The Internet Key Exchange version 1 (IKEv1) implementation in Openswan 2 (openswan-2)…
Priority MEDIUM 44Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- None · None · Complete
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.07453 94th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 9
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:frees_wan:frees_wan:2.04:*:*:*:*:*:*:* | 2.04 | Vulnerable | Frees Wan |
| cpe:2.3:a:openswan:openswan:2.1.1:*:*:*:*:*:*:* | 2.1.1 | Vulnerable | Openswan |
| cpe:2.3:a:openswan:openswan:2.1.2:*:*:*:*:*:*:* | 2.1.2 | Vulnerable | Openswan |
| cpe:2.3:a:openswan:openswan:2.1.4:*:*:*:*:*:*:* | 2.1.4 | Vulnerable | Openswan |
| cpe:2.3:a:openswan:openswan:2.1.5:*:*:*:*:*:*:* | 2.1.5 | Vulnerable | Openswan |
| cpe:2.3:a:openswan:openswan:2.1.6:*:*:*:*:*:*:* | 2.1.6 | Vulnerable | Openswan |
| cpe:2.3:a:openswan:openswan:2.2:*:*:*:*:*:*:* | 2.2 | Vulnerable | Openswan |
| cpe:2.3:a:openswan:openswan:2.3:*:*:*:*:*:*:* | 2.3 | Vulnerable | Openswan |
| cpe:2.3:a:xelerance:openswan:2.4.0:*:*:*:*:*:*:* | 2.4.0 | Vulnerable | Xelerance |
- cpe:2.3:a:frees_wan:frees_wan:2.04:*:*:*:*:*:*:* Versions 2.04 Vulnerable ·Frees Wan
- cpe:2.3:a:openswan:openswan:2.1.1:*:*:*:*:*:*:* Versions 2.1.1 Vulnerable ·Openswan
- cpe:2.3:a:openswan:openswan:2.1.2:*:*:*:*:*:*:* Versions 2.1.2 Vulnerable ·Openswan
- cpe:2.3:a:openswan:openswan:2.1.4:*:*:*:*:*:*:* Versions 2.1.4 Vulnerable ·Openswan
- cpe:2.3:a:openswan:openswan:2.1.5:*:*:*:*:*:*:* Versions 2.1.5 Vulnerable ·Openswan
- cpe:2.3:a:openswan:openswan:2.1.6:*:*:*:*:*:*:* Versions 2.1.6 Vulnerable ·Openswan
- cpe:2.3:a:openswan:openswan:2.2:*:*:*:*:*:*:* Versions 2.2 Vulnerable ·Openswan
- cpe:2.3:a:openswan:openswan:2.3:*:*:*:*:*:*:* Versions 2.3 Vulnerable ·Openswan
- cpe:2.3:a:xelerance:openswan:2.4.0:*:*:*:*:*:*:* Versions 2.4.0 Vulnerable ·Xelerance
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2005-3671
- 2026-10-03 Alias added: GHSA-rv79-rv3w-mqqc
References
Advisory 6
Sources
- CVE-2005-3671 · CVE Program
- CVE-2005-3671 · NVD
- FIRST EPSS
- GHSA-rv79-rv3w-mqqc · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences