Which privileges are needed to execute DBMS_REDEFINITION package?

Execute privileges on the DBMS_REDEFINITION package are granted to EXECUTE_CATALOG_ROLE.

In addition to having execute privileges on this package, you must be granted the following privileges:

CREATE ANY TABLE

ALTER ANY TABLE

DROP ANY TABLE

LOCK ANY TABLE

SELECT ANY TABLE

In addition, the following privileges are required to execute COPY_TABLE_DEPENDENTS procedure:

CREATE ANY TRIGGER

CREATE ANY INDEX

Source: Oracle Documentation