CVE-2005-3768: Symantec Enterprise Firewall

High severity, CVSS 7.5. EPSS: 3.8% chance of exploitation in the next 30 days.

Buffer overflow in the Internet Key Exchange version 1 (IKEv1) implementation in Symantec Dynamic VPN Services, as used in Enterprise Firewall, Gateway Security, and Firewall /VPN Appliance products, allows remote attackers to cause a denial of service and possibly execute arbitrary code via crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.

Affected products

• Symantec Enterprise Firewall: version 8.0 only
• Symantec Firewall VPN Appliance 100: any version
• Symantec Firewall VPN Appliance 200: any version
• Symantec Gateway Security 300: version 2.0 only
• Symantec Gateway Security 400: version 2.0 only
• Symantec Gateway Security 5000 Series: version 3.0 only
• Symantec Gateway Security 5100: any version
• Symantec Gateway Security 5300: version 1.0 only
• Symantec Gateway Security 5310: version 1.0 only
• Symantec Gateway Security 5400: version 2.0.1 only

Published 2005-11-23. Last modified 2026-06-16.