# CVE-2001-1244: Denial of service in n/a

> Remote attackers can cause denial of service by exploiting small MSS values to amplify network traffic and exhaust server resources.

- **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:** No
- **Published:** 3 May 2002
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-g5fj-94hx-c37v

## What is CVE-2001-1244?

CVE-2001-1244 is a medium-severity denial of service vulnerability in Freebsd Freebsd, published on 3 May 2002. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Multiple TCP implementations could allow remote attackers to cause a denial of service (bandwidth and CPU exhaustion) by setting the maximum segment size (MSS) to a very small number and requesting large amounts of data, which generates more packets with less TCP-level data that amplify network traffic and consume more server CPU to process.

## Which versions are affected by CVE-2001-1244?

It affects 9 products.


Products: Freebsd Freebsd, Hp Hp-Ux, Hp Vvos, Linux kernel, Microsoft Windows 2000, Microsoft Windows Nt, Netbsd Netbsd, Openbsd Openbsd, Sun Sunos.

## How do I fix CVE-2001-1244?

No fix has been published for CVE-2001-1244 yet. Limit exposure of the affected software until one is available.

## Is CVE-2001-1244 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2001-1244 exists.

Public exploit code:

- HP-UX 11 / Linux Kernel 2.4 / Windows 2000/NT 4.0 / IRIX 6.5 - Small TCP MSS Denial of Service (exploitdb)

## 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-2004-0002](https://insights.sbomify.com/CVE-2004-0002/): Denial of service in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2001-1244 and fix it if it is affected.

What it is: CVE-2001-1244 is a medium-severity denial of service vulnerability in Freebsd Freebsd, published on 3 May 2002. 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-2001-1244 exists.

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-2001-1244/ (Markdown: https://insights.sbomify.com/CVE-2001-1244/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2001-1244
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2001-1244
- OSV: https://osv.dev/vulnerability/CVE-2001-1244

---
From sbomify Insights: https://insights.sbomify.com/CVE-2001-1244/
Summaries are generated and may contain mistakes; the official description above is the record.