The Internet Key Exchange version 1 (IKEv1) implementation (isakmp_agg.c) in racoon in ipsec-tools before 0.6.3, when running in aggressive mode, allows remote attackers to cause a denial of service (null dereference and crash) via crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.
Conclusion & alert: CVE-2005-3732 is rated Moderate Risk (57.8/100): CVSS High severity, with high exploitation likelihood (EPSS 4.57%, 90th percentile). Core evidence: EPSS ranks this CVE among the most likely to be exploited in the near term. Mandatory action: High exploitation likelihood—assess exposure and prioritize remediation.
Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.
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 | 2026-06-15 | 16.17% | 4.57% | -11.60% |
| 2 | 2026-03-02 | 18.86% | 16.17% | -2.69% |
| 3 | 2025-03-30 | — | 18.86% | — |
Full EPSS history (11 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-2005-3732: 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-2005-3732 |
redhat
|
low | — | https://access.redhat.com/security/cve/CVE-2005-3732 |
ubuntu
|
medium | CVE-2005-3732 medium priority: Ubuntu including 1 source packages (ipsec-tools), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. | https://ubuntu.com/security/CVE-2005-3732 |
| Vendor | Product | Version | Raw CPE |
|---|---|---|---|
| ipsec-tools | ipsec-tools | 0.5 | cpe:2.3:a:ipsec-tools:ipsec-tools:0.5:*:*:*:*:*:*:* |
| ipsec-tools | ipsec-tools | 0.5.1 | cpe:2.3:a:ipsec-tools:ipsec-tools:0.5.1:*:*:*:*:*:*:* |
| ipsec-tools | ipsec-tools | 0.5.2 | cpe:2.3:a:ipsec-tools:ipsec-tools:0.5.2:*:*:*:*:*:*:* |
| ipsec-tools | ipsec-tools | 0.6 | cpe:2.3:a:ipsec-tools:ipsec-tools:0.6:*:*:*:*:*:*:* |
| ipsec-tools | ipsec-tools | 0.6.1 | cpe:2.3:a:ipsec-tools:ipsec-tools:0.6.1:*:*:*:*:*:*:* |
| ipsec-tools | ipsec-tools | 0.6.2 | cpe:2.3:a:ipsec-tools:ipsec-tools:0.6.2:*:*:*:*:*:*:* |