# CVE-2006-6731: Memory corruption in n/a

> Buffer overflows in Java AWT and font libraries allow attackers to execute arbitrary code or access local files via malicious Java applets.

- **Severity:** Critical 9.3 (`AV:N/AC:M/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:** A user has to click or open something
- **Fix available:** Yes
- **Published:** 26 Dec 2006
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-mqqx-775h-25rp

## What is CVE-2006-6731?

CVE-2006-6731 is a critical memory corruption vulnerability in Sun Jdk, published on 26 Dec 2006. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Multiple buffer overflows in Sun Java Development Kit (JDK) and Java Runtime Environment (JRE) 5.0 Update 7 and earlier, Java System Development Kit (SDK) and JRE 1.4.2_12 and earlier 1.4.x versions, and SDK and JRE 1.3.1_18 and earlier allow attackers to develop Java applets that read, write, or execute local files, possibly related to (1) integer overflows in the Java_sun_awt_image_ImagingLib_convolveBI, awt_parseRaster, and awt_parseColorModel functions; (2) a stack overflow in the Java_sun_awt_image_ImagingLib_lookupByteRaster function; and (3) improper handling of certain negative values in the Java_sun_font_SunLayoutEngine_nativeLayout function.  NOTE: some of these details are obtained from third party information.

## Which versions are affected by CVE-2006-6731?

It affects 3 products.


Products: Sun Jdk, Sun Jre, Sun Sdk.

## How do I fix CVE-2006-6731?

Upgrade to a fixed version.

## Is CVE-2006-6731 being exploited?

There is no known exploitation of CVE-2006-6731 in the wild and no public exploit code.

## Other vulnerabilities in Sun Jdk

- [CVE-2011-3521](https://insights.sbomify.com/CVE-2011-3521/): Deserialization in n/a (critical 10.0)
- [CVE-2011-3548](https://insights.sbomify.com/CVE-2011-3548/): Other in n/a (critical 10.0)
- [CVE-2011-3549](https://insights.sbomify.com/CVE-2011-3549/): Other in n/a (critical 10.0)
- [CVE-2011-3554](https://insights.sbomify.com/CVE-2011-3554/): Other in n/a (critical 10.0)
- [CVE-2011-0802](https://insights.sbomify.com/CVE-2011-0802/): Other in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-6731 and fix it if it is affected.

What it is: CVE-2006-6731 is a critical memory corruption vulnerability in Sun Jdk, published on 26 Dec 2006. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2006-6731 in the wild and no public exploit code.

Affected product: Sun Jdk. 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-2006-6731/ (Markdown: https://insights.sbomify.com/CVE-2006-6731/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-6731
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-6731
- OSV: https://osv.dev/vulnerability/CVE-2006-6731

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-6731/
Summaries are generated and may contain mistakes; the official description above is the record.