# CVE-2003-1029: Denial of service in n/a

> Remote attackers can cause a denial of service in tcpdump via a malicious L2TP packet, leading to infinite loops and memory exhaustion.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 15 Jan 2004
- **Updated:** 8 Aug 2024
- **Also known as:** DEBIAN-CVE-2003-1029, GHSA-3h9x-q7vx-j2wh

## What is CVE-2003-1029?

CVE-2003-1029 is a medium-severity denial of service vulnerability in n/a, published on 15 Jan 2004. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

## Which versions are affected by CVE-2003-1029?

It affects 1 product.


Products: Lbl Tcpdump.

## How do I fix CVE-2003-1029?

Upgrade to a fixed version.

## Is CVE-2003-1029 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2003-1029 exists.

Public exploit code:

- Tcpdump 3.x - L2TP Parser Remote Denial of Service (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2000-1026](https://insights.sbomify.com/CVE-2000-1026/): Memory corruption in n/a (critical 10.0)
- [CVE-2001-1279](https://insights.sbomify.com/CVE-2001-1279/): Integer overflow in n/a (high 7.5)
- [CVE-2002-0380](https://insights.sbomify.com/CVE-2002-0380/): Memory corruption in n/a (high 7.5)
- [CVE-2002-1350](https://insights.sbomify.com/CVE-2002-1350/): Denial of service in n/a (high 7.5)
- [CVE-1999-1024](https://insights.sbomify.com/CVE-1999-1024/): Denial of service in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2003-1029 and fix it if it is affected.

What it is: CVE-2003-1029 is a medium-severity denial of service vulnerability in n/a, published on 15 Jan 2004. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2003-1029 exists.

Affected product: n/a. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2003-1029/ (Markdown: https://insights.sbomify.com/CVE-2003-1029/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2003-1029
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2003-1029
- OSV: https://osv.dev/vulnerability/CVE-2003-1029

---
From sbomify Insights: https://insights.sbomify.com/CVE-2003-1029/
Summaries are generated and may contain mistakes; the official description above is the record.