CVE-2016-2047

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.”

Bugs

• <https://bugs.launchpad.net/ubuntu/+source/mariadb-5.5/+bug/1524704&gt;
• <https://bugs.launchpad.net/ubuntu/+source/mariadb-10.0/+bug/1538315&gt;