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Advisories

Hickory DNS 0.26.0-beta.1 before 0.26.2 DNSSEC Validation Bypass via Missing RFC 6840 Checks

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Severity
high
Date
Affecting

  • hickory-dns >= 0.26.0-beta.1, < 0.26.2

  • hickory-dns <= 0.26.0-alpha.1

CWE
  • CWE-345 Insufficient Verification of Data Authenticity
CVSS
8.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
qifan-sailboat
Description
Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 fail to verify, per RFC 6840 §4.4, that an NSEC or NSEC3 record denying a DS RRset also proves the delegation's NS record exists. Attackers can reuse child-side NSEC or NSEC3 records to fake an insecure delegation and forge child-zone records.

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