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Two vulnerabilities were discovered in unbound, a validating, recursive,
caching DNS resolver. Specially crafted DNSSEC answers could lead
unbound down a very CPU intensive and time costly DNSSEC
(CVE-2023-50387) or NSEC3 hash (CVE-2023-50868) validation path,
resulting in denial of service.
Details can be found at
https://nlnetlabs.nl/downloads/unbound/CVE-2023-50387_CVE-2023-50868.txt