Ifyou get following message during server upgrade:
mysql-5.5 (5.5.33+dfsg-0+wheezy1) wheezy-security; urgency=high
mysql-server-5.5 ships with the upstream mysql_install_db script which
creates a database "test" and sets up permissions that allow anonymous
access, without a password, from localhost to the "test" database and
any databases starting with "test_" that users might have created
after installing mysql-server.
During the migration of mysql-5.1 to mysql-5.5 in Debian the patches
to drop these permissions and the creation of the test databases were
not applied. This update resolves this issue for new installations of
If you are updating from a previous version of mysql-5.5 it is
recommended to check your installation and to drop these privileges
and databases manually.
Further information can be found at the MySQL 5.5 Reference Manual.
-- Salvatore Bonaccorso <email@example.com> Sat, 14 Dec 2013 22:15:25 +0100
Then you have to run following command to secure and restrict your Database aceess.
NOTE: RUNNING ALL PARTS OF THIS SCRIPT IS RECOMMENDED FOR ALL MySQL
SERVERS IN PRODUCTION USE! PLEASE READ EACH STEP CAREFULLY!
In order to log into MySQL to secure it, we'll need the current
password for the root user. If you've just installed MySQL, and
you haven't set the root password yet, the password will be blank,
so you should just press enter here.
Enter current password for root (enter for none):
OK, successfully used password, moving on...
Setting the root password ensures that nobody can log into the MySQL
root user without the proper authorisation.
You already have a root password set, so you can safely answer 'n'.
Change the root password? [Y/n] n
By default, a MySQL installation has an anonymous user, allowing anyone
to log into MySQL without having to have a user account created for
them. This is intended only for testing, and to make the installation
go a bit smoother. You should remove them before moving into a
Remove anonymous users? [Y/n] Y
Normally, root should only be allowed to connect from 'localhost'. This
ensures that someone cannot guess at the root password from the network.
Disallow root login remotely? [Y/n] Y
By default, MySQL comes with a database named 'test' that anyone can
access. This is also intended only for testing, and should be removed
before moving into a production environment.
Remove test database and access to it? [Y/n] Y
- Dropping test database...
- Removing privileges on test database...
Reloading the privilege tables will ensure that all changes made so far
will take effect immediately.
Reload privilege tables now? [Y/n] Y
All done! If you've completed all of the above steps, your MySQL
installation should now be secure.
Thanks for using MySQL!
The test Database will be deleted and also the anoymous user access from the localhost.