https://security.gentoo.org/glsa/201610-07","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","Third Party 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Advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2016-6170"},{"url":"https://github.com/advisories/GHSA-r98f-r8h7-rj5p"},{"url":"https://errata.cloudlinux.com/ubuntu16-els/CLSA-2022-1670518442","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2016-6170","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2017/suse-su-20170998-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1020983","tags":["report"]},{"url":"https://bugzilla.suse.com/1033466","tags":["report"]},{"url":"https://bugzilla.suse.com/1033467","tags":["report"]},{"url":"https://bugzilla.suse.com/1033468","tags":["report"]},{"url":"https://bugzilla.suse.com/987866","tags":["report"]},{"url":"https://bugzilla.suse.com/989528","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2775","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-6170","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-3136","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-3137","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-3138","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2017/suse-su-20170999-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2017/suse-su-20171000-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2016-6170","tags":["report"]},{"url":"https://kb.isc.org/article/AA-01390/0/Operational-Notification%3A-A-party-that-is-allowed-control-over-zone-data-can-overwhelm-a-server-by-transferring-huge-quantities-of-data.html","tags":["report"]},{"url":"https://gitlab.isc.org/isc-projects/bind9/-/commit/5f8412a4cb5ee14a0e8cddd4107854b40ee3291e","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-5747-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2016-6170","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2016-2775","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2016-6170","description":"ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (secondary DNS server crash) via a large AXFR response, and possibly allows IXFR servers to cause a denial of service (IXFR client crash) via a large IXFR response and allows remote authenticated users to cause a denial of service (primary DNS server crash) via a large UPDATE message.","status":"published","published":"2016-07-06T14:00:00Z","modified":"2024-08-06T01:22:20.635Z","updated_at":"2026-11-02T14:33:34.815789Z"}],"euvd":[{"id":"EUVD-2016-7104","description":"ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (secondary DNS server crash) via a large AXFR response, and possibly allows IXFR servers to cause a denial of service (IXFR client crash) via a large IXFR response and allows remote authenticated users to cause a denial of service (primary DNS server crash) via a large UPDATE message.","status":"published","published":"2016-07-06T14:00:00Z","modified":"2024-08-06T01:22:20Z","updated_at":"2026-11-03T02:22:40.469928Z"}],"ghsa":[{"id":"GHSA-r98f-r8h7-rj5p","title":"ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary...","description":"ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (secondary DNS server crash) via a large AXFR response, and possibly allows IXFR servers to cause a denial of service (IXFR client crash) via a large IXFR response and allows remote authenticated users to cause a denial of service (primary DNS server crash) via a large UPDATE message.","status":"published","published":"2022-05-13T01:18:06Z","modified":"2023-02-01T05:05:21Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:50:14.297796Z"}],"nvd":[{"id":"CVE-2016-6170","description":"ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (secondary DNS server crash) via a large AXFR response, and possibly allows IXFR servers to cause a denial of service (IXFR client crash) via a large IXFR response and allows remote authenticated users to cause a denial of service (primary DNS server crash) via a large UPDATE message.","status":"published","published":"2016-07-06T14:59:05.597Z","modified":"2026-06-17T00:50:34.36Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:03:27.736698Z"}],"osv":[{"id":"CVE-2016-6170","description":"ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (secondary DNS server crash) via a large AXFR response, and possibly allows IXFR servers to cause a denial of service (IXFR client crash) via a large IXFR response and allows remote authenticated users to cause a denial of service (primary DNS server crash) via a large UPDATE message.","status":"published","published":"2016-07-06T14:59:05.597Z","modified":"2026-10-26T10:45:05.329566893Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:02.776224Z"},{"id":"DEBIAN-CVE-2016-6170","description":"ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (secondary DNS server crash) via a large AXFR response, and possibly allows IXFR servers to cause a denial of service (IXFR client crash) via a large IXFR response and allows remote authenticated users to cause a denial of service (primary DNS server crash) via a large UPDATE message.","status":"published","published":"2016-07-06T14:59:05.597Z","modified":"2026-09-22T07:01:38.920139705Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:27.910042Z"},{"id":"UBUNTU-CVE-2016-6170","description":"ISC BIND through 9.9.9-P1, 9.10.x through 9.10.4-P1, and 9.11.x through 9.11.0b1 allows primary DNS servers to cause a denial of service (secondary DNS server crash) via a large AXFR response, and possibly allows IXFR servers to cause a denial of service (IXFR client crash) via a large IXFR response and allows remote authenticated users to cause a denial of service (primary DNS server crash) via a large UPDATE message.","status":"published","published":"2016-07-06T14:59:00Z","modified":"2026-10-17T12:52:45.899205899Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:12.642042Z"},{"id":"CLSA-2022-1670518442","title":"Fix CVE(s): CVE-2016-6170, CVE-2016-2775","description":"\n   * SECURITY UPDATE: degrade resolver performance and possibly DoS\n     - debian/patches/CVE-2016-2775.patch: fix possible infinite loop in\n       lwresd due to a long query name\n     - CVE-2016-2775\n   * SECURITY UPDATE: improper restriction of zone size limit\n     - debian/patches/CVE-2016-6170.patch: allow the maximum number of\n       records in a zone to be specified\n     - CVE-2016-6170","status":"published","published":"2022-12-08T16:54:02Z","modified":"2026-06-04T10:03:13.07481026Z","updated_at":"2026-11-02T15:43:40.176048Z"},{"id":"SUSE-SU-2017:0998-1","title":"Security update for bind","description":"\nThis update for bind fixes the following issues:\n\nCVE-2017-3137 (bsc#1033467):\nMistaken assumptions about the ordering of records in the answer\nsection of a response containing CNAME or DNAME resource records\ncould have been exploited to cause a denial of service of a bind\nserver performing recursion.\n\nCVE-2017-3136 (bsc#1033466):\nAn attacker could have constructed a query that would cause a denial\nof service of servers configured to use DNS64.\n\nCVE-2017-3138 (bsc#1033468):\nAn attacker with access to the BIND control channel could have caused\nthe server to stop by triggering an assertion failure.\n\nCVE-2016-6170 (bsc#987866):\nPrimary DNS servers could have caused a denial of service of secondary DNS servers via a large AXFR response.\nIXFR servers could have caused a denial of service of IXFR clients via a large IXFR response.\nRemote authenticated users could have caused a denial of service of primary DNS servers via a large UPDATE message.\n\nCVE-2016-2775 (bsc#989528):\nWhen lwresd or the named lwres option were enabled, bind allowed remote attackers to cause a denial of service \n(daemon crash) via a long request that uses the lightweight resolver protocol.\n\nOne additional non-security bug was fixed:\n\nThe default umask was changed to 077. (bsc#1020983)\n\n","status":"published","published":"2017-04-13T00:33:44Z","modified":"2026-02-04T03:47:27.061528Z","updated_at":"2026-11-02T15:53:43.83457Z"},{"id":"SUSE-SU-2017:0999-1","title":"Security update for bind","description":"\nThis update for bind fixes the following issues:\n\nCVE-2017-3137 (bsc#1033467):\nMistaken assumptions about the ordering of records in the answer\nsection of a response containing CNAME or DNAME resource records\ncould have been exploited to cause a denial of service of a bind\nserver performing recursion.\n\nCVE-2017-3136 (bsc#1033466):\nAn attacker could have constructed a query that would cause a denial\nof service of servers configured to use DNS64.\n\nCVE-2017-3138 (bsc#1033468):\nAn attacker with access to the BIND control channel could have caused\nthe server to stop by triggering an assertion failure.\n\nCVE-2016-6170 (bsc#987866):\nPrimary DNS servers could have caused a denial of service of secondary DNS servers via a large AXFR response.\nIXFR servers could have caused a denial of service of IXFR clients via a large IXFR response.\nRemote authenticated users could have caused a denial of service of primary DNS servers via a large UPDATE message.\n\nCVE-2016-2775 (bsc#989528):\nWhen lwresd or the named lwres option were enabled, bind allowed remote attackers to cause a denial of service \n(daemon crash) via a long request that uses the lightweight resolver protocol.\n\n","status":"published","published":"2017-04-13T00:32:22Z","modified":"2026-02-04T04:29:43.366413Z","updated_at":"2026-11-02T15:53:43.83457Z"},{"id":"SUSE-SU-2017:1000-1","title":"Security update for bind","description":"\nThis update for bind fixes the following security issues:\n\nCVE-2017-3137 (bsc#1033467):\nMistaken assumptions about the ordering of records in the answer\nsection of a response containing CNAME or DNAME resource records\ncould have been exploited to cause a denial of service of a bind\nserver performing recursion.\n\nCVE-2017-3136 (bsc#1033466):\nAn attacker could have constructed a query that would cause a denial\nof service of servers configured to use DNS64.\n\nCVE-2017-3138 (bsc#1033468):\nAn attacker with access to the BIND control channel could have caused\nthe server to stop by triggering an assertion failure.\n\nCVE-2016-6170 (bsc#987866):\nPrimary DNS servers could have caused a denial of service of secondary DNS servers via a large AXFR response.\nIXFR servers could have caused a denial of service of IXFR clients via a large IXFR response.\nRemote authenticated users could have caused a denial of service of primary DNS servers via a large UPDATE message.\n\nCVE-2016-2775 (bsc#989528):\nWhen lwresd or the named lwres option were enabled, bind allowed remote attackers to cause a denial of service\n(daemon crash) via a long request that uses the lightweight resolver protocol.\n\n","status":"published","published":"2017-04-13T00:37:13Z","modified":"2026-02-04T04:30:23.275004Z","updated_at":"2026-11-02T15:53:43.83457Z"},{"id":"USN-5747-1","title":"bind9 vulnerabilities","description":"It was discovered that Bind incorrectly handled large query name when using\nlightweight resolver protocol. A remote attacker could use this issue to\nconsume resources, leading to a denial of service. (CVE-2016-2775)\n\nIt was discovered that Bind incorrectly handled large zone data size\nreceived via AXFR response. A remote authenticated attacker could use this\nissue to consume resources, leading to a denial of service. This issue only\naffected Ubuntu 16.04 LTS. (CVE-2016-6170)\n","status":"published","published":"2022-11-29T12:09:33Z","modified":"2026-06-29T13:50:43.711102646Z","updated_at":"2026-11-02T16:58:16.20937Z"}]}}