VULNERABILITY INTELLIGENCE
CVE-2023-50868
CVSS score7.5 HIGH
EPSS probability74.30%
CISA KEVNot currently listed
Published2024-02-14
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.
Weakness classification
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-400
Primary references
- cve@mitre.org — Issue Tracking, Mailing List
- cve@mitre.org — Issue Tracking, Mailing List
- cve@mitre.org — Vendor Advisory
- cve@mitre.org — Issue Tracking
- cve@mitre.org — Technical Description
- cve@mitre.org — Vendor Advisory
- cve@mitre.org — Release Notes
- cve@mitre.org — Third Party Advisory
- cve@mitre.org — Mailing List, Vendor Advisory
- cve@mitre.org — Mailing List, Vendor Advisory
- cve@mitre.org — Mailing List, Vendor Advisory
- cve@mitre.org — Mailing List, Vendor Advisory