# CVE-2000-0440: Denial of service in n/a

> Remote attackers can cause a denial of service in NetBSD by sending packets with unaligned IP timestamp options.

- **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:** 13 Oct 2000
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-3fw7-2f85-c369

## What is CVE-2000-0440?

CVE-2000-0440 is a medium-severity denial of service vulnerability in Freebsd Freebsd, published on 13 Oct 2000. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

NetBSD 1.4.2 and earlier allows remote attackers to cause a denial of service by sending a packet with an unaligned IP timestamp option.

## Which versions are affected by CVE-2000-0440?

It affects 2 products.


Products: Freebsd Freebsd, Netbsd Netbsd.

## How do I fix CVE-2000-0440?

No fix has been published for CVE-2000-0440 yet. Limit exposure of the affected software until one is available.

## Is CVE-2000-0440 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2000-0440 exists.

Public exploit code:

- FreeBSD 3.4/4.0/5.0 / NetBSD 1.4 - Unaligned IP Option 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-2000-0440 and fix it if it is affected.

What it is: CVE-2000-0440 is a medium-severity denial of service vulnerability in Freebsd Freebsd, published on 13 Oct 2000. 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-2000-0440 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-2000-0440/ (Markdown: https://insights.sbomify.com/CVE-2000-0440/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2000-0440
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2000-0440
- OSV: https://osv.dev/vulnerability/CVE-2000-0440

---
From sbomify Insights: https://insights.sbomify.com/CVE-2000-0440/
Summaries are generated and may contain mistakes; the official description above is the record.