Fixing XML parsers security bug

Change-Id: I8a4f156196af47272a2732b1fbddafb6f0eb1f4d
Issue-ID: SO-3668
Signed-off-by: waqas.ikram <waqas.ikram@est.tech>

2 files changed, 10 insertions, 6 deletions

diff --git a/adapters/mso-openstack-adapters/src/main/java/org/onap/so/adapters/tasks/orchestration/PollService.java b/adapters/mso-openstack-adapters/src/main/java/org/onap/so/adapters/tasks/orchestration/PollService.java
index 44d394730f..dfb3075d00 100644
--- a/adapters/mso-openstack-adapters/src/main/java/org/onap/so/adapters/tasks/orchestration/PollService.java
+++ b/adapters/mso-openstack-adapters/src/main/java/org/onap/so/adapters/tasks/orchestration/PollService.java
@@ -32,6 +32,7 @@ import javax.xml.XMLConstants;
 import javax.xml.bind.JAXB;
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.mutable.MutableBoolean;
 import org.camunda.bpm.client.task.ExternalTask;
 import org.camunda.bpm.client.task.ExternalTaskService;
@@ -76,8 +77,6 @@ public class PollService extends ExternalTaskUtils {
 
     private static final Logger logger = LoggerFactory.getLogger(PollService.class);
 
-    private static final String EMPTY_STRING = "";
-
     @Autowired
     private MsoVnfAdapterImpl vnfAdapterImpl;
 
@@ -326,8 +325,8 @@ public class PollService extends ExternalTaskUtils {
     protected Optional<String> findRequestType(final String xmlString) {
         try {
             final DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
-            factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, EMPTY_STRING);
-            factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_SCHEMA, EMPTY_STRING);
+            factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, StringUtils.EMPTY);
+            factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_SCHEMA, StringUtils.EMPTY);
 
             final DocumentBuilder builder = factory.newDocumentBuilder();
             final Document doc = builder.parse(new ByteArrayInputStream(xmlString.getBytes(StandardCharsets.UTF_8)));
diff --git a/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/bpmn/infrastructure/sdnc/tasks/SDNCRequestTasks.java b/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/bpmn/infrastructure/sdnc/tasks/SDNCRequestTasks.java
index 5b40768573..7ed8447fa6 100644
--- a/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/bpmn/infrastructure/sdnc/tasks/SDNCRequestTasks.java
+++ b/bpmn/so-bpmn-tasks/src/main/java/org/onap/so/bpmn/infrastructure/sdnc/tasks/SDNCRequestTasks.java
@@ -22,6 +22,7 @@ package org.onap.so.bpmn.infrastructure.sdnc.tasks;
 
 import java.io.StringReader;
 import java.io.StringWriter;
+import javax.xml.XMLConstants;
 import javax.xml.parsers.DocumentBuilder;
 import javax.xml.parsers.DocumentBuilderFactory;
 import javax.xml.transform.Transformer;
@@ -30,6 +31,7 @@ import javax.xml.transform.dom.DOMSource;
 import javax.xml.transform.stream.StreamResult;
 import javax.xml.xpath.XPath;
 import javax.xml.xpath.XPathFactory;
+import org.apache.commons.lang3.StringUtils;
 import org.camunda.bpm.engine.delegate.DelegateExecution;
 import org.onap.logging.filter.base.ONAPComponents;
 import org.onap.so.bpmn.infrastructure.sdnc.exceptions.SDNCErrorResponseException;
@@ -151,8 +153,11 @@ public class SDNCRequestTasks {
     }
 
     protected String getXmlElement(final Document doc, final String exp) throws Exception {
-        final TransformerFactory tf = TransformerFactory.newInstance();
-        final Transformer transformer = tf.newTransformer();
+        final TransformerFactory factory = TransformerFactory.newInstance();
+        factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_DTD, StringUtils.EMPTY);
+        factory.setAttribute(XMLConstants.ACCESS_EXTERNAL_STYLESHEET, StringUtils.EMPTY);
+
+        final Transformer transformer = factory.newTransformer();
         final StringWriter writer = new StringWriter();
         transformer.transform(new DOMSource(doc), new StreamResult(writer));
         logger.debug(writer.getBuffer().toString());