id: cache-poisoning

info:
  name: Cache Poisoning Detection
  author: melbadry9,xelkomy,akincibor,dogasantos
  severity: low
  reference:
    - https://blog.melbadry9.xyz/fuzzing/nuclei-cache-poisoning
    - https://portswigger.net/research/practical-web-cache-poisoning
    - https://portswigger.net/web-security/web-cache-poisoning
  tags: cache,generic
  metadata:
    max-request: 2

variables:
  cache_key: "{{to_lower(rand_base(6))}}"
  cache_header: "{{to_lower(rand_base(6))}}"

http:
  - raw:
      - |
        GET /?{{cache_key}}=9 HTTP/1.1
        Host: {{Hostname}}
        X-Forwarded-Prefix: {{cache_header}}.xfp
        X-Forwarded-Host: {{cache_header}}.xfh
        X-Forwarded-For: {{cache_header}}.xff

      - |
        GET /?{{cache_key}}=9 HTTP/1.1
        Host: {{Hostname}}

    matchers:
      - type: dsl
        dsl:
          - 'contains(body_2, cache_header)'