CVE-2004-0605: Ircd-Hybrid

Medium severity, CVSS 5.0. EPSS: 7.3% chance of exploitation in the next 30 days.

Non-registered IRC users using (1) ircd-hybrid 7.0.1 and earlier, (2) ircd-ratbox 1.5.1 and earlier, or (3) ircd-ratbox 2.0rc6 and earlier do not have a rate-limit imposed, which could allow remote attackers to cause a denial of service by repeatedly making requests, which are slowly dequeued.

Affected products

• Ircd-Hybrid Ircd-Hybrid: up to and including 7.0.1
• Ircd-Ratbox Ircd-Ratbox: up to and including 1.5.1; up to and including 2.0_rc6

Published 2004-12-06. Last modified 2026-06-16.