CVE-2005-3673: Check Point

High severity, CVSS 7.8. EPSS: 4.9% chance of exploitation in the next 30 days.

The Internet Key Exchange version 1 (IKEv1) implementation in Check Point products allows remote attackers to cause a denial of service via certain crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1. NOTE: due to the lack of details in the advisory, it is unclear which of CVE-2005-3666, CVE-2005-3667, and/or CVE-2005-3668 this issue applies to.

Affected products

• Check Point Check Point: any version
• Check Point Express: version ci_r57 only
• Check Point Firewall-1: version 3.0 only
• Check Point VPN-1: version ngx_r60 only
• Check Point VPN-1 Firewall-1 Next Generation: version r54 only; version r55 only; version r55p only; version r55w only

Published 2005-11-18. Last modified 2026-06-16.