Security Advisory

CVE-2023-50868

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2024-02-14 00:00:00

Last updated 2025-11-04 18:20:42

Assigner mitre

State PUBLISHED

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.

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