{"id":"UBUNTU-CVE-2016-2047","details":"The ssl_verify_server_cert function in sql-common/client.c in MariaDB before 5.5.47, 10.0.x before 10.0.23, and 10.1.x before 10.1.10; Oracle MySQL 5.5.48 and earlier, 5.6.29 and earlier, and 5.7.11 and earlier; and Percona Server do not properly verify that the server hostname matches a domain name in the subject's Common Name (CN) or subjectAltName field of the X.509 certificate, which allows man-in-the-middle attackers to spoof SSL servers via a \"/CN=\" string in a field in a certificate, as demonstrated by \"/OU=/CN=bar.com/CN=foo.com.\"","modified":"2026-04-22T11:00:07.773633Z","published":"2016-01-27T00:00:00Z","related":["USN-2953-1","USN-2954-1"],"upstream":["CVE-2016-2047"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2016-2047"},{"type":"REPORT","url":"https://mariadb.atlassian.net/browse/MDEV-9212"},{"type":"REPORT","url":"https://github.com/MariaDB/server/commit/f0d774d48416bb06063184380b684380ca005a41"},{"type":"REPORT","url":"http://marc.info/?l=oss-security&m=145379584107459&w=2"},{"type":"REPORT","url":"http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2953-1"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-2954-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2016-2047"}],"affected":[{"package":{"name":"mariadb-5.5","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/mariadb-5.5@5.5.47-1ubuntu0.14.04.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.5.47-1ubuntu0.14.04.1"}]}],"versions":["5.5.32-1ubuntu1","5.5.35-1ubuntu1","5.5.36-1","5.5.37-0ubuntu0.14.04.1","5.5.39-0ubuntu0.14.04.1","5.5.40-0ubuntu0.14.04.1","5.5.41-0ubuntu0.14.04.2","5.5.41-1ubuntu0.14.04.1","5.5.43-1ubuntu0.14.04.2","5.5.44-1ubuntu0.14.04.1","5.5.46-1ubuntu0.14.04.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libmariadbclient18","binary_version":"5.5.47-1ubuntu0.14.04.1"},{"binary_name":"mariadb-client","binary_version":"5.5.47-1ubuntu0.14.04.1"},{"binary_name":"mariadb-client-5.5","binary_version":"5.5.47-1ubuntu0.14.04.1"},{"binary_name":"mariadb-client-core-5.5","binary_version":"5.5.47-1ubuntu0.14.04.1"},{"binary_name":"mariadb-common","binary_version":"5.5.47-1ubuntu0.14.04.1"},{"binary_name":"mariadb-server","binary_version":"5.5.47-1ubuntu0.14.04.1"},{"binary_name":"mariadb-server-5.5","binary_version":"5.5.47-1ubuntu0.14.04.1"},{"binary_name":"mariadb-server-core-5.5","binary_version":"5.5.47-1ubuntu0.14.04.1"},{"binary_name":"mariadb-test","binary_version":"5.5.47-1ubuntu0.14.04.1"},{"binary_name":"mariadb-test-5.5","binary_version":"5.5.47-1ubuntu0.14.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2047.json"}},{"package":{"name":"mysql-5.5","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/mysql-5.5@5.5.49-0ubuntu0.14.04.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.5.49-0ubuntu0.14.04.1"}]}],"versions":["5.5.32-0ubuntu7","5.5.34-0ubuntu1","5.5.34-0ubuntu2","5.5.35-0ubuntu1","5.5.35+dfsg-1ubuntu1","5.5.37-0ubuntu0.14.04.1","5.5.38-0ubuntu0.14.04.1","5.5.40-0ubuntu0.14.04.1","5.5.41-0ubuntu0.14.04.1","5.5.43-0ubuntu0.14.04.1","5.5.44-0ubuntu0.14.04.1","5.5.46-0ubuntu0.14.04.2","5.5.47-0ubuntu0.14.04.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libmysqlclient18","binary_version":"5.5.49-0ubuntu0.14.04.1"},{"binary_name":"libmysqld-pic","binary_version":"5.5.49-0ubuntu0.14.04.1"},{"binary_name":"mysql-client","binary_version":"5.5.49-0ubuntu0.14.04.1"},{"binary_name":"mysql-client-5.5","binary_version":"5.5.49-0ubuntu0.14.04.1"},{"binary_name":"mysql-client-core-5.5","binary_version":"5.5.49-0ubuntu0.14.04.1"},{"binary_name":"mysql-common","binary_version":"5.5.49-0ubuntu0.14.04.1"},{"binary_name":"mysql-server","binary_version":"5.5.49-0ubuntu0.14.04.1"},{"binary_name":"mysql-server-5.5","binary_version":"5.5.49-0ubuntu0.14.04.1"},{"binary_name":"mysql-server-core-5.5","binary_version":"5.5.49-0ubuntu0.14.04.1"},{"binary_name":"mysql-source-5.5","binary_version":"5.5.49-0ubuntu0.14.04.1"},{"binary_name":"mysql-testsuite","binary_version":"5.5.49-0ubuntu0.14.04.1"},{"binary_name":"mysql-testsuite-5.5","binary_version":"5.5.49-0ubuntu0.14.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2047.json"}},{"package":{"name":"mysql-5.6","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/mysql-5.6@5.6.30-0ubuntu0.14.04.1?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.6.30-0ubuntu0.14.04.1"}]}],"versions":["5.6.15-0ubuntu1","5.6.15-1~exp2","5.6.16-1~exp1","5.6.17-0ubuntu0.14.04.1","5.6.19-0ubuntu0.14.04.1","5.6.27-0ubuntu0.14.04.1","5.6.28-0ubuntu0.14.04.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"mysql-client-5.6","binary_version":"5.6.30-0ubuntu0.14.04.1"},{"binary_name":"mysql-client-core-5.6","binary_version":"5.6.30-0ubuntu0.14.04.1"},{"binary_name":"mysql-common-5.6","binary_version":"5.6.30-0ubuntu0.14.04.1"},{"binary_name":"mysql-server-5.6","binary_version":"5.6.30-0ubuntu0.14.04.1"},{"binary_name":"mysql-server-core-5.6","binary_version":"5.6.30-0ubuntu0.14.04.1"},{"binary_name":"mysql-source-5.6","binary_version":"5.6.30-0ubuntu0.14.04.1"},{"binary_name":"mysql-testsuite-5.6","binary_version":"5.6.30-0ubuntu0.14.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2047.json"}},{"package":{"name":"mysql-5.7","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/mysql-5.7@5.7.12-0ubuntu1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.7.12-0ubuntu1"}]}],"versions":["5.7.11-0ubuntu4","5.7.11-0ubuntu5","5.7.11-0ubuntu6"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libmysqlclient20","binary_version":"5.7.12-0ubuntu1"},{"binary_name":"mysql-client","binary_version":"5.7.12-0ubuntu1"},{"binary_name":"mysql-client-5.7","binary_version":"5.7.12-0ubuntu1"},{"binary_name":"mysql-client-core-5.7","binary_version":"5.7.12-0ubuntu1"},{"binary_name":"mysql-common","binary_version":"5.7.12-0ubuntu1"},{"binary_name":"mysql-server","binary_version":"5.7.12-0ubuntu1"},{"binary_name":"mysql-server-5.7","binary_version":"5.7.12-0ubuntu1"},{"binary_name":"mysql-server-core-5.7","binary_version":"5.7.12-0ubuntu1"},{"binary_name":"mysql-source-5.7","binary_version":"5.7.12-0ubuntu1"},{"binary_name":"mysql-testsuite","binary_version":"5.7.12-0ubuntu1"},{"binary_name":"mysql-testsuite-5.7","binary_version":"5.7.12-0ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2047.json"}},{"package":{"name":"percona-xtradb-cluster-5.6","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/percona-xtradb-cluster-5.6@5.6.34-26.19-0ubuntu0.16.04.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.6.34-26.19-0ubuntu0.16.04.1"}]}],"versions":["5.6.21-25.8-0ubuntu2","5.6.21-25.8-0ubuntu3","5.6.21-25.8-0ubuntu3.1","5.6.21-25.8-0ubuntu3.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"percona-xtradb-cluster-server","binary_version":"5.6.34-26.19-0ubuntu0.16.04.1"},{"binary_name":"percona-xtradb-cluster-server-5.6","binary_version":"5.6.34-26.19-0ubuntu0.16.04.1"},{"binary_name":"percona-xtradb-cluster-source-5.6","binary_version":"5.6.34-26.19-0ubuntu0.16.04.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2047.json"}},{"package":{"name":"percona-server-5.6","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/percona-server-5.6@5.6.22-rel71.0-0ubuntu4.1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.6.22-rel71.0-0ubuntu2","5.6.22-rel71.0-0ubuntu4","5.6.22-rel71.0-0ubuntu4.1"],"ecosystem_specific":{"binaries":[{"binary_name":"percona-server-server","binary_version":"5.6.22-rel71.0-0ubuntu4.1"},{"binary_name":"percona-server-server-5.6","binary_version":"5.6.22-rel71.0-0ubuntu4.1"},{"binary_name":"percona-server-source-5.6","binary_version":"5.6.22-rel71.0-0ubuntu4.1"},{"binary_name":"percona-server-test","binary_version":"5.6.22-rel71.0-0ubuntu4.1"},{"binary_name":"percona-server-test-5.6","binary_version":"5.6.22-rel71.0-0ubuntu4.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-2047.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]}