# CVE-2004-0511: Null dereference in n/a

> Attackers can cause a denial of service in MMDF on OpenServer via a null dereference vulnerability.

- **Severity:** Low 2.1 (`AV:L/AC:L/Au:N/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not stated
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Oct 2004
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-5jj6-rgx3-gwpg

## What is CVE-2004-0511?

CVE-2004-0511 is a low-severity vulnerability in Sco Openserver, published on 28 Oct 2004. It can be exploited over the network, with no action from the victim.

### Official description

Multiple unknown vulnerabilities in MMDF on OpenServer 5.0.6 and 5.0.7, and possibly other operating systems, may allow attackers to cause a denial of service by triggering a null dereference.

## Which versions are affected by CVE-2004-0511?

It affects 1 product.


Products: Sco Openserver.

## How do I fix CVE-2004-0511?

No fix has been published for CVE-2004-0511 yet. Limit exposure of the affected software until one is available.

## Is CVE-2004-0511 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2004-0511 exists.

Public exploit code:

- SCO Multi-channel Memorandum Distribution Facility - Multiple Vulnerabilities (exploitdb)

## Other vulnerabilities in Sco Openserver

- [CVE-2000-0306](https://insights.sbomify.com/CVE-2000-0306/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-0072](https://insights.sbomify.com/CVE-2006-0072/): Buffer overflow in termsh on SCO OpenServer 5.0.7 allows remote attackers to execute arbitrary code via a long -o command line argument. (high 7.5)
- [CVE-2004-0390](https://insights.sbomify.com/CVE-2004-0390/): Auth bypass in n/a (high 7.5)
- [CVE-1999-1450](https://insights.sbomify.com/CVE-1999-1450/): Privilege escalation in n/a (high 7.5)
- [CVE-2001-0579](https://insights.sbomify.com/CVE-2001-0579/): Memory corruption in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2004-0511 and fix it if it is affected.

What it is: CVE-2004-0511 is a low-severity vulnerability in Sco Openserver, published on 28 Oct 2004. It can be exploited over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2004-0511 exists.

Affected product: Sco Openserver. 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-2004-0511/ (Markdown: https://insights.sbomify.com/CVE-2004-0511/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2004-0511
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2004-0511
- OSV: https://osv.dev/vulnerability/CVE-2004-0511

---
From sbomify Insights: https://insights.sbomify.com/CVE-2004-0511/
Summaries are generated and may contain mistakes; the official description above is the record.