UBUNTU-CVE-2016-2047

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UBUNTU-CVE-2016-2047

Summary:

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."

References: https://ubuntu.com/security/CVE-2016-2047, https://mariadb.atlassian.net/browse/MDEV-9212, https://github.com/MariaDB/server/commit/f0d774d48416bb06063184380b684380ca005a41, http://marc.info/?l=oss-security&m=145379584107459&w=2, http://www.oracle.com/technetwork/security-advisory/cpuapr2016v3-2985753.html, https://ubuntu.com/security/notices/USN-2953-1, https://ubuntu.com/security/notices/USN-2954-1, https://www.cve.org/CVERecord?id=CVE-2016-2047