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Advisories

Hickory DNS NSEC3 Closest-Encloser Proof Unbounded Loop Denial of Service

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Severity
high
Date
Affecting

  • hickory-dns >= 0.25.0-alpha.3, <= 0.25.2

  • hickory-dns >= 0.26.0-alpha.1, < 0.26.1

CWE
  • CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
CVSS
8.7
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Description
Hickory DNS hickory-proto 0.25.0-alpha.3 through 0.25.2 and hickory-net before 0.26.1 contain an unbounded loop vulnerability in DnssecDnsHandle NSEC3 closest-encloser proof validation when the SOA owner is not an ancestor of the QNAME. Upstream attackers can return NoData or NXDomain responses with a cross-zone SOA record to panic debug builds or exhaust memory in release builds.

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