Knot-dns

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    Vulnerabilities

    CVE-2026-39155

    Knot DNS before 3.4.10 and 3.5.x before 3.5.4 contains a vulnerability in mod-onlinesign where the next NSEC owner name can be computed incorrectly. This can create an overly broad authenticated denial interval, allowing downstream validating resolvers using aggressive negative caching to synthesize negative answers for legitimate names and causing resolver-side denial of service.

    Last Modified: Aug 03, 2026
    Published: Jul 23, 2026

    CVE-2017-11104

    Knot DNS before 2.4.5 and 2.5.x before 2.5.2 contains a flaw within the TSIG protocol implementation that would allow an attacker with a valid key name and algorithm to bypass TSIG authentication if no additional ACL restrictions are set, because of an improper TSIG validity period check.

    Last Modified: Apr 20, 2025
    Published: Jul 08, 2017

    CVE-2016-6171

    Knot DNS before 2.3.0 allows remote DNS servers to cause a denial of service (memory exhaustion and slave server crash) via a large zone transfer for (1) DDNS, (2) AXFR, or (3) IXFR.

    Last Modified: Apr 20, 2025
    Published: Feb 09, 2017
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