# CVE-2007-0955: Denial of service in n/a

> Remote attackers can crash the MailEnable IMAP service by sending malformed base64 data, causing a denial of service.

- **Severity:** High 7.8 (`AV:N/AC:L/Au:N/C:N/I:N/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Feb 2007
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-5ww6-rrrm-6m3x

## What is CVE-2007-0955?

CVE-2007-0955 is a high-severity denial of service vulnerability in Mailenable Mailenable, published on 15 Feb 2007. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The NTLM_UnPack_Type3 function in MENTLM.dll in MailEnable Professional 2.35 and earlier allows remote attackers to cause a denial of service (application crash) via certain base64-encoded data following an AUTHENTICATE NTLM command to the imap port (143/tcp), which results in an out-of-bounds read.

## Which versions are affected by CVE-2007-0955?

It affects 1 product.


Products: Mailenable Mailenable.

## How do I fix CVE-2007-0955?

No fix has been published for CVE-2007-0955 yet. Limit exposure of the affected software until one is available.

## Is CVE-2007-0955 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-0955 exists.

Public exploit code:

- MailEnable Professional/Enterprise 2.35 - Out of Bounds Denial of Service (exploitdb)
- MailEnable Professional/Enterprise 2.37 - Denial of Service (exploitdb)

## Other vulnerabilities in Mailenable Mailenable

- [CVE-2015-9280](https://insights.sbomify.com/CVE-2015-9280/): XML external entity in n/a (critical 10.0)
- [CVE-2025-44148](https://insights.sbomify.com/CVE-2025-44148/): Cross-site scripting in n/a (critical 9.8)
- [CVE-2019-12924](https://insights.sbomify.com/CVE-2019-12924/): XML external entity in n/a (critical 9.8)
- [CVE-2015-9278](https://insights.sbomify.com/CVE-2015-9278/): MailEnable before 8.60 allows Privilege Escalation because admin accounts could be created as a consequence of %0A mishandling in AUTH.TAB a (critical 9.8)
- [CVE-2015-9277](https://insights.sbomify.com/CVE-2015-9277/): Path traversal in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2007-0955 and fix it if it is affected.

What it is: CVE-2007-0955 is a high-severity denial of service vulnerability in Mailenable Mailenable, published on 15 Feb 2007. 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-2007-0955 exists.

Affected product: Mailenable Mailenable. 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-2007-0955/ (Markdown: https://insights.sbomify.com/CVE-2007-0955/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2007-0955
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2007-0955
- OSV: https://osv.dev/vulnerability/CVE-2007-0955

---
From sbomify Insights: https://insights.sbomify.com/CVE-2007-0955/
Summaries are generated and may contain mistakes; the official description above is the record.