# CVE-2009-4007: Denial of service in n/a

> Remote attackers can crash the OpenTTD game daemon by performing specific actions with wagons and engines, requiring a game update.

- **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:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 28 Dec 2009
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2009-4007, GHSA-rgch-67h8-w759

## What is CVE-2009-4007?

CVE-2009-4007 is a medium-severity denial of service vulnerability in n/a, published on 28 Dec 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Unspecified vulnerability in the NormaliseTrainConsist function in src/train_cmd.cpp in OpenTTD before 0.7.5-RC1 allows remote attackers to cause a denial of service (daemon crash) via certain game actions involving a wagon and a dual-headed engine.

## Which versions are affected by CVE-2009-4007?

It affects 1 product.


Products: Openttd Openttd.

## How do I fix CVE-2009-4007?

Upgrade to a fixed version.

## Is CVE-2009-4007 being exploited?

There is no known exploitation of CVE-2009-4007 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2008-3576](https://insights.sbomify.com/CVE-2008-3576/): Memory corruption in n/a (critical 10.0)
- [CVE-2008-3547](https://insights.sbomify.com/CVE-2008-3547/): Memory corruption in n/a (critical 9.0)
- [CVE-2011-3341](https://insights.sbomify.com/CVE-2011-3341/): Integer overflow in n/a (high 7.5)
- [CVE-2011-3342](https://insights.sbomify.com/CVE-2011-3342/): Memory corruption in n/a (high 7.5)
- [CVE-2005-2764](https://insights.sbomify.com/CVE-2005-2764/): Memory corruption in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-4007 and fix it if it is affected.

What it is: CVE-2009-4007 is a medium-severity denial of service vulnerability in n/a, published on 28 Dec 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2009-4007 in the wild and no public exploit code.

Affected product: n/a. 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-2009-4007/ (Markdown: https://insights.sbomify.com/CVE-2009-4007/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-4007
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-4007
- OSV: https://osv.dev/vulnerability/CVE-2009-4007

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-4007/
Summaries are generated and may contain mistakes; the official description above is the record.