AIKIDO-2026-649733
hickory-net is vulnerable to Improper Verification of Cryptographic Signature
59
Medium Risk
This Affects:
hickory-netTL;DR
When validating an insecure delegation, DNSSEC routines omit the RFC 6840 section 4.4 check that the NSEC or NSEC3 proving no DS record exists also proves the delegation's NS record exists or could exist. Without this check, NSEC or NSEC3 records from the child side of a zone cut can be reused to falsely prove a DS RRset is absent, downgrading a secure delegation to insecure. This enables forgery of records in the child zone. The fix adds the missing checks.
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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