# CVE-2009-5016: Integer overflow in n/a

> Remote attackers can bypass XSS and SQL injection protections in PHP's XML extension via crafted overlong UTF-8 strings exploiting an integer overflow.

- **Severity:** Medium 6.8 (`AV:N/AC:M/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** Yes
- **Published:** 12 Nov 2010
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-8fg6-84xm-jg65

## What is CVE-2009-5016?

CVE-2009-5016 is a medium-severity vulnerability in Php Php, published on 12 Nov 2010. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Integer overflow in the xml_utf8_decode function in ext/xml/xml.c in PHP before 5.2.11 makes it easier for remote attackers to bypass cross-site scripting (XSS) and SQL injection protection mechanisms via a crafted string that uses overlong UTF-8 encoding, a different vulnerability than CVE-2010-3870.

Weakness: CWE-189

## Which versions are affected by CVE-2009-5016?

It affects 1 product.


Products: Php Php.

## How do I fix CVE-2009-5016?

Upgrade to a fixed version.

## Is CVE-2009-5016 being exploited?

There is no known exploitation of CVE-2009-5016 in the wild and no public exploit code.

## 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-2009-5016 and fix it if it is affected.

What it is: CVE-2009-5016 is a medium-severity vulnerability in Php Php, published on 12 Nov 2010. 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-2009-5016 in the wild and no public exploit code.

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-2009-5016/ (Markdown: https://insights.sbomify.com/CVE-2009-5016/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-5016
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-5016
- OSV: https://osv.dev/vulnerability/CVE-2009-5016

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-5016/
Summaries are generated and may contain mistakes; the official description above is the record.