# CVE-2009-10006: UFO: Alien Invasion <= 2.2.1 IRC Client Buffer Overflow

> A stack-based buffer overflow in the game's IRC client allows arbitrary code execution when connecting to a malicious server.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Aug 2025
- **Updated:** 15 May 2026
- **Also known as:** GHSA-mj5x-v9m2-c9jh

## What is CVE-2009-10006?

CVE-2009-10006 is a critical memory corruption vulnerability in UFO: Alien Invasion, published on 22 Aug 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

UFO: Alien Invasion versions up to and including 2.2.1 contain a buffer overflow vulnerability in its built-in IRC client component. When the client connects to an IRC server and receives a crafted numeric reply (specifically a 001 message), the application fails to properly validate the length of the response string. This results in a stack-based buffer overflow, which may corrupt control flow structures and allow arbitrary code execution. The vulnerability is triggered during automatic IRC connection handling and does not require user interaction beyond launching the game.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2009-10006?


## How do I fix CVE-2009-10006?

No fix has been published for CVE-2009-10006 yet. Limit exposure of the affected software until one is available.

## Is CVE-2009-10006 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-10006 exists.

Public exploit code:

- UFO: Alien Invasion IRC Client Buffer Overflow (metasploit)
- UFO: Alien Invasion IRC Client Buffer Overflow (metasploit)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-10006 and fix it if it is affected.

What it is: CVE-2009-10006 is a critical memory corruption vulnerability in UFO: Alien Invasion, published on 22 Aug 2025. 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-2009-10006 exists.

Affected product: UFO: Alien Invasion. 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-2009-10006/ (Markdown: https://insights.sbomify.com/CVE-2009-10006/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-10006
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-10006
- OSV: https://osv.dev/vulnerability/CVE-2009-10006

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-10006/
Summaries are generated and may contain mistakes; the official description above is the record.