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

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id: detect-dangling-cname
info:
name: CNAME Detect Dangling
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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
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dns:
- name: "{{FQDN}}"
type: A
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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