CVE-2004-0155: The KAME IKE Daemon Racoon, when authenticating a peer during Phase 1, validates the X.509 certificate but doe

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HIGH 7.5MITIGATE

CVE-2004-0155 is a high-severity flaw (CVSS 7.5) affecting racoon. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.5 (High)
EPSS exploit chance	3.6% (top 10%)
CISA exploited list	No
Published	2004-06-01
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: kame

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2004-06-01 04:00 UTCPublished CVE record published
2026-06-16 22:05 UTCUpdated Record last modified

kame racoon MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy racoon || rpm -q racoon || racoon --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2004-0155?

racoon: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2004-0155 being exploited?

CVE-2004-0155 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2004-0155 affect?

CVE-2004-0155 affects racoon. Severity is high (CVSS 7.5). 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 m

How urgent is CVE-2004-0155?

Priority 49/100. High severity

Related CVEs

CVE-2005-0398 MEDIUM 5.0 DOWNGRADE DOWNGRADE The KAME racoon daemon in ipsec-tools before 0.5 allows remote attackers to cause a denial of service (crash)
CVE-2004-0607 HIGH 10.0 DOWNGRADE DOWNGRADE The eay_check_x509cert function in KAME Racoon successfully verifies certificates even when OpenSSL validation
CVE-2004-0403 MEDIUM 5.0 UPGRADE Racoon before 20040408a allows remote attackers to cause a denial of service (memory consumption) via an ISAKM
CVE-2004-0392 MEDIUM 5.0 UPGRADE racoon before 20040407b allows remote attackers to cause a denial of service (infinite loop and dropped connec
CVE-2004-0164 MEDIUM 5.0 DOWNGRADE KAME IKE daemon (racoon) does not properly handle hash values, which allows remote attackers to delete certifi

References

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