# CVE-2009-0841: Path traversal in n/a

> Remote attackers can create arbitrary files on Windows systems running MapServer with Cygwin via directory traversal in the id parameter.

- **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:** Not needed
- **Fix available:** Yes
- **Published:** 31 Mar 2009
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2009-0841, GHSA-jrh8-99hv-m6mp

## What is CVE-2009-0841?

CVE-2009-0841 is a critical path traversal vulnerability in n/a, published on 31 Mar 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Directory traversal vulnerability in mapserv.c in mapserv in MapServer 4.x before 4.10.4 and 5.x before 5.2.2, when running on Windows with Cygwin, allows remote attackers to create arbitrary files via a .. (dot dot) in the id parameter.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2009-0841?

It affects 2 products.


Products: Osgeo Mapserver, Umn Mapserver.

## How do I fix CVE-2009-0841?

Upgrade to a fixed version.

## Is CVE-2009-0841 being exploited?

There is no known exploitation of CVE-2009-0841 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2010-2540](https://insights.sbomify.com/CVE-2010-2540/): Security feature bypass in n/a (critical 10.0)
- [CVE-2009-2281](https://insights.sbomify.com/CVE-2009-2281/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-0839](https://insights.sbomify.com/CVE-2009-0839/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-0840](https://insights.sbomify.com/CVE-2009-0840/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-1176](https://insights.sbomify.com/CVE-2009-1176/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-0841 and fix it if it is affected.

What it is: CVE-2009-0841 is a critical path traversal vulnerability in n/a, published on 31 Mar 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2009-0841 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-2009-0841/ (Markdown: https://insights.sbomify.com/CVE-2009-0841/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-0841
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-0841
- OSV: https://osv.dev/vulnerability/CVE-2009-0841

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-0841/
Summaries are generated and may contain mistakes; the official description above is the record.