# CVE-2006-0381: Denial of service in n/a

> Remote attackers can crash FreeBSD or OpenBSD systems by sending crafted packets when specific IP fragment scrubbing rules are enabled.

- **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:** 25 Jan 2006
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-4x4x-qj57-37wg

## What is CVE-2006-0381?

CVE-2006-0381 is a medium-severity denial of service vulnerability in Freebsd Freebsd, published on 25 Jan 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A logic error in the IP fragment cache functionality in pf in FreeBSD 5.3, 5.4, and 6.0, and OpenBSD, when a 'scrub fragment crop' or 'scrub fragment drop-ovl' rule is being used, allows remote attackers to cause a denial of service (crash) via crafted packets that cause a packet fragment to be inserted twice.

## Which versions are affected by CVE-2006-0381?

It affects 1 product.


Products: Freebsd Freebsd.

## How do I fix CVE-2006-0381?

No fix has been published for CVE-2006-0381 yet. Limit exposure of the affected software until one is available.

## Is CVE-2006-0381 being exploited?

There is no known exploitation of CVE-2006-0381 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-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-2006-0381 and fix it if it is affected.

What it is: CVE-2006-0381 is a medium-severity denial of service vulnerability in Freebsd Freebsd, published on 25 Jan 2006. 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-2006-0381 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-2006-0381/ (Markdown: https://insights.sbomify.com/CVE-2006-0381/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-0381
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-0381
- OSV: https://osv.dev/vulnerability/CVE-2006-0381

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-0381/
Summaries are generated and may contain mistakes; the official description above is the record.