# CVE-2006-2374: Denial of service in n/a

> Local attackers can cause a system hang in Windows by triggering a deadlock in the SMB driver via a specific ioctl call.

- **Severity:** Medium 5.5 (`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Jun 2006
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-3rmc-m2pw-8q44

## What is CVE-2006-2374?

CVE-2006-2374 is a medium-severity denial of service vulnerability in Microsoft Windows 2000, published on 13 Jun 2006. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The Server Message Block (SMB) driver (MRXSMB.SYS) in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 and earlier allows local users to cause a denial of service (hang) by calling the MrxSmbCscIoctlCloseForCopyChunk with the file handle of the shadow device, which results in a deadlock, aka the "SMB Invalid Handle Vulnerability."

Weakness: CWE-667 (Improper Locking)

## Which versions are affected by CVE-2006-2374?

It affects 3 products.


Products: Microsoft Windows 2000, Microsoft Windows 2003 Server, Microsoft Windows Xp.

## How do I fix CVE-2006-2374?

No fix has been published for CVE-2006-2374 yet. Limit exposure of the affected software until one is available.

## Is CVE-2006-2374 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-2374 exists.

Public exploit code:

- Microsoft SMB Driver - Local Denial of Service (exploitdb)
- Microsoft Windows XP/2000 - 'Mrxsmb.sys' Local Privilege Escalation (MS06-030) (exploitdb)

## Other vulnerabilities in Microsoft Windows 2000

- [CVE-2008-4250](https://insights.sbomify.com/CVE-2008-4250/): Microsoft Windows Buffer Overflow (critical 9.8, exploited in the wild)
- [CVE-2010-0232](https://insights.sbomify.com/CVE-2010-0232/): Microsoft Windows Kernel Exception Handler (high 7.8, exploited in the wild)
- [CVE-2009-1123](https://insights.sbomify.com/CVE-2009-1123/): Microsoft Windows Improper Input Validation (high 7.8, exploited in the wild)
- [CVE-2002-0367](https://insights.sbomify.com/CVE-2002-0367/): Microsoft Windows Privilege Escalation (high 7.8, exploited in the wild)
- [CVE-2010-0269](https://insights.sbomify.com/CVE-2010-0269/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-2374 and fix it if it is affected.

What it is: CVE-2006-2374 is a medium-severity denial of service vulnerability in Microsoft Windows 2000, published on 13 Jun 2006. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-2374 exists.

Affected product: Microsoft Windows 2000. 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-2006-2374/ (Markdown: https://insights.sbomify.com/CVE-2006-2374/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-2374
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-2374
- OSV: https://osv.dev/vulnerability/CVE-2006-2374

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-2374/
Summaries are generated and may contain mistakes; the official description above is the record.