id: cname-fingerprint

info:
  name: CNAME Fingerprint
  author: pdteam
  severity: info
  description: A CNAME DNS record was discovered.
  reference:
    - https://www.theregister.com/2021/02/24/dns_cname_tracking/
    - https://www.ionos.com/digitalguide/hosting/technical-matters/cname-record/
  classification:
    cwe-id: CWE-200
  tags: dns,cname
  metadata:
    max-request: 1

dns:
  - name: "{{FQDN}}"
    type: CNAME

    matchers:
      - type: word
        words:
          - "IN\tCNAME"

    extractors:
      - type: regex
        group: 1
        regex:
          - "IN\tCNAME\t(.+)"