# CVE-2007-1644: Auth bypass in n/a

> Remote attackers can bypass authentication to modify DNS records, enabling man-in-the-middle attacks and denial of service on Windows DNS Server.

- **Severity:** Critical 10.0 (`AV:N/AC:L/Au:N/C:C/I:C/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:** 24 Mar 2007
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-qrx5-mvf5-839q

## What is CVE-2007-1644?

CVE-2007-1644 is a critical authentication bypass vulnerability in n/a, published on 24 Mar 2007. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The dynamic DNS update mechanism in the DNS Server service on Microsoft Windows does not properly authenticate clients in certain deployments or configurations, which allows remote attackers to change DNS records for a web proxy server and conduct man-in-the-middle (MITM) attacks on web traffic, conduct pharming attacks by poisoning DNS records, and cause a denial of service (erroneous name resolution).

## Which versions are affected by CVE-2007-1644?

It affects 1 product.


Products: Microsoft All Windows.

## How do I fix CVE-2007-1644?

No fix has been published for CVE-2007-1644 yet. Limit exposure of the affected software until one is available.

## Is CVE-2007-1644 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2007-1644 exists.

Public exploit code:

- Microsoft DNS Server - Dynamic DNS Update/Change (exploitdb)

## Other vulnerabilities in n/a

- [CVE-2003-1392](https://insights.sbomify.com/CVE-2003-1392/): Weak cryptography in n/a (medium 6.6)
- [CVE-2007-2927](https://insights.sbomify.com/CVE-2007-2927/): Unspecified vulnerability in Atheros 802.11 a/b/g wireless adapter drivers before 5.3.0.35, and 6.x before 6.0.3.67, on Windows allows remot (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2007-1644 and fix it if it is affected.

What it is: CVE-2007-1644 is a critical authentication bypass vulnerability in n/a, published on 24 Mar 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-2007-1644 exists.

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-2007-1644/ (Markdown: https://insights.sbomify.com/CVE-2007-1644/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2007-1644
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2007-1644
- OSV: https://osv.dev/vulnerability/CVE-2007-1644

---
From sbomify Insights: https://insights.sbomify.com/CVE-2007-1644/
Summaries are generated and may contain mistakes; the official description above is the record.