CVE-2005-3732: Ipsec-Tools

High severity, CVSS 7.8. EPSS: 4.4% chance of exploitation in the next 30 days.

The Internet Key Exchange version 1 (IKEv1) implementation (isakmp_agg.c) in racoon in ipsec-tools before 0.6.3, when running in aggressive mode, allows remote attackers to cause a denial of service (null dereference and crash) via crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.

Affected products

• Ipsec-Tools Ipsec-Tools: version 0.5 only; version 0.5.1 only; version 0.5.2 only; version 0.6 only; version 0.6.1 only; version 0.6.2 only

Published 2005-11-21. Last modified 2026-06-16.