':return: True if the remote web application verifies the Referer before
processing the HTTP request.'

def _is_origin_checked(self, freq, orig_response):

    fake_ref = 'http://www.w3af.org/'
    mutant = HeadersMutant(copy.deepcopy(freq))
    headers = mutant.get_dc()
    headers['Referer'] = fake_ref
    mutant.set_token(('Referer',))
    mutant_response = self._uri_opener.send_mutant(mutant)
    if (not self._is_resp_equal(orig_response, mutant_response)):
        return True
    return False
