{"cve":"CVE-2023-50868","nvd":{"published":"2024-02-14T16:15:45.377","modified":"2026-06-17T06:40:07.417","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-400"],"references":["http://www.openwall.com/lists/oss-security/2024/02/16/2","http://www.openwall.com/lists/oss-security/2024/02/16/3","https://access.redhat.com/security/cve/CVE-2023-50868","https://bugzilla.suse.com/show_bug.cgi?id=1219826","https://datatracker.ietf.org/doc/html/rfc5155"],"products":["debian:debian_linux","fedoraproject:fedora","isc:bind","netapp:active_iq_unified_manager","netapp:bootstrap_os","netapp:hci_baseboard_management_controller","powerdns:recursor","redhat:enterprise_linux"],"source":"nvd","synced_at":"2026-10-19T21:45:59.823092188+00:00"},"epss":{"cve":"CVE-2023-50868","score":0.74295,"percentile":0.99489,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}