Edit File: mysql_secure_installation
#!/bin/sh # Copyright (c) 2002, 2016, Oracle and/or its affiliates. All rights reserved. # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; version 2 of the License. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA config=".my.cnf.$$" command=".mysql.$$" mysql_client="" trap "interrupt" 1 2 3 6 15 rootpass="" echo_n= echo_c= set_echo_compat() { case `echo "testing\c"`,`echo -n testing` in *c*,-n*) echo_n= echo_c= ;; *c*,*) echo_n=-n echo_c= ;; *) echo_n= echo_c='\c' ;; esac } validate_reply () { ret=0 if [ -z "$1" ]; then reply=y return $ret fi case $1 in y|Y|yes|Yes|YES) reply=y ;; n|N|no|No|NO) reply=n ;; *) ret=1 ;; esac return $ret } prepare() { touch $config $command chmod 600 $config $command } find_mysql_client() { for n in ./bin/mysql mysql do $n --no-defaults --help > /dev/null 2>&1 status=$? if test $status -eq 0 then mysql_client=$n return fi done echo "Can't find a 'mysql' client in PATH or ./bin" exit 1 } do_query() { echo "$1" >$command #sed 's,^,> ,' < $command # Debugging $mysql_client --defaults-file=$config <$command return $? } # Simple escape mechanism (\-escape any ' and \), suitable for two contexts: # - single-quoted SQL strings # - single-quoted option values on the right hand side of = in my.cnf # # These two contexts don't handle escapes identically. SQL strings allow # quoting any character (\C => C, for any C), but my.cnf parsing allows # quoting only \, ' or ". For example, password='a\b' quotes a 3-character # string in my.cnf, but a 2-character string in SQL. # # This simple escape works correctly in both places. basic_single_escape () { # The quoting on this sed command is a bit complex. Single-quoted strings # don't allow *any* escape mechanism, so they cannot contain a single # quote. The string sed gets (as argv[1]) is: s/\(['\]\)/\\\1/g # # Inside a character class, \ and ' are not special, so the ['\] character # class is balanced and contains two characters. echo "$1" | sed 's/\(['"'"'\]\)/\\\1/g' } make_config() { echo "# mysql_secure_installation config file" >$config echo "[mysql]" >>$config echo "user=root" >>$config esc_pass=`basic_single_escape "$rootpass"` echo "password='$esc_pass'" >>$config #sed 's,^,> ,' < $config # Debugging } get_root_password() { status=1 while [ $status -eq 1 ]; do stty -echo echo $echo_n "Enter current password for root (enter for none): $echo_c" read password echo stty echo if [ "x$password" = "x" ]; then hadpass=0 else hadpass=1 fi rootpass=$password make_config do_query "" status=$? done echo "OK, successfully used password, moving on..." echo } set_root_password() { stty -echo echo $echo_n "New password: $echo_c" read password1 echo echo $echo_n "Re-enter new password: $echo_c" read password2 echo stty echo if [ "$password1" != "$password2" ]; then echo "Sorry, passwords do not match." echo return 1 fi if [ "$password1" = "" ]; then echo "Sorry, you can't use an empty password here." echo return 1 fi esc_pass=`basic_single_escape "$password1"` do_query "UPDATE mysql.user SET Password=PASSWORD('$esc_pass') WHERE User='root';" if [ $? -eq 0 ]; then echo "Password updated successfully!" echo "Reloading privilege tables.." reload_privilege_tables if [ $? -eq 1 ]; then clean_and_exit fi echo rootpass=$password1 make_config else echo "Password update failed!" clean_and_exit fi return 0 } remove_anonymous_users() { do_query "DELETE FROM mysql.user WHERE User='';" if [ $? -eq 0 ]; then echo " ... Success!" else echo " ... Failed!" clean_and_exit fi return 0 } remove_remote_root() { do_query "DELETE FROM mysql.user WHERE User='root' AND Host NOT IN ('localhost', '127.0.0.1', '::1');" if [ $? -eq 0 ]; then echo " ... Success!" else echo " ... Failed!" fi } remove_test_database() { echo " - Dropping test database..." do_query "DROP DATABASE test;" if [ $? -eq 0 ]; then echo " ... Success!" else echo " ... Failed! Not critical, keep moving..." fi echo " - Removing privileges on test database..." do_query "DELETE FROM mysql.db WHERE Db='test' OR Db='test\\_%'" if [ $? -eq 0 ]; then echo " ... Success!" else echo " ... Failed! Not critical, keep moving..." fi return 0 } reload_privilege_tables() { do_query "FLUSH PRIVILEGES;" if [ $? -eq 0 ]; then echo " ... Success!" return 0 else echo " ... Failed!" return 1 fi } interrupt() { echo echo "Aborting!" echo cleanup stty echo exit 1 } cleanup() { echo "Cleaning up..." rm -f $config $command } # Remove the files before exiting. clean_and_exit() { cleanup exit 1 } # The actual script starts here prepare find_mysql_client set_echo_compat echo echo echo echo echo "NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL" echo " SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!" echo echo echo "In order to log into MySQL to secure it, we'll need the current" echo "password for the root user. If you've just installed MySQL, and" echo "you haven't set the root password yet, the password will be blank," echo "so you should just press enter here." echo get_root_password # # Set the root password # echo "Setting the root password ensures that nobody can log into the MySQL" echo "root user without the proper authorisation." echo while true ; do if [ $hadpass -eq 0 ]; then echo $echo_n "Set root password? [Y/n] $echo_c" else echo "You already have a root password set, so you can safely answer 'n'." echo echo $echo_n "Change the root password? [Y/n] $echo_c" fi read reply validate_reply $reply && break done if [ "$reply" = "n" ]; then echo " ... skipping." else status=1 while [ $status -eq 1 ]; do set_root_password status=$? done fi echo # # Remove anonymous users # echo "By default, a MySQL installation has an anonymous user, allowing anyone" echo "to log into MySQL without having to have a user account created for" echo "them. This is intended only for testing, and to make the installation" echo "go a bit smoother. You should remove them before moving into a" echo "production environment." echo while true ; do echo $echo_n "Remove anonymous users? [Y/n] $echo_c" read reply validate_reply $reply && break done if [ "$reply" = "n" ]; then echo " ... skipping." else remove_anonymous_users fi echo # # Disallow remote root login # echo "Normally, root should only be allowed to connect from 'localhost'. This" echo "ensures that someone cannot guess at the root password from the network." echo while true ; do echo $echo_n "Disallow root login remotely? [Y/n] $echo_c" read reply validate_reply $reply && break done if [ "$reply" = "n" ]; then echo " ... skipping." else remove_remote_root fi echo # # Remove test database # echo "By default, MySQL comes with a database named 'test' that anyone can" echo "access. This is also intended only for testing, and should be removed" echo "before moving into a production environment." echo while true ; do echo $echo_n "Remove test database and access to it? [Y/n] $echo_c" read reply validate_reply $reply && break done if [ "$reply" = "n" ]; then echo " ... skipping." else remove_test_database fi echo # # Reload privilege tables # echo "Reloading the privilege tables will ensure that all changes made so far" echo "will take effect immediately." echo while true ; do echo $echo_n "Reload privilege tables now? [Y/n] $echo_c" read reply validate_reply $reply && break done if [ "$reply" = "n" ]; then echo " ... skipping." else reload_privilege_tables fi echo cleanup echo echo echo echo "All done! If you've completed all of the above steps, your MySQL" echo "installation should now be secure." echo echo "Thanks for using MySQL!" echo echo
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