# CVE-2004-0002: Denial of service in n/a

> Remote attackers can cause denial of service via resource exhaustion in the TCP MSS functionality by sending crafted packets.

- **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Feb 2004
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-w58r-2p42-8hcv

## What is CVE-2004-0002?

CVE-2004-0002 is a critical denial of service vulnerability in Freebsd Freebsd, published on 3 Feb 2004. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The TCP MSS (maximum segment size) functionality in netinet allows remote attackers to cause a denial of service (resource exhaustion) via (1) a low MTU, which causes a large number of small packets to be produced, or (2) via a large number of packets with a small TCP payload, which cause a large number of calls to the resource-intensive sowakeup function.

## Which versions are affected by CVE-2004-0002?

It affects 1 product.


Products: Freebsd Freebsd.

## How do I fix CVE-2004-0002?

No fix has been published for CVE-2004-0002 yet. Limit exposure of the affected software until one is available.

## Is CVE-2004-0002 being exploited?

There is no known exploitation of CVE-2004-0002 in the wild and no public exploit code.

## Other vulnerabilities in Freebsd Freebsd

- [CVE-2018-17160](https://insights.sbomify.com/CVE-2018-17160/): Memory corruption in FreeBSD (critical 10.0)
- [CVE-2014-3954](https://insights.sbomify.com/CVE-2014-3954/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-4304](https://insights.sbomify.com/CVE-2006-4304/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-0226](https://insights.sbomify.com/CVE-2006-0226/): Integer overflow in n/a (critical 10.0)
- [CVE-2001-0969](https://insights.sbomify.com/CVE-2001-0969/): Security feature bypass in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2004-0002 and fix it if it is affected.

What it is: CVE-2004-0002 is a critical denial of service vulnerability in Freebsd Freebsd, published on 3 Feb 2004. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2004-0002 in the wild and no public exploit code.

Affected product: Freebsd Freebsd. 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-2004-0002/ (Markdown: https://insights.sbomify.com/CVE-2004-0002/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2004-0002
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2004-0002
- OSV: https://osv.dev/vulnerability/CVE-2004-0002

---
From sbomify Insights: https://insights.sbomify.com/CVE-2004-0002/
Summaries are generated and may contain mistakes; the official description above is the record.