In theory, you could use the copydb tool:
http://www.cubrid.org/manual/840/en/Copying%7CMoving%20Database
But this does not do a "clone", but a "copy"! :)
What's the difference...? Well, the "name"! :)
A "clone" must have the same name as the original, right...? But copydb requires by default a different destination database name, at least when the copy is being done on the same machine/server.
So in order to get a perfect "clone", you definitely need to use the copydb AND specify the destination on a different machine/server.
On the same machine, all you can get is a "copy" of the database - the name obviously will be different, so it's not a perfect "clone"...
Hope is clear... :)