nuclei-templates/dns/detect-dangling-cname.yaml

id: detect-dangling-cname

info:
  name: CNAME Detect Dangling
  author: pdteam,nytr0gen
  severity: info
  description: A CNAME detect dangling condition was discovered. Most commonly this relates to failing to remove records from the zone once they are no longer needed.
  reference:
    - https://securitytrails.com/blog/subdomain-takeover-tips
    - https://nominetcyber.com/dangling-dns-is-no-laughing-matter/
    - https://nabeelxy.medium.com/dangling-dns-records-are-a-real-vulnerability-361f2a29d37f
    - https://docs.microsoft.com/en-us/azure/security/fundamentals/subdomain-takeover
  classification:
    cwe-id: CWE-200
  tags: dns,takeover

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

    matchers-condition: and
    matchers:
      - type: word
        words:
          - "NXDOMAIN"

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

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

# Enhanced by mp on 2022/03/13
Template file update and references 2021-07-22 08:29:34 +00:00			`id: detect-dangling-cname`

			`info:`
Dashboard Text Enhancements (#3901) Dashboard Text Enhancements 2022-03-14 13:44:54 +00:00			`name: CNAME Detect Dangling`
Template file update and references 2021-07-22 08:29:34 +00:00			`author: pdteam,nytr0gen`
			`severity: info`
refactor: Description field uniformization * info field reorder * reference values refactored to list * added new lines after the id and before the protocols * removed extra new lines * split really long descriptions to multiple lines (part 1) * other minor fixes 2022-04-22 10:38:41 +00:00			`description: A CNAME detect dangling condition was discovered. Most commonly this relates to failing to remove records from the zone once they are no longer needed.`
Removed pipe (\|) character from references, because the structure requires it to be a string slice, not a string Related nuclei tickets: * #259 - dynamic key-value field support for template information * #940 - new infos in template * #834 * RES-84 2021-08-18 11:37:49 +00:00			`reference:`
Satisfying the linter (all errors and warnings) * whitespace modifications only 2021-08-19 14:44:46 +00:00			`- https://securitytrails.com/blog/subdomain-takeover-tips`
			`- https://nominetcyber.com/dangling-dns-is-no-laughing-matter/`
			`- https://nabeelxy.medium.com/dangling-dns-records-are-a-real-vulnerability-361f2a29d37f`
			`- https://docs.microsoft.com/en-us/azure/security/fundamentals/subdomain-takeover`
Dashboard Text Enhancements (#3901) Dashboard Text Enhancements 2022-03-14 13:44:54 +00:00			`classification:`
			`cwe-id: CWE-200`
refactor: Description field uniformization * info field reorder * reference values refactored to list * added new lines after the id and before the protocols * removed extra new lines * split really long descriptions to multiple lines (part 1) * other minor fixes 2022-04-22 10:38:41 +00:00			`tags: dns,takeover`
Template file update and references 2021-07-22 08:29:34 +00:00
			`dns:`
			`- name: "{{FQDN}}"`
			`type: A`
update: dns template format update (#3305) 2021-12-09 13:05:44 +00:00
Template file update and references 2021-07-22 08:29:34 +00:00			`matchers-condition: and`
			`matchers:`
			`- type: word`
			`words:`
			`- "NXDOMAIN"`

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

			`extractors:`
			`- type: regex`
			`group: 1`
			`regex:`
			`- "IN\tCNAME\t(.+)"`
Dashboard Text Enhancements (#3901) Dashboard Text Enhancements 2022-03-14 13:44:54 +00:00
			`# Enhanced by mp on 2022/03/13`