# CVE-2004-2466: Denial of service in n/a

> Remote attackers can crash Easy Chat Server by sending a long username parameter, causing a denial of service.

- **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:** 20 Aug 2005
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-c4gx-wr5p-7v7x

## What is CVE-2004-2466?

CVE-2004-2466 is a medium-severity denial of service vulnerability in n/a, published on 20 Aug 2005. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

chat.ghp in Easy Chat Server 1.2 allows remote attackers to cause a denial of service (server crash) via a long username parameter, possibly due to a buffer overflow.  NOTE: it was later reported that 2.2 is also affected.

Weakness: CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer)

## Which versions are affected by CVE-2004-2466?

It affects 1 product.


Products: Efs Software Easy Chat Server.

## How do I fix CVE-2004-2466?

No fix has been published for CVE-2004-2466 yet. Limit exposure of the affected software until one is available.

## Is CVE-2004-2466 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2004-2466 exists.

Public exploit code:

- EFS Easy Chat Server 2.2 - Remote Denial of Service (exploitdb)
- EFS Easy Chat Server Authentication Request Handling Buffer Overflow (metasploit)
- EFS Easy Chat Server - Authentication Request Handling Buffer Overflow (Metasploit) (exploitdb)
- EFS Easy Chat Server 3.1 - Remote Stack Buffer Overflow (exploitdb)
- Easy Chat Server 3.1 - Remote Stack Buffer Overflow (SEH) (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2006-6933](https://insights.sbomify.com/CVE-2006-6933/): Information disclosure in n/a (high 7.8)
- [CVE-2004-2467](https://insights.sbomify.com/CVE-2004-2467/): Denial of service in n/a (medium 5.0)
- [CVE-2004-2465](https://insights.sbomify.com/CVE-2004-2465/): Cross-site scripting in n/a (medium 4.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2004-2466 and fix it if it is affected.

What it is: CVE-2004-2466 is a medium-severity denial of service vulnerability in n/a, published on 20 Aug 2005. 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-2004-2466 exists.

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-2004-2466/ (Markdown: https://insights.sbomify.com/CVE-2004-2466/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2004-2466
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2004-2466
- OSV: https://osv.dev/vulnerability/CVE-2004-2466

---
From sbomify Insights: https://insights.sbomify.com/CVE-2004-2466/
Summaries are generated and may contain mistakes; the official description above is the record.