# CVE-2011-4091: Missing authorization in n/a

> Remote attackers can access sensitive user data like usage patterns and preferences without authentication due to missing checks in libnet6.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:P/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Feb 2014
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-2hm9-33m6-xf92

## What is CVE-2011-4091?

CVE-2011-4091 is a medium-severity missing authorization vulnerability in Opensuse Opensuse, published on 10 Feb 2014. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The libobby server in inc/server.hpp in libnet6 (aka net6) before 1.3.14 does not perform authentication before checking the user name, which allows remote attackers to obtain sensitive information such as server-usage patterns by a particular user and color preferences.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2011-4091?

It affects 3 products.


Products: Armin Burgmeier Net6, Opensuse Opensuse, Oracle Solaris.

## How do I fix CVE-2011-4091?

No fix has been published for CVE-2011-4091 yet. Limit exposure of the affected software until one is available.

## Is CVE-2011-4091 being exploited?

There is no known exploitation of CVE-2011-4091 in the wild and no public exploit code.

## Other vulnerabilities in Opensuse Opensuse

- [CVE-2011-4093](https://insights.sbomify.com/CVE-2011-4093/): Integer overflow in n/a (medium 5.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-4091 and fix it if it is affected.

What it is: CVE-2011-4091 is a medium-severity missing authorization vulnerability in Opensuse Opensuse, published on 10 Feb 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-2011-4091 in the wild and no public exploit code.

Affected product: Opensuse Opensuse. 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-2011-4091/ (Markdown: https://insights.sbomify.com/CVE-2011-4091/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-4091
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-4091
- OSV: https://osv.dev/vulnerability/CVE-2011-4091

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-4091/
Summaries are generated and may contain mistakes; the official description above is the record.