CVE-2023-50868

HighCVSS 7.5/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-400

Affected software

No affected versions have been published.

Timeline

Published
Feb 14, 2024
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2023-50868: High severity, CVSS 7.5 | Vulnix