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The following commit(s) were added to refs/heads/camel-4.14.x by this push:
new 7bab32baa33d CAMEL-23782: harden camel-leveldb aggregation-repository
key deserialization with an ObjectInputFilter (backport to 4.14.x) (#24083)
7bab32baa33d is described below
commit 7bab32baa33d003add1c2126d94ea74760a7b702
Author: Andrea Cosentino <[email protected]>
AuthorDate: Wed Jun 17 15:44:19 2026 +0200
CAMEL-23782: harden camel-leveldb aggregation-repository key
deserialization with an ObjectInputFilter (backport to 4.14.x) (#24083)
CAMEL-23782: harden camel-leveldb aggregation-repository key
deserialization with an ObjectInputFilter
Signed-off-by: Andrea Cosentino <[email protected]>
Co-authored-by: Claude Opus 4.8 (1M context) <[email protected]>
---
.../serializer/DefaultLevelDBSerializer.java | 7 +++
.../DefaultLevelDBSerializerKeyFilterTest.java | 63 ++++++++++++++++++++++
2 files changed, 70 insertions(+)
diff --git
a/components/camel-leveldb/src/main/java/org/apache/camel/component/leveldb/serializer/DefaultLevelDBSerializer.java
b/components/camel-leveldb/src/main/java/org/apache/camel/component/leveldb/serializer/DefaultLevelDBSerializer.java
index 723a5859a65d..5389d6f9cbc2 100644
---
a/components/camel-leveldb/src/main/java/org/apache/camel/component/leveldb/serializer/DefaultLevelDBSerializer.java
+++
b/components/camel-leveldb/src/main/java/org/apache/camel/component/leveldb/serializer/DefaultLevelDBSerializer.java
@@ -30,6 +30,12 @@ import
org.apache.camel.util.ClassLoadingAwareObjectInputStream;
public class DefaultLevelDBSerializer extends AbstractLevelDBSerializer {
+ // Keys are always serialized as a java.lang.String (see serializeKey).
Restrict key deserialization
+ // to String only and apply JEP-290 graph-shape limits as
defense-in-depth, consistent with the
+ // ObjectInputFilter applied on the exchange deserialization path.
+ private static final String KEY_DESERIALIZATION_FILTER
+ = "java.lang.String;maxdepth=2;maxrefs=100;maxbytes=1048576;!*";
+
@Override
public byte[] serializeKey(String key) throws IOException {
try (final ByteArrayOutputStream baos = new ByteArrayOutputStream();
@@ -42,6 +48,7 @@ public class DefaultLevelDBSerializer extends
AbstractLevelDBSerializer {
@Override
public String deserializeKey(byte[] buffer) throws IOException {
try (final ObjectInputStream ois = new ObjectInputStream(new
ByteArrayInputStream(buffer))) {
+
ois.setObjectInputFilter(ObjectInputFilter.Config.createFilter(KEY_DESERIALIZATION_FILTER));
return (String) ois.readObject();
} catch (ClassNotFoundException e) {
//this should not happen because serialized content should be
String
diff --git
a/components/camel-leveldb/src/test/java/org/apache/camel/component/leveldb/DefaultLevelDBSerializerKeyFilterTest.java
b/components/camel-leveldb/src/test/java/org/apache/camel/component/leveldb/DefaultLevelDBSerializerKeyFilterTest.java
new file mode 100644
index 000000000000..db03ed3a8f89
--- /dev/null
+++
b/components/camel-leveldb/src/test/java/org/apache/camel/component/leveldb/DefaultLevelDBSerializerKeyFilterTest.java
@@ -0,0 +1,63 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.apache.camel.component.leveldb;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InvalidClassException;
+import java.io.ObjectOutputStream;
+import java.util.HashMap;
+
+import org.apache.camel.component.leveldb.serializer.DefaultLevelDBSerializer;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+
+/**
+ * Verifies that {@link DefaultLevelDBSerializer#deserializeKey(byte[])}
applies an ObjectInputFilter: legitimate String
+ * keys still round-trip, while a crafted non-String object graph is rejected
(defense-in-depth for the aggregation
+ * repository key path).
+ */
+public class DefaultLevelDBSerializerKeyFilterTest {
+
+ private final DefaultLevelDBSerializer serializer = new
DefaultLevelDBSerializer();
+
+ @Test
+ public void testStringKeyRoundTrip() throws IOException {
+ String key = "my-correlation-key-123";
+ byte[] bytes = serializer.serializeKey(key);
+ assertEquals(key, serializer.deserializeKey(bytes), "A String key must
still deserialize correctly");
+ }
+
+ @Test
+ public void testNonStringKeyIsRejectedByFilter() throws IOException {
+ // A malicious actor could place a non-String (object-graph) payload
where a key is expected.
+ byte[] payload;
+ try (ByteArrayOutputStream baos = new ByteArrayOutputStream();
+ ObjectOutputStream oos = new ObjectOutputStream(baos)) {
+ HashMap<String, String> notAKey = new HashMap<>();
+ notAKey.put("k", "v");
+ oos.writeObject(notAKey);
+ payload = baos.toByteArray();
+ }
+
+ // The ObjectInputFilter must reject any class other than
java.lang.String.
+ assertThrows(InvalidClassException.class, () ->
serializer.deserializeKey(payload),
+ "A non-String key payload must be rejected by the
deserialization filter");
+ }
+}
