MySQL client programs now support an
--ssl-modeoption that enables you to specify the security state of the connection to the server. If the option is not specified, the default value is
DISABLED(establish an unencrypted connection).
--ssl-mode=REQUIREDcan be specified to require a secure connection, or fail if a secure connection cannot be obtained.
These clients support
--ssl-mode: mysql, mysqladmin, mysqlcheck, mysqldump, mysqlimport, mysqlshow, mysqlpump, mysqlslap, mysqltest, mysql_upgrade.
For more information, see Command Options for Secure Connections.Note
In MySQL 5.7 and higher, the C client library provides native support for requiring encrypted connections: call the
mysql_options()C API function, passing the
MYSQL_OPT_SSL_MODEoption with a value of
SSL_MODE_REQUIRED. In MySQL 5.5, the client library provides no such support because doing so would break binary compatibility with previous library versions within the series. Clients that require encrypted connections must implement the logic themselves.
To require encrypted connections in MySQL 5.5, the standard MySQL client programs use this technique: If
--ssl-mode=REQUIREDwas specified, the client program turns on SSL, connects to the server, and checks whether the resulting connection is encrypted. If not, the client exits with an error. Third-party applications that must be able to require encrypted connections can use the same technique. For details, see mysql_ssl_set().
REPLACEoperations on multiple connections resulted in a hang. (Bug #22530768, Bug #79185)
Replication: The test case
main.mergefailed when the variables
binlog_formatwas set to “
ROW,” as the server tried to get information for table creation for a child table before it was opened. With this fix, the server skips getting information for the table in the situation. (Bug #20574550, Bug #75976)
MySQL did not build with GCC 5. (Bug #22680706)
The System-V initialization script for RHEL6 or older failed to enable the
mysqldservice by default. (Bug #22600974)
Improper host name checking in X509 certificates could permit man-in-the-middle attacks. (Bug #22295186, Bug #22738607)
A boolean mode full-text search caused a segmentation fault. (Bug #22176795)
Concurrent selecting and flushing of a
FEDERATEDtable while killing connections accessing it could result in a server exit. (Bug #21918190)
GRANT PROXYstatements after altering the definition of the
mysql.usersystem table could result in a server exit. (Bug #21699037)
Certain error messages included part of the SQL statement that produced them, possibly exposing data. (Bug #21682356)
Character set conversion operations on
NULLparameters to prepared statements could cause a server exit. (Bug #18823979)
CREATE TABLE ... SELECTcould create a table with a column of type
NULL, which when accessed caused a server exit. (Bug #14021323, Bug #23280699)
References: See also: Bug #23135731.
Processlist state information was not updated correctly for
LOAD DATA INFILEand could show a state different from
executing. (Bug #69375, Bug #16912362)