{"id":"CVE-2019-6471","aliases":["ALPINE-CVE-2019-6471","BELL-CVE-2019-6471","DEBIAN-CVE-2019-6471","EUVD-2019-16031","GHSA-52fp-qxmc-8q94","MGASA-2019-0299","RHSA-2019:1714","SUSE-SU-2019:2502-1","SUSE-SU-2019:2550-1","UBUNTU-CVE-2019-6471","USN-4026-1","openSUSE-SU-2019:2263-1","openSUSE-SU-2019:2265-1","openSUSE-SU-2024:10650-1"],"status":"published","title":"A race condition when discarding malformed packets can cause BIND to exit with an assertion failure","description":"A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -\u003e 9.11.7, 9.12.0 -\u003e 9.12.4-P1, 9.14.0 -\u003e 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -\u003e 9.11.7-S1.","severity":{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.03286,"percentile":0.88554,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-362","CWE-617"],"published":"2019-06-19T00:00:00Z","modified":"2026-10-24T10:30:39Z","fixes":[{"ecosystem":"Alpine:v3.10","package":"bind","fixed_in":["9.14.3-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.11","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"bind","fixed_in":["9.14.4-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.7","package":"bind","fixed_in":["9.11.8-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.8","package":"bind","fixed_in":["9.12.4_p2-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.9","package":"bind","fixed_in":["9.12.4_p2-r0"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"bind9","fixed_in":["1:9.11.5.P4+dfsg-5.1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"bind9","fixed_in":["1:9.11.5.P4+dfsg-5.1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"bind9","fixed_in":["1:9.11.5.P4+dfsg-5.1"],"sources":["osv"]},{"ecosystem":"Red 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9"}],"references":[{"url":"https://kb.isc.org/docs/cve-2019-6471","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","article"]},{"url":"https://support.f5.com/csp/article/K10092301?utm_source=f5support\u0026amp%3Butm_medium=RSS","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-6471","tags":["advisory"]},{"url":"https://support.f5.com/csp/article/K10092301?utm_source=f5support\u0026amp;utm_medium=RSS"},{"url":"https://github.com/advisories/GHSA-52fp-qxmc-8q94"},{"url":"https://security.alpinelinux.org/vuln/CVE-2019-6471","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2019-6471","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-6471","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2019-0299.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=24422","tags":["report"]},{"url":"https://access.redhat.com/errata/RHSA-2019:1294","tags":["web"]},{"url":"https://access.redhat.com/errata/RHSA-2019:1714","tags":["web","advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#important","tags":["article"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1721780","tags":["report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2019/rhsa-2019_1714.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2019-6471","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-6471","tags":["advisory","report"]},{"url":"https://www.suse.com/support/update/announcement/2019/suse-su-20192502-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1104129","tags":["report"]},{"url":"https://bugzilla.suse.com/1118367","tags":["report"]},{"url":"https://bugzilla.suse.com/1118368","tags":["report"]},{"url":"https://bugzilla.suse.com/1126068","tags":["report"]},{"url":"https://bugzilla.suse.com/1126069","tags":["report"]},{"url":"https://bugzilla.suse.com/1128220","tags":["report"]},{"url":"https://bugzilla.suse.com/1133185","tags":["report"]},{"url":"https://bugzilla.suse.com/1138687","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2018-5740","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-5743","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-5745","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-6465","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-6471","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2019/suse-su-20192550-1/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-6471","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-4026-1","tags":["advisory"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/JDSATIKRTNU4IHS3ENG7ARED7FLSBNZK/#JDSATIKRTNU4IHS3ENG7ARED7FLSBNZK","tags":["advisory"]},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/UC5XCUBLMFQMOGLYKZG6JGMVGRAOCYY3/#UC5XCUBLMFQMOGLYKZG6JGMVGRAOCYY3","tags":["advisory"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2006-4339","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2007-2925","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2007-2926","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2015-8461","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-2775","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-9131","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2016-9778","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-3135","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-3141","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-3142","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-3145","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-5737","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-6476","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2019-6477","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8616","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8617","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8618","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8619","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8620","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8621","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8622","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8623","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8624","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8625","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-25214","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-25215","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-25216","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-25218","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2019-6471","title":"A race condition when discarding malformed packets can cause BIND to exit with an assertion failure","description":"A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -\u003e 9.11.7, 9.12.0 -\u003e 9.12.4-P1, 9.14.0 -\u003e 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -\u003e 9.11.7-S1.","status":"published","published":"2019-10-09T14:17:14.566Z","modified":"2024-09-17T01:56:17.224Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:20:23.381621Z"}],"euvd":[{"id":"EUVD-2019-16031","description":"A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -\u003e 9.11.7, 9.12.0 -\u003e 9.12.4-P1, 9.14.0 -\u003e 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -\u003e 9.11.7-S1.","status":"published","published":"2019-10-09T14:17:14Z","modified":"2024-09-17T01:56:17Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T00:28:45.29969Z"}],"ghsa":[{"id":"GHSA-52fp-qxmc-8q94","title":"A race condition which may occur when discarding malformed packets can result in BIND exiting due...","description":"A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -\u003e 9.11.7, 9.12.0 -\u003e 9.12.4-P1, 9.14.0 -\u003e 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -\u003e 9.11.7-S1.","status":"published","published":"2022-05-24T16:58:21Z","modified":"2023-01-28T05:07:19Z","cwes":["CWE-362"],"updated_at":"2026-11-02T14:44:30.65038Z"}],"nvd":[{"id":"CVE-2019-6471","description":"A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -\u003e 9.11.7, 9.12.0 -\u003e 9.12.4-P1, 9.14.0 -\u003e 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -\u003e 9.11.7-S1.","status":"published","published":"2019-10-09T16:15:17.17Z","modified":"2026-06-17T02:39:06.21Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-362","CWE-617"],"updated_at":"2026-11-02T14:05:31.019577Z"}],"osv":[{"id":"ALPINE-CVE-2019-6471","description":"A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -\u003e 9.11.7, 9.12.0 -\u003e 9.12.4-P1, 9.14.0 -\u003e 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -\u003e 9.11.7-S1.","status":"published","published":"2019-10-09T16:15:17.17Z","modified":"2026-09-21T06:17:52.529895239Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:27:48.11886Z"},{"id":"BELL-CVE-2019-6471","title":"CVE-2019-6471 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:15:46.359796Z","modified":"2026-01-26T09:49:28.787227Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:15.340685Z"},{"id":"CVE-2019-6471","description":"A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -\u003e 9.11.7, 9.12.0 -\u003e 9.12.4-P1, 9.14.0 -\u003e 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -\u003e 9.11.7-S1.","status":"published","published":"2019-10-09T16:15:17.17Z","modified":"2026-10-24T10:30:39.035957291Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:12.675558Z"},{"id":"DEBIAN-CVE-2019-6471","description":"A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -\u003e 9.11.7, 9.12.0 -\u003e 9.12.4-P1, 9.14.0 -\u003e 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -\u003e 9.11.7-S1.","status":"published","published":"2019-10-09T16:15:17.17Z","modified":"2026-09-21T07:02:38.421704175Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:32.57265Z"},{"id":"RHSA-2019:1714","title":"Red Hat Security Advisory: bind security update","status":"published","published":"2024-09-16T02:40:46Z","modified":"2026-06-26T12:21:56.742584363Z","cvss":[{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:53:06.0195Z"},{"id":"UBUNTU-CVE-2019-6471","description":"A race condition which may occur when discarding malformed packets can result in BIND exiting due to a REQUIRE assertion failure in dispatch.c. Versions affected: BIND 9.11.0 -\u003e 9.11.7, 9.12.0 -\u003e 9.12.4-P1, 9.14.0 -\u003e 9.14.2. Also all releases of the BIND 9.13 development branch and version 9.15.0 of the BIND 9.15 development branch and BIND Supported Preview Edition versions 9.11.3-S1 -\u003e 9.11.7-S1.","status":"published","published":"2019-06-19T00:00:00Z","modified":"2026-04-22T12:20:20.53874Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"},{"version":"3.0","score":5.9,"vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:21.741399Z"},{"id":"MGASA-2019-0299","title":"Updated bind packages fix security vulnerabilities","description":"Updated bind packages fix security vulnerabilities\n\nLimiting simultaneous TCP clients is ineffective (CVE-2018-5743)\n\nRace condition when discarding malformed packets can cause bind to\nexit with assertion failure (CVE-2019-6471)\n\nIn addition to those two security issues, this package releases also\nfixes two additional issues:\n- a missing conflict tag between old bind and bnew ind-utils subpackages,\n  preventing upgrade due to a file conflict\n- missing root.key file, despite this one being refered in default\n  configuration\n","status":"published","published":"2019-10-23T21:06:40Z","modified":"2026-04-16T04:44:42.016814329Z","updated_at":"2026-11-02T15:49:41.151324Z"},{"id":"openSUSE-SU-2019:2263-1","title":"Security update for bind","description":"This update for bind fixes the following issues:\n\nSecurity issue fixed:\n\n- CVE-2019-6471: Fixed a reachable assert in dispatch.c. (bsc#1138687)\n\nNon-security issue fixed:\n\n- bind will no longer rely on /etc/insserv.conf (bsc#1118367, bsc#1118368)\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2019-10-06T09:57:35Z","modified":"2026-02-04T02:42:20.857661Z","updated_at":"2026-11-02T16:58:30.784344Z"},{"id":"openSUSE-SU-2019:2265-1","title":"Security update for bind","description":"This update for bind fixes the following issues:\n\nSecurity issue fixed:\n\n- CVE-2019-6471: Fixed a reachable assert in dispatch.c. (bsc#1138687)\n\nNon-security issue fixed:\n\n- bind will no longer rely on /etc/insserv.conf (bsc#1118367, bsc#1118368)\n\nThis update was imported from the SUSE:SLE-15:Update update project.","status":"published","published":"2019-10-06T09:57:56Z","modified":"2026-02-04T02:16:58.296526Z","updated_at":"2026-11-02T16:58:30.784344Z"},{"id":"openSUSE-SU-2024:10650-1","title":"bind-9.16.20-1.4 on GA media","description":"These are all security issues fixed in the bind-9.16.20-1.4 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:52:09.525836Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"SUSE-SU-2019:2502-1","title":"Security update for bind","description":"This update for bind fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2019-6465: Fixed an issue where controls for zone transfers may not be properly applied to Dynamically Loadable Zones (bsc#1126069).\n- CVE-2019-6471: Fixed a reachable assert in dispatch.c. (bsc#1138687)\n- CVE-2018-5745: Fixed a denial of service vulnerability if a trust anchor rolls over to an unsupported key algorithm when using managed-keys (bsc#1126068).\n- CVE-2018-5743: Fixed a denial of service vulnerability which could be caused by to many simultaneous TCP connections (bsc#1133185).\n- CVE-2018-5740: Fixed a denial of service vulnerability in the 'deny-answer-aliases' feature (bsc#1104129).\n\nNon-security issues fixed:\n\n- Don't rely on /etc/insserv.conf anymore for proper dependencies against \n  nss-lookup.target in named.service and lwresd.service (bsc#1118367, bsc#1118368).\n- Fix FIPS related regression (bsc#1128220).\n","status":"published","published":"2019-10-01T11:06:19Z","modified":"2026-02-04T03:07:35.67838Z","updated_at":"2026-11-02T15:53:46.44301Z"},{"id":"SUSE-SU-2019:2550-1","title":"Security update for bind","description":"This update for bind fixes the following issues:\n\nSecurity issue fixed:\n\n- CVE-2019-6471: Fixed a reachable assert in dispatch.c. (bsc#1138687)\n\nNon-security issue fixed:\n\n- bind will no longer rely on /etc/insserv.conf (bsc#1118367, bsc#1118368)\n","status":"published","published":"2019-10-04T11:17:28Z","modified":"2026-02-04T03:35:07.713391Z","updated_at":"2026-11-02T15:53:47.06185Z"},{"id":"USN-4026-1","title":"bind9 vulnerability","description":"It was discovered that Bind incorrectly handled certain malformed packets.\nA remote attacker could possibly use this issue to cause Bind to crash,\nresulting in a denial of service.\n","status":"published","published":"2019-06-20T11:22:06Z","modified":"2026-04-22T09:57:53.675641Z","updated_at":"2026-11-02T16:58:14.019824Z"}]}}