exposed-pki-cert: Exposed Internal PKI Infrastructure - Detect

id: exposed-pki-cert

info:
  name: Exposed Internal PKI Infrastructure - Detect
  author: nullenc0de
  severity: high
  description: |
    Detects exposed internal PKI infrastructure including CRL distribution points and OCSP responders
  metadata:
    verified: true
    max-request: 10
  tags: pki,exposure,misconfig,vuln

http:
  - method: GET
    path:
      - "{{BaseURL}}{{paths}}"

    payloads:
      paths:
        - "/"
        - "/certsrv/"
        - "/pki/"
        - "/PKI/"
        - "/crl/"
        - "/CRL/"
        - "/.well-known/pki-validation/"
        - "/ocsp/"
        - "/CertEnroll/"
        - "/CertSrv/"

    stop-at-first-match: true
    host-redirects: true
    max-redirects: 2

    matchers-condition: or
    matchers:
      - type: dsl
        dsl:
          - 'contains_any(body, "Certificate Services", "CRL Distribution Point", "OCSP Responder")'
          - '!regex("(?i)^\\s*This is an OCSP responder\\.?\\s*$", body)'
        condition: and

      - type: regex
        regex:
          - '\\bCN=[A-Za-z0-9-]+-CA\\b'
          - '(?i)href\s*=\s*"[^"]+\.(?:crl|cer|p7b)"'

    extractors:
      - type: regex
        name: certificate_details
        regex:
          - 'CN=[A-Za-z0-9-]+-CA'
          - 'O=[A-Za-z0-9 ]+'
          - 'OU=[A-Za-z0-9 ]+'
# digest: 490a00463044022064e85761643bdce114bff0ec9fecda36293cb7ea7ed79b6313ef46ed7567f3ca02205744b10e40ee476989e9d68dc7307bd9fd6c24c56286ba262fa64fa37916d47b:922c64590222798bb761d5b6d8e72950