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Vulnerability record · CVE-2004-0220 · published 4 May 2004

CVE-2004-0220: Openbsd memory buffer overflow vulnerability

Openbsd · Openbsd

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.

10.0 CVSS 2.0 High EPSS 4.6% · top 8.7% CWE-119 · Memory buffer overflow
10.0CVSS 2.0 base score
4.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
14References
16 Jun 2026Last modified by NVD

Description

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.

AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://marc.info/?l=bugtraq&m=108008530028019&w=2
http://www.kb.cert.org/vuls/id/223273 US Government Resource
http://www.openbsd.org/errata.html Patch
http://www.rapid7.com/advisories/R7-0018.html
http://www.securityfocus.com/bid/9907
http://www.securitytracker.com/alerts/2004/Mar/1009468.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/15629
http://marc.info/?l=bugtraq&m=108008530028019&w=2
http://www.kb.cert.org/vuls/id/223273 US Government Resource
http://www.openbsd.org/errata.html Patch
http://www.rapid7.com/advisories/R7-0018.html
http://www.securityfocus.com/bid/9907
http://www.securitytracker.com/alerts/2004/Mar/1009468.html
https://exchange.xforce.ibmcloud.com/vulnerabilities/15629

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2004-0220), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.