# CVE-2009-0754: Security feature bypass in n/a

> Local users can bypass security restrictions and affect other virtual hosts by modifying mbstring.func_overload in .htaccess files.

- **Severity:** Low 2.1 (`AV:L/AC:L/Au:N/C:N/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 3 Mar 2009
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-mv3x-q5p2-7h93

## What is CVE-2009-0754?

CVE-2009-0754 is a low-severity vulnerability in Php Php, published on 3 Mar 2009. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

PHP 4.4.4, 5.1.6, and other versions, when running on Apache, allows local users to modify behavior of other sites hosted on the same web server by modifying the mbstring.func_overload setting within .htaccess, which causes this setting to be applied to other virtual hosts on the same server.

Weakness: CWE-134 (Use of Externally-Controlled Format String)

## Which versions are affected by CVE-2009-0754?

It affects 1 product.


Products: Php Php.

## How do I fix CVE-2009-0754?

Apply the vendor's patch.

## Is CVE-2009-0754 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-0754 exists.

Public exploit code:

- PHP 5.2.5 - 'mbstring.func_overload' WebServer Denial of Service (exploitdb)

## Other vulnerabilities in Php Php

- [CVE-2012-2688](https://insights.sbomify.com/CVE-2012-2688/): Integer overflow in n/a (critical 10.0)
- [CVE-2012-2376](https://insights.sbomify.com/CVE-2012-2376/): Memory corruption in n/a (critical 10.0)
- [CVE-2011-3268](https://insights.sbomify.com/CVE-2011-3268/): Memory corruption in n/a (critical 10.0)
- [CVE-2009-4143](https://insights.sbomify.com/CVE-2009-4143/): Other in n/a (critical 10.0)
- [CVE-2008-5557](https://insights.sbomify.com/CVE-2008-5557/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-0754 and fix it if it is affected.

What it is: CVE-2009-0754 is a low-severity vulnerability in Php Php, published on 3 Mar 2009. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2009-0754 exists.

Affected product: Php Php. 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-2009-0754/ (Markdown: https://insights.sbomify.com/CVE-2009-0754/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-0754
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-0754
- OSV: https://osv.dev/vulnerability/CVE-2009-0754

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-0754/
Summaries are generated and may contain mistakes; the official description above is the record.