CVE-2005-3669

CVE-2005-3669 is a medium-severity vulnerability in Cisco Pix Firewall with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

• Severity: Medium (CVSS 2.0 base score 5.0)
• EPSS exploit prediction: 5% (91st percentile)
• Actively exploited: Not listed in CISA KEV
• Affected product: Cisco Pix Firewall
• Published: 2005-11-18
• Last modified: 2026-06-16

Description

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

Frequently asked questions

What is CVE-2005-3669?

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

How severe is CVE-2005-3669?

CVE-2005-3669 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2005-3669 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (91st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2005-3669?

CVE-2005-3669 primarily affects Cisco Pix Firewall. In total, 138 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2005-3669?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2005-3669 published?

CVE-2005-3669 was published on 2005-11-18 and last updated on 2026-06-16.

References

• http://jvn.jp/niscc/NISCC-273756/index.html
• http://secunia.com/advisories/17553
• http://securitytracker.com/id?1015198
• http://securitytracker.com/id?1015199
• http://securitytracker.com/id?1015200
• http://securitytracker.com/id?1015201
• http://securitytracker.com/id?1015202
• http://www.cisco.com/warp/public/707/cisco-sa-20051114-ipsec.shtml
• http://www.ee.oulu.fi/research/ouspg/protos/testing/c09/isakmp/
• http://www.kb.cert.org/vuls/id/226364
• http://www.niscc.gov.uk/niscc/docs/br-20051114-01013.html?lang=en
• http://www.securityfocus.com/bid/15401
• https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5226

Affected products (138)

• cpe:2.3:h:cisco:firewall_services_module:*:*:*:*:*:*:*:*
• cpe:2.3:h:cisco:firewall_services_module:1.1.2:*:*:*:*:*:*:*
• cpe:2.3:h:cisco:firewall_services_module:1.1.3:*:*:*:*:*:*:*
• cpe:2.3:h:cisco:firewall_services_module:1.1_\(3.005\):*:*:*:*:*:*:*
• cpe:2.3:h:cisco:firewall_services_module:2.1_\(0.208\):*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:2.0:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:2.5.2.a:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:2.5.2.b:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:2.5.2.c:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:2.5.2.d:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:2.5.2.f:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.0:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.0.3.a:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.0.3.b:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.0.4:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.1:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.1\(rel\):*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.1.1:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.1.2:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.1.4:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.5\(rel\):*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.5.1:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.5.2:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.5.3:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.5.4:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.5.5:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.6:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.6.1:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.6.7:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:3.6.7d:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:4.0:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:4.0.1:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:4.0.5.b:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:4.1.5.b:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:4.1.7.a:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:4.1.7.b:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:4.7.1:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:vpn_3000_concentrator_series_software:4.7.1.f:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.2sxd:*:*:*:*:*:*:*
• cpe:2.3:o:cisco:ios:12.3t:*:*:*:*:*:*:*

More vulnerabilities in Cisco Pix Firewall

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• CVE-2005-4499 — High (CVSS 7.5): The Downloadable RADIUS ACLs feature in Cisco PIX and VPN 3000 concentrators, when creating an ACL on the Cisco Secure…
• CVE-2004-0079 — High (CVSS 7.5): The do_change_cipher_spec function in OpenSSL 0.9.6c to 0.9.6k, and 0.9.7a to 0.9.7c, allows remote attackers to cause…
• CVE-2002-0954 — High (CVSS 7.5): The encryption algorithms for enable and passwd commands on Cisco PIX Firewall can be executed quickly due to a limited…
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