{"id":"CVE-2017-6519","aliases":["ALPINE-CVE-2017-6519","AZL-6322","BELL-CVE-2017-6519","DEBIAN-CVE-2017-6519","EUVD-2017-15575","GHSA-6vpj-pr2c-5mm2","MGASA-2019-0081","RHSA-2020:1176","UBUNTU-CVE-2017-6519","USN-3876-1","openSUSE-SU-2024:10643-1"],"status":"published","title":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with...","description":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive  information from the responding device via port-5353 UDP packets.  NOTE: this may overlap CVE-2015-2809.","severity":{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.03238,"percentile":0.88362,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-346"],"published":"2017-04-30T00:00:00Z","modified":"2026-10-20T10:49:30Z","fixes":[{"ecosystem":"Alpine:v3.10","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.11","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.7","package":"avahi","fixed_in":["0.6.32-r5"],"sources":["osv"]},{"ecosystem":"Alpine:v3.8","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.9","package":"avahi","fixed_in":["0.7-r2"],"sources":["osv"]},{"ecosystem":"Azure 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Advisory","advisory","report"]},{"url":"https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0%40%3Cissues.bookkeeper.apache.org%3E","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-6519","tags":["web","advisory"]},{"url":"https://lists.apache.org/thread.html/r1b103833cb5bc8466e24ff0ecc5e75b45a705334ab6a444e64e840a0@%3Cissues.bookkeeper.apache.org%3E"},{"url":"https://usn.ubuntu.com/3876-1"},{"url":"https://usn.ubuntu.com/3876-2"},{"url":"https://github.com/advisories/GHSA-6vpj-pr2c-5mm2"},{"url":"https://security.alpinelinux.org/vuln/CVE-2017-6519","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2017-6519","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2017-6519","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2019-0081.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=24251","tags":["report"]},{"url":"https://access.redhat.com/errata/RHSA-2020:1176","tags":["advisory"]},{"url":"https://access.redhat.com/security/updates/classification/#low","tags":["article"]},{"url":"https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/7.8_release_notes/index","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_1176.json","tags":["advisory"]},{"url":"https://access.redhat.com/security/cve/CVE-2017-6519","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-6519","tags":["advisory","report"]},{"url":"https://www.kb.cert.org/vuls/id/550620","tags":["advisory","report"]},{"url":"https://ubuntu.com/security/CVE-2017-6519","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-3876-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/notices/USN-3876-2","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2018-1000845","tags":["report"]},{"url":"","tags":["advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2006-5461","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2007-3372","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2008-5081","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2017-6519","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2018-1000845","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-26720","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3468","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3502","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2017-6519","description":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive  information from the responding device via port-5353 UDP packets.  NOTE: this may overlap CVE-2015-2809.","status":"published","published":"2017-05-01T01:00:00Z","modified":"2025-12-03T21:57:30.03Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"adp"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T14:33:16.916541Z"}],"euvd":[{"id":"EUVD-2017-15575","description":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive  information from the responding device via port-5353 UDP packets.  NOTE: this may overlap CVE-2015-2809.","status":"published","published":"2017-05-01T01:00:00Z","modified":"2025-12-03T21:57:30Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T19:49:09.83206Z"}],"ghsa":[{"id":"GHSA-6vpj-pr2c-5mm2","title":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with...","description":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive  information from the responding device via port-5353 UDP packets.  NOTE: this may overlap CVE-2015-2809.","status":"published","published":"2022-05-13T01:25:01Z","modified":"2025-04-20T03:38:10Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T15:01:45.743786Z"}],"nvd":[{"id":"CVE-2017-6519","description":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive  information from the responding device via port-5353 UDP packets.  NOTE: this may overlap CVE-2015-2809.","status":"published","published":"2017-05-01T01:59:00.297Z","modified":"2026-06-17T01:22:29.79Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"secondary"},{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":6.4,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-346"],"updated_at":"2026-11-02T14:03:47.848196Z"}],"osv":[{"id":"ALPINE-CVE-2017-6519","description":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive  information from the responding device via port-5353 UDP packets.  NOTE: this may overlap CVE-2015-2809.","status":"published","published":"2017-05-01T01:59:00.297Z","modified":"2026-06-15T18:18:07.016428602Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:27:47.187336Z"},{"id":"AZL-6322","title":"CVE-2017-6519 affecting package avahi for versions less than 0.8-1","description":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive  information from the responding device via port-5353 UDP packets.  NOTE: this may overlap CVE-2015-2809.","status":"published","published":"2017-05-01T01:59:00Z","modified":"2026-04-21T04:32:08.550413Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:28:07.805289Z"},{"id":"BELL-CVE-2017-6519","title":"CVE-2017-6519 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:15:21.713074Z","modified":"2026-01-26T09:46:02.054211Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:28:14.137943Z"},{"id":"CVE-2017-6519","description":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive  information from the responding device via port-5353 UDP packets.  NOTE: this may overlap CVE-2015-2809.","status":"published","published":"2017-05-01T01:59:00.297Z","modified":"2026-10-20T10:49:30.373219079Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:06.412595Z"},{"id":"DEBIAN-CVE-2017-6519","description":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive  information from the responding device via port-5353 UDP packets.  NOTE: this may overlap CVE-2015-2809.","status":"published","published":"2017-05-01T01:59:00.297Z","modified":"2026-09-01T20:02:42.538731978Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:45:29.412243Z"},{"id":"RHSA-2020:1176","title":"Red Hat Security Advisory: avahi security update","status":"published","published":"2024-09-16T03:03:10Z","modified":"2026-06-27T10:09:28Z","cvss":[{"version":"3.0","score":5.8,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T15:53:06.535721Z"},{"id":"UBUNTU-CVE-2017-6519","description":"avahi-daemon in Avahi through 0.6.32 and 0.7 inadvertently responds to IPv6 unicast queries with source addresses that are not on-link, which allows remote attackers to cause a denial of service (traffic amplification) and may cause information leakage by obtaining potentially sensitive information from the responding device via port-5353 UDP packets.  NOTE: this may overlap CVE-2015-2809.","status":"published","published":"2017-04-30T00:00:00Z","modified":"2026-04-22T11:29:47.659239Z","cvss":[{"version":"3.0","score":9.1,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"},{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","level":"critical"}],"updated_at":"2026-11-02T15:54:15.773974Z"},{"id":"MGASA-2019-0081","title":"Updated avahi packages fix security vulnerability","description":"It was found that avahi responds to unicast queries coming from outside of\nlocal network which may cause an information leak, such as disclosing the\ndevice type/model that responds to the request or the operating system.\nThe mDNS response may also be used to amplify denial of service attacks\nagainst other networks as the response size is greater than the size of\nrequest (CVE-2017-6519).\n","status":"published","published":"2019-02-14T08:38:16Z","modified":"2026-04-16T06:22:20.887628947Z","updated_at":"2026-11-02T15:49:40.793816Z"},{"id":"openSUSE-SU-2024:10643-1","title":"avahi-0.8-7.2 on GA media","description":"These are all security issues fixed in the avahi-0.8-7.2 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T02:49:33.342861Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"USN-3876-1","title":"avahi vulnerabilities","description":"Chad Seaman discovered that Avahi incorrectly handled certain messages.\nAn attacker could possibly use this issue to cause a denial of service.\n(CVE-2017-6519, CVE-2018-1000845)\n","status":"published","published":"2019-01-31T11:38:04Z","modified":"2026-04-22T09:53:58.486538Z","updated_at":"2026-11-02T16:58:14.019824Z"}]}}