AIKIDO-2026-436559
hickory-net is vulnerable to Improper Verification of Cryptographic Signature
59
Medium Risk
This Affects:
hickory-netTL;DR
The NSEC handler does not distinguish a parent-side delegation NSEC from an authoritative child-side NSEC. A parent zone's signed NSEC at a zone cut is accepted as covering both a queried name and the synthesized wildcard, yielding a secure NXDOMAIN for names that exist in the child zone. Only genuinely signed parent records are required to mount the forgery. The fix rejects ancestor-delegation NSEC records as nonexistence proofs below the cut.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you have DNSSEC validation enabled
Background info
hickory-net is vulnerable to Improper Verification of Cryptographic Signature in versions 0.26.0 - 0.26.1.
How to fix this
Upgrade the hickory-net library to the patch version.
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