# CVE-2009-4048: Race condition in n/a

> Authenticated remote attackers can crash the XM Easy Personal FTP Server via a race condition involving concurrent APPE and DELE commands.

- **Severity:** Medium 4.0 (`AV:N/AC:L/Au:S/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Nov 2009
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-52wq-5924-vg5p

## What is CVE-2009-4048?

CVE-2009-4048 is a medium-severity vulnerability in n/a, published on 23 Nov 2009. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Dxmsoft XM Easy Personal FTP Server 5.8.0 allows remote authenticated users to cause a denial of service (daemon outage) via an APPE command to one socket in conjunction with a DELE command to a second socket.

## Which versions are affected by CVE-2009-4048?

It affects 1 product.


Products: Dxmsoft Xm Easy Personal Ftp Server.

## How do I fix CVE-2009-4048?

No fix has been published for CVE-2009-4048 yet. Limit exposure of the affected software until one is available.

## Is CVE-2009-4048 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-4048 exists.

Public exploit code:

- XM Easy Personal FTP Server - 'APPE' / 'DELE' Denial of Service (exploitdb)
- XM Easy Personal FTP Server 5.8.0 - Remote Denial of Service (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2007-1195](https://insights.sbomify.com/CVE-2007-1195/): Memory corruption in n/a (high 7.5)
- [CVE-2006-2225](https://insights.sbomify.com/CVE-2006-2225/): Memory corruption in n/a (high 7.5)
- [CVE-2009-3643](https://insights.sbomify.com/CVE-2009-3643/): Denial of service in n/a (medium 5.0)
- [CVE-2006-6750](https://insights.sbomify.com/CVE-2006-6750/): Memory corruption in n/a (medium 5.0)
- [CVE-2006-6751](https://insights.sbomify.com/CVE-2006-6751/): Denial of service in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-4048 and fix it if it is affected.

What it is: CVE-2009-4048 is a medium-severity vulnerability in n/a, published on 23 Nov 2009. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-4048 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-2009-4048/ (Markdown: https://insights.sbomify.com/CVE-2009-4048/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-4048
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-4048
- OSV: https://osv.dev/vulnerability/CVE-2009-4048

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-4048/
Summaries are generated and may contain mistakes; the official description above is the record.