id: dns-rebinding

info:
  name: DNS Rebinding Attack
  author: ricardomaia
  severity: unknown
  description: |
    Detects DNS Rebinding attacks by checking if the DNS response contains a private IPv4 or IPv6 address.
  reference:
    - https://capec.mitre.org/data/definitions/275.html
    - https://payatu.com/blog/dns-rebinding/
    - https://heimdalsecurity.com/blog/dns-rebinding/
  tags: redirect,dns,network

dns:
  - name: "{{FQDN}}"
    type: A
    matchers:
      # IPv4
      - type: regex
        part: answer
        regex:
          - 'IN.*A.(\s)*(127\.0\.0\.1|10\.\d{1,3}\.\d{1,3}\.\d{1,3}|172\.(1[6-9]|2\d|3[0-1])\.\d{1,3}\.\d{1,3}|192\.168\.\d{1,3}\.\d{1,3})(127\.0\.0\.1|\b10\.\d{1,3}\.\d{1,3}\.\d{1,3}\b|172\.(1[6-9]|2\d|3[0-1])\.\d{1,3}\.\d{1,3}|192\.168\.\d{1,3}\.\d{1,3})$'

    extractors:
      - type: regex
        part: answer
        name: IPv4
        group: 1
        regex:
          - 'IN.*A.(\s)*(127\.0\.0\.1|10\.\d{1,3}\.\d{1,3}\.\d{1,3}|172\.(1[6-9]|2\d|3[0-1])\.\d{1,3}\.\d{1,3}|192\.168\.\d{1,3}\.\d{1,3})(127\.0\.0\.1|\b10\.\d{1,3}\.\d{1,3}\.\d{1,3}\b|172\.(1[6-9]|2\d|3[0-1])\.\d{1,3}\.\d{1,3}|192\.168\.\d{1,3}\.\d{1,3})'

  - name: "{{FQDN}}"
    type: AAAA
    matchers:
      # IPv6 Compressed
      - type: regex
        part: answer
        regex:
          - "IN.+A.+(fd([0-9a-fA-F]{2}):([0-9a-fA-F]{0,4}:){0,5}(:[0-9a-fA-F]{0,4}){1,2}(:)?)$"

      # IPv6
      - type: regex
        part: answer
        regex:
          - "IN.+A.+(fd([0-9a-fA-F]{2}):([0-9a-fA-F]{1,4}:){0,5}([0-9a-fA-F]{1,4}:){1,2}[0-9a-fA-F]{1,4})$"

    extractors:
      - type: regex
        part: answer
        name: IPv6_Compressed
        group: 1
        regex:
          - "IN.+A.+(fd([0-9a-fA-F]{2}):([0-9a-fA-F]{0,4}:){0,5}(:[0-9a-fA-F]{0,4}){1,2}(:)?)$"

      - type: regex
        part: answer
        name: IPv6
        group: 1
        regex:
          - "IN.+A.+(fd([0-9a-fA-F]{2}):([0-9a-fA-F]{1,4}:){0,5}([0-9a-fA-F]{1,4}:){1,2}[0-9a-fA-F]{1,4})$"
# digest: 4a0a004730450221009a895344f0f4bf8d0444566a7a2392d2074708d88d29a0922ebb71935290785702200a338fe1517c225d45750b08f80f3a903cd5925a32c542b5559f0202173732be:922c64590222798bb761d5b6d8e72950