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Cisco Bug: CSCvv27062 - DNS returning wildcard match when empty non-terminal is a closer enclosure

Last Modified

Oct 05, 2020

Products (1)

  • Cisco Network Registrar

Known Affected Releases

9.1

Description (partial)

Symptom:
DNS returns a synthesized wildcard response instead of a NO DATA response (rcode=NOERROR, empty answer section).

Conditions:
The query name does match the wildcard record but an empty non-terminal record is a closer enclosure. As per RFC 4592, when an empty non-terminal is a closer enclosure, the DNS server should return a NO DATA response.
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