CVE-2004-0220: n/a vulnerability

CVE-2004-0220: isakmpd in OpenBSD 3.4 and earlier allows remote attackers to cause a denial of service via an ISAKMP packe...

isakmpd in OpenBSD 3.4 and earlier allows remote attackers to cause a denial of service via an ISAKMP packet with a malformed Cert Request payload, which causes an integer underflow that is used in a malloc operation that is not properly handled, as demonstrated by the Striker ISAKMP Protocol Test Suite.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 8, 2024, 00:10 UTC (UTC+00:00)

Security readout for executives and security teams

CVE-2004-0220 is an old remote denial-of-service issue in OpenBSD isakmpd. A malformed ISAKMP certificate request can crash or disrupt the service. Business risk is mainly VPN or IPsec availability, not data theft, based on the provided sources. Exposure is most likely where OpenBSD 3.4 or earlier runs isakmpd and accepts ISAKMP traffic from untrusted networks. Systems not running isakmpd, not using IPsec/IKE, or already updated beyond the vendor errata are less likely affected. Prioritize remediation for internet-facing VPN or IPsec endpoints still running old OpenBSD. For modern systems, urgency is mainly legacy asset discovery and confirming no unsupported isakmpd exposure remains. Mitigation focus: Apply the OpenBSD March 17, 2004 reliability fix or later vendor-supported update.; Upgrade legacy OpenBSD 3.4 or earlier systems where feasible.; Disable isakmpd where IPsec/IKE is not required..

Prepared: Jun 30, 2026, 06:10 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Mar 25, 2004, 05:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
openbsd-isakmp-integer-underflow(15629)CVE reference · vdb-entry, x_refsource_XF

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/an/an/aListed

Weakness

CWE details

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