{"id":"UBUNTU-CVE-2020-8618","details":"An attacker who is permitted to send zone data to a server via zone transfer can exploit this to intentionally trigger the assertion failure with a specially constructed zone, denying service to clients.","modified":"2026-02-04T03:47:03.026086Z","published":"2020-06-17T00:00:00Z","related":["USN-4399-1"],"upstream":["CVE-2020-8618"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2020-8618"},{"type":"REPORT","url":"https://kb.isc.org/docs/cve-2020-8618"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-4399-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2020-8618"}],"affected":[{"package":{"name":"bind9","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/bind9@1:9.16.1-0ubuntu2.2?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.16.1-0ubuntu2.2"}]}],"versions":["1:9.11.5.P4+dfsg-5.1ubuntu2","1:9.11.5.P4+dfsg-5.1ubuntu3","1:9.11.5.P4+dfsg-5.1ubuntu4","1:9.11.5.P4+dfsg-5.1ubuntu5","1:9.11.14+dfsg-1ubuntu1","1:9.11.14+dfsg-3ubuntu1","1:9.16.0-1ubuntu3","1:9.16.0-1ubuntu4","1:9.16.0-1ubuntu5","1:9.16.1-0ubuntu1","1:9.16.1-0ubuntu2","1:9.16.1-0ubuntu2.1"],"ecosystem_specific":{"binaries":[{"binary_version":"1:9.16.1-0ubuntu2.2","binary_name":"bind9"},{"binary_version":"1:9.16.1-0ubuntu2.2","binary_name":"bind9-dnsutils"},{"binary_version":"1:9.16.1-0ubuntu2.2","binary_name":"bind9-host"},{"binary_version":"1:9.16.1-0ubuntu2.2","binary_name":"bind9-libs"},{"binary_version":"1:9.16.1-0ubuntu2.2","binary_name":"bind9-utils"},{"binary_version":"1:9.16.1-0ubuntu2.2","binary_name":"bind9utils"},{"binary_version":"1:9.16.1-0ubuntu2.2","binary_name":"dnsutils"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2020/UBUNTU-CVE-2020-8618.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}