I'm using MySQL as the db for Drupal (PHP based CMS), on shared hosting. There 
are repeated errors because the db user does not have permission for LOCK 
TABLES, which Drupal uses.

The ISP says that they don't grant this permission because ...

"MySQL has a bug which allows users with GrantTables* the ability to view the 
Database names of all other databases on the server. Whilst the users can not 
see any other data, knowing the names of tables can facilitate attacks."

(* = I assume they meant 'Lock Tables')

However I can't find any mention of this in the bugs db, nor is it listed in 
the manual as a side effect of granting 'lock tables' permissions.

Does anyone know if it is a bug or not? Does anyone know whether LOCK TABLES 
really is a security risk in a shared server / multi-user environment?

TIA,
James Harvard

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