Debian dsa-5621 : bind9 - security update

The remote Debian 11 / 12 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-5621 advisory. - The DNS message parsing code in named includes a section whose computational complexity is overly high. It does not cause problems for typical DNS traffic,...

CVE-2023-50387

Certain DNSSEC aspects of the DNS protocol in RFC 4033, 4034, 4035, 6840, and related RFCs allow remote attackers to cause a denial of service CPU consumption via one or more DNSSEC responses, aka the "KeyTrap" issue. One of the concerns is that, when there is a zone with many DNSKEY and RRSIG...

DNSSEC validators -- denial-of-service/CPU exhaustion from KeyTrap and NSEC3 vulnerabilities

Simon Kelley reports: If DNSSEC validation is enabled, then an attacker who can force a DNS server to validate a specially crafted signed domain can use a lot of CPU in the validator. This only affects dnsmasq installations with DNSSEC enabled. Stichting NLnet Labs reports: The KeyTrap...

PT-2024-1672

Name of the Vulnerable Software and Affected Versions BIND versions prior to the fixed version Description The issue is related to the DNSSEC implementation in the DNS protocol, which can be exploited by remote attackers to cause a denial of service CPU consumption via one or more DNSSEC response...