CVE-2023-50868

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.

Patch Available

Fix available through Seal Security.  
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Fix without upgrading

Score

Severity

Ecosystem

APT

Publish Date

February 14, 2024

Modified Date

August 9, 2025

Score Vector

Affected Versions