{"id":"DEBIAN-CVE-2023-50868","details":"The Closest Encloser Proof aspect of the DNS protocol (in RFC 5155 when RFC 9276 guidance is skipped) allows remote attackers to cause a denial of service (CPU consumption for SHA-1 computations) via DNSSEC responses in a random subdomain attack, aka the \"NSEC3\" issue. The RFC 5155 specification implies that an algorithm must perform thousands of iterations of a hash function in certain situations.","modified":"2026-09-15T09:02:48.125100358Z","published":"2024-02-14T16:15:45.377Z","upstream":["CVE-2023-50868"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-50868"}],"affected":[{"package":{"name":"bind9","ecosystem":"Debian:12","purl":"pkg:deb/debian/bind9?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.18.24-1"}]}],"versions":["1:9.18.12-1","1:9.18.13-1","1:9.18.16-1","1:9.18.16-1~deb12u1","1:9.18.16-1~deb12u1~bpo11+1","1:9.18.19-1~deb12u1","1:9.18.19-1~deb12u1~bpo11+1","1:9.18.24-1~bpo11+1"],"ecosystem_specific":{"urgency":"not yet 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