CVE-2004-2483: Kerio Winroute Firewall

Medium severity, CVSS 6.4. EPSS: 1.7% chance of exploitation in the next 30 days.

Kerio WinRoute Firewall before 6.0.9 uses information from PTR queries in response to A queries, which allows remote attackers to poison the DNS cache or cause a denial of service (connection loss).

Affected products

• Kerio Winroute Firewall: version 6.0 only; version 6.0.1 only; version 6.0.2 only; version 6.0.3 only; version 6.0.4 only; version 6.0.5 only; …

Published 2004-12-31. Last modified 2026-06-16.