/*
 * 3D City Database - The Open Source CityGML Database
 * https://www.3dcitydb.org/
 *
 * Copyright 2013 - 2022
 * Chair of Geoinformatics
 * Technical University of Munich, Germany
 * https://www.lrg.tum.de/gis/
 *
 * The 3D City Database is jointly developed with the following
 * cooperation partners:
 *
 * Virtual City Systems, Berlin <https://vc.systems/>
 * M.O.S.S. Computer Grafik Systeme GmbH, Taufkirchen <http://www.moss.de/>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.citydb.util.xml;

import org.xml.sax.SAXNotRecognizedException;
import org.xml.sax.SAXNotSupportedException;

import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.parsers.SAXParserFactory;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerFactory;

public class SecureXMLProcessors {

    private SecureXMLProcessors() {
    }

    public static SAXParserFactory newSAXParserFactory() throws SAXNotSupportedException, SAXNotRecognizedException, ParserConfigurationException {
        SAXParserFactory factory = SAXParserFactory.newInstance();
        factory.setXIncludeAware(false);
        factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
        factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
        factory.setFeature("http://xml.org/sax/features/external-general-entities", false);
        factory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
        return factory;
    }

    public static DocumentBuilderFactory newDocumentBuilderFactory() throws ParserConfigurationException {
        DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
        factory.setXIncludeAware(false);
        factory.setExpandEntityReferences(false);
        factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
        factory.setFeature("http://apache.org/xml/features/disallow-doctype-decl", true);
        factory.setFeature("http://xml.org/sax/features/external-general-entities", false);
        factory.setFeature("http://xml.org/sax/features/external-parameter-entities", false);
        factory.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
        return factory;
    }

    public static TransformerFactory newTransformerFactory() throws TransformerConfigurationException {
        TransformerFactory factory = TransformerFactory.newInstance();
        factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
        factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, "");
        factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_STYLESHEET, "");
        return factory;
    }
}

@@ -2084,32 +2084,134 @@
 ities%22, false);%0A
+        factory.setFeature(%22http://apache.org/xml/features/nonvalidating/load-external-dtd%22, false);%0A%0A
         return f

Disable external DTDs for SAXParserFactory