You’ve just upgraded to Oracle Database 12c – but your favorite admin tool receives an ORA-1031: Insufficient Privileges after connection?
Then the reason may be the reduced set of privileges for the SELECT ANY DICTIONARY privilege. This privilege does not allow access to tables USER$, ENC$ and DEFAULT_PWD$, LINK$, USER_HISTORY$, CDB_LOCAL_ADMINAUTH$, and XS$VERIFIERS. Actually such changes are not new. For instance in Oracle 10.1 we removed the access to LINK$ in SELECT ANY DICTIONARY (well, this may have happened because the dblink’s password was stored in clear text in LINK$ – a misbehavior which is fixed since …
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