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This is a bugfix release for the MySQL 4.1 release family.
Functionality Added or Changed
Security Enhancement: To enable stricter control over the location from which user-defined functions can be loaded, the
plugin_dir system variable has been backported from MySQL 5.1. If the value is nonempty, user-defined function object files can be loaded only from the directory named by this variable. If the value is empty, the behavior that is used prior to the inclusion of
plugin_dir applies: The UDF object files must be located in a directory that is searched by your system's dynamic linker.
If the plugin directory is writable by the server, it may be possible for a user to write executable code to a file in the directory using
SELECT ... INTO DUMPFILE. This can be prevented by making
plugin_dir read only to the server or by setting
--secure-file-priv to a directory where
SELECT writes can be made safely. (Bug #37428)
Security Fix; Important Change: Additional corrections were made for the symlink-related privilege problem originally addressed in MySQL 4.1.24. The original fix did not correctly handle the data directory path name if it contained symlinked directories in its path, and the check was made only at table-creation time, not at table-opening time later. (Bug #32167, CVE-2008-2079)
References: See also Bug #39277.
On Windows, the installer attempted to use JScript to determine whether the target data directory already existed. On Windows Vista x64, this resulted in an error because the installer was attempting to run the JScript in a 32-bit engine, which wasn't registered on Vista. The installer no longer uses JScript but instead relies on a native WiX command. (Bug #36103)
The Windows installer displayed incorrect product names in some images. (Bug #40845)
INSERT INTO ... SELECT caused a crash if
innodb_locks_unsafe_for_binlog was enabled. (Bug #27294)
The MySQL Instance Configuration Wizard would not permit you to choose a service name, even though the criteria for the service name were valid. The code that checks the name has been updated to support the correct criteria of any string less than 256 character and not containing either a forward or backward slash character. (Bug #27013)