Language: Go
Label: vulnerable
CWE: CWE-770 \u2014 Allocation of Resources Without Limits or Throttling
The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.

Code:
func (sp *ServiceProvider) ValidateLogoutResponseRedirect(queryParameterData string) error {
	retErr := &InvalidResponseError{
		Now: TimeNow(),
	}

	rawResponseBuf, err := base64.StdEncoding.DecodeString(queryParameterData)
	if err != nil {
		retErr.PrivateErr = fmt.Errorf("unable to parse base64: %s", err)
		return retErr
	}
	retErr.Response = string(rawResponseBuf)

	gr, err := ioutil.ReadAll(flate.NewReader(bytes.NewBuffer(rawResponseBuf)))
	if err != nil {
		retErr.PrivateErr = err
		return retErr
	}

	if err := xrv.Validate(bytes.NewReader(gr)); err != nil {
		return err
	}

	doc := etree.NewDocument()
	if err := doc.ReadFromBytes(rawResponseBuf); err != nil {
		retErr.PrivateErr = err
		return retErr
	}

	if err := sp.validateSignature(doc.Root()); err != nil {
		retErr.PrivateErr = err
		return retErr
	}

	var resp LogoutResponse
	if err := unmarshalElement(doc.Root(), &resp); err != nil {
		retErr.PrivateErr = err
		return retErr
	}
	if err := sp.validateLogoutResponse(&resp); err != nil {
		return err
	}
	return nil
}