# CVE-2011-2764: File upload in n/a

> Remote attackers can execute arbitrary code by tricking users into installing a crafted third-party addon containing a Trojan horse DLL due to improper file extension checks.

- **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/A:C`)
- **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:** 4 Aug 2011
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2011-2764, GHSA-2qjf-gm4f-4hxc, UBUNTU-CVE-2011-2764

## What is CVE-2011-2764?

CVE-2011-2764 is a critical vulnerability in n/a, published on 4 Aug 2011. 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

The FS_CheckFilenameIsNotExecutable function in qcommon/files.c in the ioQuake3 engine 1.36 and earlier, as used in World of Padman, Smokin' Guns, OpenArena, Tremulous, and ioUrbanTerror, does not properly determine dangerous file extensions, which allows remote attackers to execute arbitrary code via a crafted third-party addon that creates a Trojan horse DLL file.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2011-2764?

It affects 6 products.


Products: Ioquake3 Ioquake3 Engine, Openarena Openarena, Smokin-Guns Smokin\' Guns, Tremulous Tremulous, Urbanterror Iourbanterror, Worldofpadman World of Padman.

## How do I fix CVE-2011-2764?

Upgrade to a fixed version.

## Is CVE-2011-2764 being exploited?

There is no known exploitation of CVE-2011-2764 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2011-3012](https://insights.sbomify.com/CVE-2011-3012/): File upload in n/a (critical 10.0)
- [CVE-2010-5077](https://insights.sbomify.com/CVE-2010-5077/): Denial of service in n/a (high 7.8)
- [CVE-2011-1412](https://insights.sbomify.com/CVE-2011-1412/): Command injection in n/a (high 7.5)
- [CVE-2012-3345](https://insights.sbomify.com/CVE-2012-3345/): Path traversal in n/a (medium 5.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-2764 and fix it if it is affected.

What it is: CVE-2011-2764 is a critical vulnerability in n/a, published on 4 Aug 2011. 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-2011-2764 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-2011-2764/ (Markdown: https://insights.sbomify.com/CVE-2011-2764/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-2764
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-2764
- OSV: https://osv.dev/vulnerability/CVE-2011-2764

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-2764/
Summaries are generated and may contain mistakes; the official description above is the record.