CVE-2005-3671

Frees Wan vulnerability

CVSS

7.8

EPSS

7.5%

EPSS pct

94th

Exploited

No known

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.

Affected vendor

Frees Wan

Affected product

Frees Wan

CVSS vector

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

Published

2005-11-18

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to complete impact to availability.

Its EPSS score of 7.5% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 94% of all scored CVEs.

Check your external exposure to CVE-2005-3671

Confirm whether Frees Wan Frees Wan is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2005-3671.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2005-3671

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2005-3671 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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