{"id":"UBUNTU-CVE-2018-14644","details":"An issue has been found in PowerDNS Recursor from 4.0.0 up to and including 4.1.4. A remote attacker sending a DNS query for a meta-type like OPT can lead to a zone being wrongly cached as failing DNSSEC validation. It only arises if the parent zone is signed, and all the authoritative servers for that parent zone answer with FORMERR to a query for at least one of the meta-types. As a result, subsequent queries from clients requesting DNSSEC validation will be answered with a ServFail.","modified":"2026-02-04T03:42:51.857462Z","published":"2018-11-09T19:29:00Z","related":["USN-7203-1"],"upstream":["CVE-2018-14644"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2018-14644"},{"type":"REPORT","url":"https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2018-07.html"},{"type":"REPORT","url":"https://downloads.powerdns.com/patches/2018-07/"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2018-14644"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7203-1"}],"affected":[{"package":{"name":"pdns-recursor","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/pdns-recursor@4.0.0~alpha2-2ubuntu0.1+esm1?arch=source&distro=esm-apps/xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.0~alpha2-2ubuntu0.1+esm1"}]}],"versions":["3.7.3-1","4.0.0~alpha1-1","4.0.0~alpha1-2","4.0.0~alpha2-2","4.0.0~alpha2-2ubuntu0.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"4.0.0~alpha2-2ubuntu0.1+esm1","binary_name":"pdns-recursor"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-14644.json"}},{"package":{"name":"pdns-recursor","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/pdns-recursor@4.1.1-2ubuntu0.1~esm1?arch=source&distro=esm-apps/bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.1-2ubuntu0.1~esm1"}]}],"versions":["4.0.6-1","4.0.6-1build1","4.0.7-1","4.1.1-1","4.1.1-1build1","4.1.1-2"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_version":"4.1.1-2ubuntu0.1~esm1","binary_name":"pdns-recursor"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2018/UBUNTU-CVE-2018-14644.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}]}