BUG-2511 Fix XXE vulnerability in initial config loaders

[controller.git] / opendaylight / config / config-persister-directory-xml-adapter / src / main / java / org / opendaylight / controller / config / persist / storage / directory / xml / XmlDirectoryPersister.java

diff --git a/opendaylight/config/config-persister-directory-xml-adapter/src/main/java/org/opendaylight/controller/config/persist/storage/directory/xml/XmlDirectoryPersister.java b/opendaylight/config/config-persister-directory-xml-adapter/src/main/java/org/opendaylight/controller/config/persist/storage/directory/xml/XmlDirectoryPersister.java
index 85f70b9a01172f314fec16020d508e9769efeea7..3ea432e1739a7ed83047091f0a392e8918c8e45e 100644 (file)
--- a/opendaylight/config/config-persister-directory-xml-adapter/src/main/java/org/opendaylight/controller/config/persist/storage/directory/xml/XmlDirectoryPersister.java
+++ b/opendaylight/config/config-persister-directory-xml-adapter/src/main/java/org/opendaylight/controller/config/persist/storage/directory/xml/XmlDirectoryPersister.java
@@ -23,6 +23,10 @@ import java.util.SortedSet;
 import javax.xml.bind.JAXBContext;
 import javax.xml.bind.JAXBException;
 import javax.xml.bind.Unmarshaller;
+import javax.xml.stream.XMLInputFactory;
+import javax.xml.stream.XMLStreamException;
+import javax.xml.stream.XMLStreamReader;
+import javax.xml.transform.stream.StreamSource;
 import org.opendaylight.controller.config.persist.api.ConfigSnapshotHolder;
 import org.opendaylight.controller.config.persist.api.Persister;
 import org.opendaylight.controller.config.persist.storage.file.xml.model.ConfigSnapshot;
@@ -105,8 +109,15 @@ public class XmlDirectoryPersister implements Persister {
     public static ConfigSnapshotHolder loadLastConfig(final File file) throws JAXBException {
         JAXBContext jaxbContext = JAXBContext.newInstance(ConfigSnapshot.class);
         Unmarshaller um = jaxbContext.createUnmarshaller();
-
-        return asHolder((ConfigSnapshot) um.unmarshal(file));
+        XMLInputFactory xif = XMLInputFactory.newFactory();
+        xif.setProperty(XMLInputFactory.IS_SUPPORTING_EXTERNAL_ENTITIES, false);
+        xif.setProperty(XMLInputFactory.SUPPORT_DTD, false);
+        try {
+            XMLStreamReader xsr = xif.createXMLStreamReader(new StreamSource(file));
+            return asHolder((ConfigSnapshot) um.unmarshal(xsr));
+        } catch (final XMLStreamException e) {
+            throw new JAXBException(e);
+        }
     }
 
     private static ConfigSnapshotHolder asHolder(final ConfigSnapshot unmarshalled) {