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.
Conclusion & alert: CVE-2005-3671 is rated High Exploit Risk (74.3/100): CVSS High severity, with high exploitation likelihood (EPSS 6.72%, 91th percentile). Core evidence: 1 public exploit reference(s) are indexed (Exploit-DB). Mandatory action: Public exploits are available—assess exposure, apply mitigations, and prioritize patching.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
| EDB-ID | Source | Kind | Published | Link |
|---|---|---|---|---|
| — | nvd_ref | exploit_tag | Exploit-DB ↗ |
EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).
| # | Date | Old EPSS score | New EPSS score | Delta (New - Old) |
|---|---|---|---|---|
| 1 | 2025-08-29 | 10.47% | 6.72% | -3.75% |
| 2 | 2025-03-17 | 3.19% | 10.47% | +7.28% |
| 3 | 2024-12-17 | — | 3.19% | — |
Full EPSS history (5 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.8 | 2.0 | HIGH |
|
10.0 | 6.9 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
low | CVE-2005-3671: 1 GLSA(s) (200512-04), 2 atom(s) (net-firewall/ipsec-tools, net-misc/openswan); latest impact low. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2005-3671 |
suse
|
medium | — | https://www.suse.com/security/cve/CVE-2005-3671/ |
ubuntu
|
medium | CVE-2005-3671 medium priority: Ubuntu including 1 source packages (openswan), 5 status rows across 5 suites (dapper, edgy, feisty, gutsy, upstream): released 5. | https://ubuntu.com/security/CVE-2005-3671 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| frees_wan | frees_wan | 2.04 | cpe:2.3:a:frees_wan:frees_wan:2.04:*:*:*:*:*:*:* |
| openswan | openswan | 2.1.1 | cpe:2.3:a:openswan:openswan:2.1.1:*:*:*:*:*:*:* |
| openswan | openswan | 2.1.2 | cpe:2.3:a:openswan:openswan:2.1.2:*:*:*:*:*:*:* |
| openswan | openswan | 2.1.4 | cpe:2.3:a:openswan:openswan:2.1.4:*:*:*:*:*:*:* |
| openswan | openswan | 2.1.5 | cpe:2.3:a:openswan:openswan:2.1.5:*:*:*:*:*:*:* |
| openswan | openswan | 2.1.6 | cpe:2.3:a:openswan:openswan:2.1.6:*:*:*:*:*:*:* |
| openswan | openswan | 2.2 | cpe:2.3:a:openswan:openswan:2.2:*:*:*:*:*:*:* |
| openswan | openswan | 2.3 | cpe:2.3:a:openswan:openswan:2.3:*:*:*:*:*:*:* |
| xelerance | openswan | 2.4.0 | cpe:2.3:a:xelerance:openswan:2.4.0:*:*:*:*:*:*:* |