7.3 Ensure Passwords Are Not Stored in the Global Configuration - /etc/mysql/my.cnf
The [client] section of the MySQL configuration file allows setting a user and password to be used. Verify the password option is not used in the global configuration file (my.cnf). Rationale: Using the password parameter may negatively impact the confidentiality of the user's password.
Use the mysql_config_editor to store authentication credentials in .mylogin.cnf in encrypted form. If not possible, use the user-specific options file, .my.cnf., and restricting file access permissions to the user identity.