AIKIDO-2026-350959
hickory-resolver is vulnerable to Denial of Service (DoS)
30
Low Risk
This Affects:
hickory-resolverTL;DR
DNSSEC-bogus answers are cached using the record TTL from the unauthenticated response, bounded only by 24 hours. Because that TTL is not trustworthy, a crafted invalidly signed response can pin a bogus verdict in the cache for a long time. Subsequent queries for the same name keep failing until the entry expires. The fix caps cached validation failures at a small TTL.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you enable DNSSEC validation.
Background info
hickory-resolver is vulnerable to Denial of Service (DoS) in versions 0.26.0 - 0.26.1.
How to fix this
Upgrade the hickory-resolver and/or the hickory-net library to the patch version.
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