Vulnerability Monitor

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CVE-2005-3671

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.

Security Impact Summary

CVE-2005-3671 is a security vulnerability that . Impacting 3 products from frees_wan, from openswan, from xelerance organizations running these solutions should prioritize assessment and patching.

Historical Context

Originally identified in 2005, this vulnerability predates many modern security frameworks and practices. The vulnerability landscape of that era was characterized by different threat models and less mature defense mechanisms compared to contemporary standards.

Published

2005-11-18T21:03:00.000

Last Modified

2025-04-03T01:03:51.193

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 7.8 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

10.0

Impact Score

6.9

Weaknesses

Type: Primary
NVD-CWE-Other

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	frees_wan	frees_wan	2.04	Yes
Application	openswan	openswan	2.1.1	Yes
Application	openswan	openswan	2.1.2	Yes
Application	openswan	openswan	2.1.4	Yes
Application	openswan	openswan	2.1.5	Yes
Application	openswan	openswan	2.1.6	Yes
Application	openswan	openswan	2.2	Yes
Application	openswan	openswan	2.3	Yes
Application	xelerance	openswan	2.4.0	Yes

References

http://archives.neohapsis.com/archives/bugtraq/2005-12/0138.html ([email protected])
http://archives.neohapsis.com/archives/bugtraq/2005-12/0161.html ([email protected])
http://jvn.jp/niscc/NISCC-273756/index.html ([email protected])
http://secunia.com/advisories/17581 ([email protected])
http://secunia.com/advisories/17680 ([email protected])
http://secunia.com/advisories/17980 ([email protected])
http://secunia.com/advisories/18115 ([email protected])
http://securitytracker.com/id?1015214 ([email protected])
http://www.ee.oulu.fi/research/ouspg/protos/testing/c09/isakmp/ Exploit ([email protected])
http://www.gentoo.org/security/en/glsa/glsa-200512-04.xml ([email protected])
http://www.kb.cert.org/vuls/id/226364 Third Party Advisory, US Government Resource ([email protected])
http://www.niscc.gov.uk/niscc/docs/re-20051114-01014.pdf?lang=en Vendor Advisory ([email protected])
http://www.novell.com/linux/security/advisories/2005_70_ipsec.html ([email protected])
http://www.openswan.org/niscc2/ Patch, Vendor Advisory ([email protected])
http://www.redhat.com/archives/fedora-announce-list/2005-November/msg00057.html ([email protected])
http://www.redhat.com/archives/fedora-announce-list/2005-November/msg00058.html ([email protected])
http://www.securityfocus.com/bid/15416 Patch ([email protected])
http://archives.neohapsis.com/archives/bugtraq/2005-12/0138.html (af854a3a-2127-422b-91ae-364da2661108)
http://archives.neohapsis.com/archives/bugtraq/2005-12/0161.html (af854a3a-2127-422b-91ae-364da2661108)
http://jvn.jp/niscc/NISCC-273756/index.html (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/17581 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/17680 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/17980 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/18115 (af854a3a-2127-422b-91ae-364da2661108)
http://securitytracker.com/id?1015214 (af854a3a-2127-422b-91ae-364da2661108)
http://www.ee.oulu.fi/research/ouspg/protos/testing/c09/isakmp/ Exploit (af854a3a-2127-422b-91ae-364da2661108)
http://www.gentoo.org/security/en/glsa/glsa-200512-04.xml (af854a3a-2127-422b-91ae-364da2661108)
http://www.kb.cert.org/vuls/id/226364 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
http://www.niscc.gov.uk/niscc/docs/re-20051114-01014.pdf?lang=en Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.novell.com/linux/security/advisories/2005_70_ipsec.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.openswan.org/niscc2/ Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/archives/fedora-announce-list/2005-November/msg00057.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/archives/fedora-announce-list/2005-November/msg00058.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/15416 Patch (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For frees_wan's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.