Vulnerability in Unbound DNS Resolvers by Internet Systems Consortium

CVE-2017-15105

What is CVE-2017-15105?

A security issue was identified in Unbound, versions prior to 1.6.8, related to the validation of wildcard-synthesized NSEC records. This flaw allows attackers to manipulate DNS responses by exploiting improperly validated wildcard NSEC records. Consequently, an attacker could falsely prove the non-existence of an existing wildcard record or mislead the resolver into accepting a NODATA proof, potentially leading to ongoing DNS resolution errors and security implications in affected environments.

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References