Merge pull request from GHSA-r2hc-pmr7-4c9r
* Configured XML parsers to resist XXE attacks Signed-off-by: Kai Kreuzer <kai@openhab.org> * added fix for avmfritz Signed-off-by: Kai Kreuzer <kai@openhab.org> * added fix for sonos Signed-off-by: Kai Kreuzer <kai@openhab.org> * added fix for vitotronic and bosesoundtouch Signed-off-by: Kai Kreuzer <kai@openhab.org> * changed avmfritz to singleton pattern Signed-off-by: Kai Kreuzer <kai@openhab.org> * addressed roku binding Signed-off-by: Kai Kreuzer <kai@openhab.org> * address all uses of DocumentBuilderFactory Signed-off-by: Kai Kreuzer <kai@openhab.org> * fixed other occurrences in roku binding Signed-off-by: Kai Kreuzer <kai@openhab.org>
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@@ -209,6 +209,12 @@ public class FrontierSiliconRadioApiResult {
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private Document getXmlDocFromString(String xmlString)
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throws ParserConfigurationException, SAXException, IOException {
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final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
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// see https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html
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factory.setFeature("http://xml.org/sax/features/external-general-entities", false);
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factory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
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factory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
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factory.setXIncludeAware(false);
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factory.setExpandEntityReferences(false);
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final DocumentBuilder builder = factory.newDocumentBuilder();
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final Document xmlDocument = builder.parse(new InputSource(new StringReader(xmlString)));
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return xmlDocument;
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