CVE-2005-3671
HighSummary
The IKEv1 implementation in Openswan 2 before 2.4.4 and freeswan in SUSE LINUX 9.1 before 2.04_1.5.4-1.23 allows remote attackers to cause a denial of service via a crafted packet using 3DES with an invalid key length or unspecified inputs when Aggressive Mode is enabled and the PSK is known.
Risk Assessment
The attack can disrupt IKEv1-based VPN services, leading to network unavailability for the organization.
Recommendation
Upgrade Openswan to version 2.4.4 or later, and apply appropriate security patches for SUSE LINUX 9.1.
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Original NVD description (English source)
The Internet Key Exchange version 1 (IKEv1) implementation in Openswan 2 (openswan-2) before 2.4.4, and freeswan in SUSE LINUX 9.1 before 2.04_1.5.4-1.23, allow remote attackers to cause a denial of service via (1) a crafted packet using 3DES with an invalid key length, or (2) unspecified inputs when Aggressive Mode is enabled and the PSK is known, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS