Investigation of Default Oracle Accounts

and Windows NT for version 8.1.5 and

have found the following possible default accounts and passwords that could be installed. I have installed the standard
RDBMS and development tools. This gives us 9 default accounts under Linux and 12 under Windows NT.
The Windows NT installation is more dangerous as it provides a DBA account with the user CTXSYS and also the user
MDSYS has "ALL PRIVILEGES WITH ADMIN" granted. Having "ALL PRIVILEGES" is as good as having dba
privileges. None of the Linux default users is as dangerous as this, except of course SYS and SYSTEM if the passwords
have been left set to the defaults