Oracle 5.0 Reference Manual page 1712

MySQL Cluster Security Issues
Note
Many of the MySQL Cluster utilities such as ndb_show_tables, ndb_desc,
and also work without authentication and can reveal table
ndb_select_all
names, schemas, and data. By default these are installed on Unix-style systems
with the permissions (755), which means they can be executed by
wxr-xr-x
any user that can access the directory.
mysql/bin
See Section 17.4, "MySQL Cluster Programs", for more information about these
utilities.
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