{"id":"USN-5008-2","summary":"avahi vulnerability","details":"USN-5008-1 fixed a vulnerability in avahi. This update provides\nthe corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.\n\nOriginal advisory details:\n\n Thomas Kremer discovered that Avahi incorrectly handled termination signals\n on the Unix socket. A local attacker could possibly use this issue to cause\n Avahi to hang, resulting in a denial of service.\n","modified":"2026-06-29T13:48:03.468680157Z","published":"2021-07-07T19:17:47Z","related":["UBUNTU-CVE-2021-3468"],"upstream":["CVE-2021-3468","UBUNTU-CVE-2021-3468"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-5008-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-3468"}],"affected":[{"package":{"name":"avahi","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/avahi?arch=source&distro=trusty%2Fesm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.31-4ubuntu1.3+esm1"}]}],"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","0.6.31-4ubuntu1.3"],"ecosystem_specific":{"binaries":[{"binary_name":"avahi-autoipd","binary_version":"0.6.31-4ubuntu1.3+esm1"},{"binary_version":"0.6.31-4ubuntu1.3+esm1","binary_name":"avahi-daemon"},{"binary_name":"avahi-discover","binary_version":"0.6.31-4ubuntu1.3+esm1"},{"binary_version":"0.6.31-4ubuntu1.3+esm1","binary_name":"avahi-dnsconfd"},{"binary_name":"avahi-ui-utils","binary_version":"0.6.31-4ubuntu1.3+esm1"},{"binary_name":"avahi-utils","binary_version":"0.6.31-4ubuntu1.3+esm1"},{"binary_name":"libavahi-client3","binary_version":"0.6.31-4ubuntu1.3+esm1"},{"binary_name":"libavahi-common-data","binary_version":"0.6.31-4ubuntu1.3+esm1"},{"binary_name":"libavahi-common3","binary_version":"0.6.31-4ubuntu1.3+esm1"},{"binary_version":"0.6.31-4ubuntu1.3+esm1","binary_name":"libavahi-compat-libdnssd1"},{"binary_name":"libavahi-core7","binary_version":"0.6.31-4ubuntu1.3+esm1"},{"binary_name":"libavahi-glib1","binary_version":"0.6.31-4ubuntu1.3+esm1"},{"binary_version":"0.6.31-4ubuntu1.3+esm1","binary_name":"libavahi-gobject0"},{"binary_name":"libavahi-qt4-1","binary_version":"0.6.31-4ubuntu1.3+esm1"},{"binary_version":"0.6.31-4ubuntu1.3+esm1","binary_name":"libavahi-ui-gtk3-0"},{"binary_name":"libavahi-ui0","binary_version":"0.6.31-4ubuntu1.3+esm1"},{"binary_name":"python-avahi","binary_version":"0.6.31-4ubuntu1.3+esm1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:14.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-3468"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5008-2.json"}},{"package":{"name":"avahi","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/avahi?arch=source&distro=esm-infra%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.6.32~rc+dfsg-1ubuntu2.3+esm1"}]}],"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","0.6.32~rc+dfsg-1ubuntu2.3"],"ecosystem_specific":{"binaries":[{"binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1","binary_name":"avahi-autoipd"},{"binary_name":"avahi-daemon","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1"},{"binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1","binary_name":"avahi-discover"},{"binary_name":"avahi-dnsconfd","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1"},{"binary_name":"avahi-ui-utils","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1"},{"binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1","binary_name":"avahi-utils"},{"binary_name":"libavahi-client3","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1"},{"binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1","binary_name":"libavahi-common-data"},{"binary_name":"libavahi-common3","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1"},{"binary_name":"libavahi-compat-libdnssd1","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1"},{"binary_name":"libavahi-core7","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1"},{"binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1","binary_name":"libavahi-glib1"},{"binary_name":"libavahi-gobject0","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1"},{"binary_name":"libavahi-qt4-1","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1"},{"binary_name":"libavahi-ui-gtk3-0","binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1"},{"binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1","binary_name":"libavahi-ui0"},{"binary_version":"0.6.32~rc+dfsg-1ubuntu2.3+esm1","binary_name":"python-avahi"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:16.04:LTS","cves":[{"id":"CVE-2021-3468","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-5008-2.json"}}],"schema_version":"1.7.5"}