emca -config dbcontrol db -repos recreate
CONFIG: ORA-28003: password verification for the specified password failed
ORA-20003: Password should contain at least one

Fixed by the following steps:
---------update default profile begin ------
alter profile default limit
password_verify_function null;
select resource_name, resource_type, limit from dba_profiles where resource_name='PASSWORD_VERIFY_FUNCTION';

RESOURCE_NAME RESOURCE LIMIT
-------------------------------- -------- --------------------------
PASSWORD_VERIFY_FUNCTION PASSWORD NULL

---------update default profile end ------