# CVE-2014-8091: Null dereference in n/a

> Remote attackers can crash the X.Org server via a crafted connection request when SUN-DES-1 authentication is enabled, causing denial of service.

- **Severity:** Medium 4.3 (`AV:N/AC:M/Au:N/C:N/I:N/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:** 10 Dec 2014
- **Updated:** 6 Aug 2024
- **Also known as:** DEBIAN-CVE-2014-8091, GHSA-3443-38jq-4qwq, UBUNTU-CVE-2014-8091

## What is CVE-2014-8091?

CVE-2014-8091 is a medium-severity vulnerability in X.org X Server, published on 10 Dec 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

X.Org X Window System (aka X11 and X) X11R5 and X.Org Server (aka xserver and xorg-server) before 1.16.3, when using SUN-DES-1 (Secure RPC) authentication credentials, does not check the return value of a malloc call, which allows remote attackers to cause a denial of service (NULL pointer dereference and server crash) via a crafted connection request.

## Which versions are affected by CVE-2014-8091?

It affects 2 products.


Products: X.org X11, X.org X Server.

## How do I fix CVE-2014-8091?

Upgrade to a fixed version.

## Is CVE-2014-8091 being exploited?

There is no known exploitation of CVE-2014-8091 in the wild and no public exploit code.

## Other vulnerabilities in X.org X Server

- [CVE-2012-2118](https://insights.sbomify.com/CVE-2012-2118/): Memory corruption in n/a (critical 10.0)
- [CVE-1999-0526](https://insights.sbomify.com/CVE-1999-0526/): Misconfiguration in n/a (critical 10.0)
- [CVE-2007-1003](https://insights.sbomify.com/CVE-2007-1003/): Integer overflow in n/a (critical 9.0)
- [CVE-2014-8092](https://insights.sbomify.com/CVE-2014-8092/): Integer overflow in n/a (medium 6.5)
- [CVE-2014-8093](https://insights.sbomify.com/CVE-2014-8093/): Integer overflow in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2014-8091 and fix it if it is affected.

What it is: CVE-2014-8091 is a medium-severity vulnerability in X.org X Server, published on 10 Dec 2014. 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-2014-8091 in the wild and no public exploit code.

Affected product: X.org X Server. 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-2014-8091/ (Markdown: https://insights.sbomify.com/CVE-2014-8091/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2014-8091
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2014-8091
- OSV: https://osv.dev/vulnerability/CVE-2014-8091

---
From sbomify Insights: https://insights.sbomify.com/CVE-2014-8091/
Summaries are generated and may contain mistakes; the official description above is the record.