{"id":"UBUNTU-CVE-2019-3814","details":"It was discovered that Dovecot before versions 2.2.36.1 and 2.3.4.1 incorrectly handled client certificates. A remote attacker in possession of a valid certificate with an empty username field could possibly use this issue to impersonate other users.","modified":"2026-04-22T13:47:06.862928Z","published":"2019-02-05T13:00:00Z","related":["USN-3881-1","USN-3881-2"],"upstream":["CVE-2019-3814"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2019-3814"},{"type":"REPORT","url":"https://www.dovecot.org/pipermail/dovecot/2019-February/114575.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3881-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-3881-2"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2019-3814"}],"affected":[{"package":{"name":"dovecot","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/dovecot@1:2.2.9-1ubuntu2.5?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.2.9-1ubuntu2.5"}]}],"versions":["1:2.1.7-7ubuntu3","1:2.2.9-1ubuntu1","1:2.2.9-1ubuntu2","1:2.2.9-1ubuntu2.1","1:2.2.9-1ubuntu2.3","1:2.2.9-1ubuntu2.4"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"dovecot-core","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"dovecot-gssapi","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"dovecot-imapd","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"dovecot-ldap","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"dovecot-lmtpd","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"dovecot-managesieved","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"dovecot-mysql","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"dovecot-pgsql","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"dovecot-pop3d","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"dovecot-sieve","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"dovecot-solr","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"dovecot-sqlite","binary_version":"1:2.2.9-1ubuntu2.5"},{"binary_name":"mail-stack-delivery","binary_version":"1:2.2.9-1ubuntu2.5"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-3814.json"}},{"package":{"name":"dovecot","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/dovecot@1:2.2.22-1ubuntu2.9?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.2.22-1ubuntu2.9"}]}],"versions":["1:2.2.18-2ubuntu2","1:2.2.22-1ubuntu1","1:2.2.22-1ubuntu2","1:2.2.22-1ubuntu2.1","1:2.2.22-1ubuntu2.2","1:2.2.22-1ubuntu2.3","1:2.2.22-1ubuntu2.4","1:2.2.22-1ubuntu2.6","1:2.2.22-1ubuntu2.7","1:2.2.22-1ubuntu2.8"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"dovecot-core","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-gssapi","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-imapd","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-ldap","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-lmtpd","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-lucene","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-managesieved","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-mysql","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-pgsql","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-pop3d","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-sieve","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-solr","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"dovecot-sqlite","binary_version":"1:2.2.22-1ubuntu2.9"},{"binary_name":"mail-stack-delivery","binary_version":"1:2.2.22-1ubuntu2.9"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-3814.json"}},{"package":{"name":"dovecot","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/dovecot@1:2.2.33.2-1ubuntu4.2?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:2.2.33.2-1ubuntu4.2"}]}],"versions":["1:2.2.27-3ubuntu1","1:2.2.33.2-1ubuntu1","1:2.2.33.2-1ubuntu2","1:2.2.33.2-1ubuntu3","1:2.2.33.2-1ubuntu4","1:2.2.33.2-1ubuntu4.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"dovecot-core","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"dovecot-gssapi","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"dovecot-imapd","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"dovecot-ldap","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"dovecot-lmtpd","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"dovecot-managesieved","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"dovecot-mysql","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"dovecot-pgsql","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"dovecot-pop3d","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"dovecot-sieve","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"dovecot-solr","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"dovecot-sqlite","binary_version":"1:2.2.33.2-1ubuntu4.2"},{"binary_name":"mail-stack-delivery","binary_version":"1:2.2.33.2-1ubuntu4.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2019/UBUNTU-CVE-2019-3814.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:N"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}