# CVE-2006-0047: Denial of service in n/a

> Remote attackers can crash the Freeciv server by sending crafted packets with negative compressed size values, requiring an upgrade to fix.

- **Severity:** Medium 5.0 (`AV:N/AC:L/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:** 7 Mar 2006
- **Updated:** 7 Aug 2024
- **Also known as:** DEBIAN-CVE-2006-0047, DSA-994-1, GHSA-c6gj-v86g-r7jw, openSUSE-SU-2024:10765-1

## What is CVE-2006-0047?

CVE-2006-0047 is a medium-severity denial of service vulnerability in n/a, published on 7 Mar 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

packets.c in Freeciv 2.0 before 2.0.8 allows remote attackers to cause a denial of service (server crash) via crafted packets with negative compressed size values.

Weakness: CWE-399, CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2006-0047?

It affects 1 product.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `freeciv` | openSUSE:Tumbleweed | All versions | 2.6.5-1.2 |

Products: Freeciv Freeciv.

## How do I fix CVE-2006-0047?

Upgrade to a fixed version.

## Is CVE-2006-0047 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-0047 exists.

Public exploit code:

- Freeciv 2.0.7 - Jumbo Malloc Crash (Denial of Service) (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2010-2445](https://insights.sbomify.com/CVE-2010-2445/): Code injection in n/a (critical 10.0)
- [CVE-2022-39047](https://insights.sbomify.com/CVE-2022-39047/): Memory corruption in n/a (high 8.8)
- [CVE-2012-6083](https://insights.sbomify.com/CVE-2012-6083/): Denial of service in freeciv (high 7.5)
- [CVE-2006-3913](https://insights.sbomify.com/CVE-2006-3913/): Memory corruption in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-0047 and fix it if it is affected.

What it is: CVE-2006-0047 is a medium-severity denial of service vulnerability in n/a, published on 7 Mar 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-0047 exists.

Affected product: n/a. 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-2006-0047/ (Markdown: https://insights.sbomify.com/CVE-2006-0047/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-0047
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-0047
- OSV: https://osv.dev/vulnerability/CVE-2006-0047

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-0047/
Summaries are generated and may contain mistakes; the official description above is the record.