# CVE-2005-2019: Race condition in n/a

> Remote attackers can bypass firewall access restrictions due to a race condition in ipfw table lookups on FreeBSD systems with preemption enabled.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Jun 2005
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-gjxh-r9hc-8vp9

## What is CVE-2005-2019?

CVE-2005-2019 is a medium-severity vulnerability in Freebsd Freebsd, published on 30 Jun 2005. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ipfw in FreeBSD 5.4, when running on Symmetric Multi-Processor (SMP) or Uni Processor (UP) systems with the PREEMPTION kernel option enabled, does not sufficiently lock certain resources while performing table lookups, which can cause the cache results to be corrupted during multiple concurrent lookups, allowing remote attackers to bypass intended access restrictions.

## Which versions are affected by CVE-2005-2019?

It affects 1 product.


Products: Freebsd Freebsd.

## How do I fix CVE-2005-2019?

No fix has been published for CVE-2005-2019 yet. Limit exposure of the affected software until one is available.

## Is CVE-2005-2019 being exploited?

There is no known exploitation of CVE-2005-2019 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-2005-2019 and fix it if it is affected.

What it is: CVE-2005-2019 is a medium-severity vulnerability in Freebsd Freebsd, published on 30 Jun 2005. 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-2005-2019 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-2005-2019/ (Markdown: https://insights.sbomify.com/CVE-2005-2019/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2005-2019
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2005-2019
- OSV: https://osv.dev/vulnerability/CVE-2005-2019

---
From sbomify Insights: https://insights.sbomify.com/CVE-2005-2019/
Summaries are generated and may contain mistakes; the official description above is the record.