# CVE-2006-4521: Memory corruption in n/a

> Remote attackers can cause a denial of service in Novell eDirectory via a crafted login request due to improper pointer handling.

- **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:** No
- **Published:** 4 Nov 2006
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-f4wj-v76w-rxmp

## What is CVE-2006-4521?

CVE-2006-4521 is a medium-severity memory corruption vulnerability in Novell Edirectory, published on 4 Nov 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The BerDecodeLoginDataRequest function in the libnmasldap.so NMAS module in Novell eDirectory 8.8 and 8.8.1 before the Security Services 2.0.3 patch does not properly increment a pointer when handling certain input, which allows remote attackers to cause a denial of service (invalid memory access) via a crafted login request.

## Which versions are affected by CVE-2006-4521?

It affects 1 product.


Products: Novell Edirectory.

## How do I fix CVE-2006-4521?

No fix has been published for CVE-2006-4521 yet. Limit exposure of the affected software until one is available.

## Is CVE-2006-4521 being exploited?

There is no known exploitation of CVE-2006-4521 in the wild and no public exploit code.

## Other vulnerabilities in Novell Edirectory

- [CVE-2009-0895](https://insights.sbomify.com/CVE-2009-0895/): Integer overflow in n/a (critical 10.0)
- [CVE-2008-5091](https://insights.sbomify.com/CVE-2008-5091/): Memory corruption in n/a (critical 10.0)
- [CVE-2008-5092](https://insights.sbomify.com/CVE-2008-5092/): Memory corruption in n/a (critical 10.0)
- [CVE-2008-5094](https://insights.sbomify.com/CVE-2008-5094/): Memory corruption in n/a (critical 10.0)
- [CVE-2008-4478](https://insights.sbomify.com/CVE-2008-4478/): Integer overflow in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-4521 and fix it if it is affected.

What it is: CVE-2006-4521 is a medium-severity memory corruption vulnerability in Novell Edirectory, published on 4 Nov 2006. 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-2006-4521 in the wild and no public exploit code.

Affected product: Novell Edirectory. 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-2006-4521/ (Markdown: https://insights.sbomify.com/CVE-2006-4521/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-4521
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-4521
- OSV: https://osv.dev/vulnerability/CVE-2006-4521

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-4521/
Summaries are generated and may contain mistakes; the official description above is the record.