Improved: Improve UtilObject class (OFBIZ-12216)

Removes "DiskFileItem, FileItemHeadersImpl are not serializable" case. It does
not appear in trunk.

Handling with exception Rather than returning null cleans UtilObject class.

Restrict unauthorized deserialisations to java.rmi instead of java.rmi.server

framework/base/src/main/java/org/apache/ofbiz/base/util/SafeObjectInputStream.java

@@ -24,6 +24,7 @@
 
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.InvalidClassException;
 import java.io.ObjectInputStream;
 import java.io.ObjectStreamClass;
 import java.util.Arrays;
@@ -64,20 +65,11 @@ public SafeObjectInputStream(InputStream in) throws IOException {
     protected Class<?> resolveClass(ObjectStreamClass classDesc) throws IOException, ClassNotFoundException {
         String className = classDesc.getName();
         // DenyList exploits; eg: don't allow RMI here
-        if (className.contains("java.rmi.server")) {
-            Debug.logWarning("***Incompatible class***: "
-                    + classDesc.getName()
-                    + ". java.rmi.server classes are not allowed for security reason",
-                    "SafeObjectInputStream");
-            return null;
+        if (className.contains("java.rmi")) {
+            throw new InvalidClassException(className, "Unauthorized deserialisation attempt");
         }
         if (!allowlistPattern.matcher(className).find()) {
-            // DiskFileItem, FileItemHeadersImpl are not serializable.
-            if (className.contains("org.apache.commons.fileupload")) {
-                return null;
-            }
-            Debug.logWarning("***Incompatible class***: "
-                    + classDesc.getName()
+            Debug.logWarning("***Incompatible class***: " + className
                     + ". Please see OFBIZ-10837.  Report to dev ML if you use OFBiz without changes. "
                     + "Else follow https://s.apache.org/45war",
                     "SafeObjectInputStream");

framework/base/src/main/java/org/apache/ofbiz/base/util/UtilObject.java

@@ -77,11 +77,7 @@ public static Object getObject(byte[] bytes) {
         Object obj = null;
         try {
             obj = getObjectException(bytes);
-            // DiskFileItem, FileItemHeadersImpl are not serializable. So SafeObjectInputStream::resolveClass return null
-            if (obj == null) {
-                return null;
-            }
-        } catch (ClassNotFoundException | IOException e) {
+        } catch (IOException | ClassCastException | ClassNotFoundException e) {
             Debug.logError(e, MODULE);
         }
         return obj;
@@ -94,7 +90,7 @@ public static Object getObject(byte[] bytes) {
      * @throws ClassNotFoundException when the class can not be deserialized.
      * @throws IOException when a general Input/Output error happen.
      */
-    public static Object getObjectException(byte[] bytes) throws ClassNotFoundException, IOException {
+    public static Object getObjectException(byte[] bytes) throws ClassCastException, ClassNotFoundException, IOException {
         try (ByteArrayInputStream bis = new ByteArrayInputStream(bytes);
                 SafeObjectInputStream wois = new SafeObjectInputStream(bis)) {
             return wois.readObject();