{"id":"UBUNTU-CVE-2017-6519","details":"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.","modified":"2026-04-22T12:26:30.597992Z","published":"2017-04-30T00:00:00Z","related":["USN-3876-1","USN-3876-2"],"upstream":["CVE-2017-6519"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2017-6519"},{"type":"REPORT","url":"https://www.secfu.net/advisories"},{"type":"REPORT","url":"https://www.kb.cert.org/vuls/id/550620"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3876-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3876-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2017-6519"}],"affected":[{"package":{"name":"avahi","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/avahi@0.6.31-4ubuntu1.3?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.31-4ubuntu1.3"}]}],"versions":["0.6.31-2ubuntu4","0.6.31-2ubuntu5","0.6.31-3ubuntu1","0.6.31-4ubuntu1","0.6.31-4ubuntu1.1","0.6.31-4ubuntu1.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"avahi-autoipd","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"avahi-daemon","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"avahi-discover","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"avahi-dnsconfd","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"avahi-ui-utils","binary_version":"0.6.31-4ubuntu1.3"},{"binary_version":"0.6.31-4ubuntu1.3","binary_name":"avahi-utils"},{"binary_name":"libavahi-client3","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"libavahi-common-data","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"libavahi-common3","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"libavahi-compat-libdnssd1","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"libavahi-core7","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"libavahi-glib1","binary_version":"0.6.31-4ubuntu1.3"},{"binary_version":"0.6.31-4ubuntu1.3","binary_name":"libavahi-gobject0"},{"binary_name":"libavahi-qt4-1","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"libavahi-ui-gtk3-0","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"libavahi-ui0","binary_version":"0.6.31-4ubuntu1.3"},{"binary_name":"python-avahi","binary_version":"0.6.31-4ubuntu1.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-6519.json"}},{"package":{"name":"avahi","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/avahi@0.6.32~rc+dfsg-1ubuntu2.3?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.32~rc+dfsg-1ubuntu2.3"}]}],"versions":["0.6.31-4ubuntu4","0.6.32~rc+dfsg-1ubuntu2","0.6.32~rc+dfsg-1ubuntu2.1","0.6.32~rc+dfsg-1ubuntu2.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"avahi-autoipd","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"avahi-daemon","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"avahi-discover","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_version":"0.6.32~rc+dfsg-1ubuntu2.3","binary_name":"avahi-dnsconfd"},{"binary_name":"avahi-ui-utils","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"avahi-utils","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"libavahi-client3","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"libavahi-common-data","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"libavahi-common3","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"libavahi-compat-libdnssd1","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"libavahi-core7","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"libavahi-glib1","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"libavahi-gobject0","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"libavahi-qt4-1","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"libavahi-ui-gtk3-0","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"libavahi-ui0","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"},{"binary_name":"python-avahi","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-6519.json"}},{"package":{"name":"avahi","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/avahi@0.7-3.1ubuntu1.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.7-3.1ubuntu1.2"}]}],"versions":["0.6.32-1ubuntu1","0.7-3ubuntu1","0.7-3ubuntu2","0.7-3.1ubuntu1","0.7-3.1ubuntu1.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"avahi-autoipd","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"avahi-daemon","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"avahi-discover","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"avahi-dnsconfd","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"avahi-ui-utils","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"avahi-utils","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"gir1.2-avahi-0.6","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"libavahi-client3","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"libavahi-common-data","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"libavahi-common3","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"libavahi-compat-libdnssd1","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"libavahi-core7","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"libavahi-glib1","binary_version":"0.7-3.1ubuntu1.2"},{"binary_name":"libavahi-gobject0","binary_version":"0.7-3.1ubuntu1.2"},{"binary_version":"0.7-3.1ubuntu1.2","binary_name":"libavahi-ui-gtk3-0"},{"binary_name":"python-avahi","binary_version":"0.7-3.1ubuntu1.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2017/UBUNTU-CVE-2017-6519.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"low"}]}