Language: Java
Label: vulnerable
CWE: CWE-611 \u2014 Improper Restriction of XML External Entity Reference
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control, causing the product to embed incorrect documents into its output.

Code:
	private ByteArrayOutputStream storeMacrosToStream(StorableCdtVariables macros) throws CoreException {
		try {
			DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
			DocumentBuilder builder = factory.newDocumentBuilder();
			Document document = builder.newDocument();

			Element rootElement = document.createElement(StorableCdtVariables.MACROS_ELEMENT_NAME);
			document.appendChild(rootElement);
			ICStorageElement storageElement = new XmlStorageElement(rootElement);
			macros.serialize(storageElement);

			Transformer transformer = TransformerFactory.newInstance().newTransformer();
			transformer.setOutputProperty(OutputKeys.METHOD, "xml"); //$NON-NLS-1$
			transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8"); //$NON-NLS-1$
			transformer.setOutputProperty(OutputKeys.INDENT, "yes"); //$NON-NLS-1$
			DOMSource source = new DOMSource(document);

			ByteArrayOutputStream stream = new ByteArrayOutputStream();
			StreamResult result = new StreamResult(stream);

			transformer.transform(source, result);
			return stream;
		} catch (ParserConfigurationException e) {
			throw ExceptionFactory.createCoreException(e.getMessage(), e);
		} catch (TransformerConfigurationException e) {
			throw ExceptionFactory.createCoreException(e.getMessage(), e);
		} catch (TransformerException e) {
			throw ExceptionFactory.createCoreException(e.getMessage(), e);
		}
	}