The KAME IKE Daemon Racoon, when authenticating a peer during Phase 1, validates the X.509 certificate but does not verify the RSA signature authentication, which allows remote attackers to establish unauthorized IP connections or conduct man-in-the-middle attacks using a valid, trusted X.509 certificate.
Conclusion & alert: CVE-2004-0155 is rated Moderate Risk (61.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 5.19%). Mandatory action: Review affected assets and schedule 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 | 2025-12-20 | 4.93% | 5.19% | +0.25% |
| 2 | 2025-03-30 | 5.61% | 4.93% | -0.67% |
| 3 | 2025-03-29 | — | 5.61% | — |
Full EPSS history (8 records total)
CVSS metrics for this CVE.
| Base score | Version | Severity | Vector | Exploitability | Impact | Score source |
|---|---|---|---|---|---|---|
| 7.5 | 2.0 | HIGH |
|
10.0 | 6.4 | [email protected] |
| vendor | priority | summary | link |
|---|---|---|---|
gentoo
|
normal | CVE-2004-0155: 1 GLSA(s) (200406-17), 1 atom(s) (net-firewall/ipsec-tools); latest impact normal. | https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2004-0155 |
redhat
|
high | — | https://access.redhat.com/security/cve/CVE-2004-0155 |
ubuntu
|
medium | CVE-2004-0155 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-2004-0155 |