# CVE-2006-4616: Null dereference in n/a

> Remote attackers can crash the MailEnable SMTP service by triggering a null pointer exception via SPF lookups on domains with many records.

- **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:** 7 Sep 2006
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-8c6h-67j6-4ffm

## What is CVE-2006-4616?

CVE-2006-4616 is a medium-severity vulnerability in n/a, published on 7 Sep 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

SMTP service in MailEnable Standard, Professional, and Enterprise before ME-10014 (20060904) allows remote attackers to cause a denial of service via an SPF lookup for a domain with a large number of records, which triggers a null pointer exception.

## Which versions are affected by CVE-2006-4616?

It affects 3 products.


Products: Mailenable Mailenable Enterprise, Mailenable Mailenable Professional, Mailenable Mailenable Standard.

## How do I fix CVE-2006-4616?

No fix has been published for CVE-2006-4616 yet. Limit exposure of the affected software until one is available.

## Is CVE-2006-4616 being exploited?

There is no known exploitation of CVE-2006-4616 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2006-6997](https://insights.sbomify.com/CVE-2006-6997/): Weak cryptography in n/a (critical 10.0)
- [CVE-2006-6605](https://insights.sbomify.com/CVE-2006-6605/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-6423](https://insights.sbomify.com/CVE-2006-6423/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-1792](https://insights.sbomify.com/CVE-2006-1792/): Auth bypass in n/a (critical 10.0)
- [CVE-2006-5176](https://insights.sbomify.com/CVE-2006-5176/): Memory corruption in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-4616 and fix it if it is affected.

What it is: CVE-2006-4616 is a medium-severity vulnerability in n/a, published on 7 Sep 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-2006-4616 in the wild and no public exploit code.

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-2006-4616/ (Markdown: https://insights.sbomify.com/CVE-2006-4616/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-4616
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-4616
- OSV: https://osv.dev/vulnerability/CVE-2006-4616

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-4616/
Summaries are generated and may contain mistakes; the official description above is the record.