# CVE-1999-0140: Denial of service in n/a

> Attackers can cause a denial of service in the RAS/PPTP service on Windows NT systems.

- **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 stated
- **Attackable:** Over the internet
- **Victim action needed:** Not stated
- **Fix available:** No
- **Published:** 4 Feb 2000
- **Updated:** 1 Aug 2024
- **Also known as:** GHSA-fg49-hp4g-2h7r

## What is CVE-1999-0140?

CVE-1999-0140 is a medium-severity denial of service vulnerability in Microsoft Windows Nt, published on 4 Feb 2000. It can be exploited over the network.

### Official description

Denial of service in RAS/PPTP on NT systems.

## Which versions are affected by CVE-1999-0140?

It affects 1 product.


Products: Microsoft Windows Nt.

## How do I fix CVE-1999-0140?

No fix has been published for CVE-1999-0140 yet. Limit exposure of the affected software until one is available.

## Is CVE-1999-0140 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-1999-0140 exists.

Public exploit code:

- Microsoft NT 4.0 RAS/PPTP - Malformed Control Packet Denial of Service (exploitdb)

## Other vulnerabilities in Microsoft Windows Nt

- [CVE-2004-0900](https://insights.sbomify.com/CVE-2004-0900/): The DHCP Server service for Microsoft Windows NT 4.0 Server and Terminal Server Edition does not properly validate the length of certain mes (critical 10.0)
- [CVE-2001-0045](https://insights.sbomify.com/CVE-2001-0045/): The default permissions for the RAS Administration key in Windows NT 4.0 allows local users to execute arbitrary commands by changing the va (critical 10.0)
- [CVE-1999-0119](https://insights.sbomify.com/CVE-1999-0119/): Windows NT 4.0 beta allows users to read and delete shares. (critical 10.0)
- [CVE-1999-0226](https://insights.sbomify.com/CVE-1999-0226/): Denial of service in n/a (critical 10.0)
- [CVE-1999-0285](https://insights.sbomify.com/CVE-1999-0285/): Denial of service in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-1999-0140 and fix it if it is affected.

What it is: CVE-1999-0140 is a medium-severity denial of service vulnerability in Microsoft Windows Nt, published on 4 Feb 2000. It can be exploited over the network.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-1999-0140 exists.

Affected product: Microsoft Windows Nt. 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-1999-0140/ (Markdown: https://insights.sbomify.com/CVE-1999-0140/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-1999-0140
- NVD: https://nvd.nist.gov/vuln/detail/CVE-1999-0140
- OSV: https://osv.dev/vulnerability/CVE-1999-0140

---
From sbomify Insights: https://insights.sbomify.com/CVE-1999-0140/
Summaries are generated and may contain mistakes; the official description above is the record.