# CVE-2011-1965: Denial of service in n/a

> Remote attackers can cause a system reboot via a crafted URL due to improper QoS implementation in the Windows TCP/IP stack.

- **Severity:** High 7.1 (`AV:N/AC:M/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:** 10 Aug 2011
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-3953-5jrj-v3rr

## What is CVE-2011-1965?

CVE-2011-1965 is a high-severity denial of service vulnerability in Microsoft Windows 7, published on 10 Aug 2011. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Tcpip.sys in the TCP/IP stack in Microsoft Windows 7 Gold and SP1 and Windows Server 2008 R2 and R2 SP1 does not properly implement URL-based QoS, which allows remote attackers to cause a denial of service (reboot) via a crafted URL to a web server, aka "TCP/IP QOS Denial of Service Vulnerability."

Weakness: CWE-399

## Which versions are affected by CVE-2011-1965?

It affects 2 products.


Products: Microsoft Windows 7, Microsoft Windows Server 2008.

## How do I fix CVE-2011-1965?

No fix has been published for CVE-2011-1965 yet. Limit exposure of the affected software until one is available.

## Is CVE-2011-1965 being exploited?

There is no known exploitation of CVE-2011-1965 in the wild and no public exploit code.

Public exploit code:

- Microsoft Windows - TCP/IP Stack Denial of Service (MS11-064) (exploitdb)

## Other vulnerabilities in Microsoft Windows 7

- [CVE-2015-1635](https://insights.sbomify.com/CVE-2015-1635/): Microsoft HTTP.sys Remote Code Execution (critical 9.8, exploited in the wild)
- [CVE-2015-2360](https://insights.sbomify.com/CVE-2015-2360/): Microsoft Win32k Privilege Escalation (high 8.8, exploited in the wild)
- [CVE-2014-6324](https://insights.sbomify.com/CVE-2014-6324/): Microsoft Kerberos Key Distribution Center (KDC) Privilege Escalation (high 8.8, exploited in the wild)
- [CVE-2014-6332](https://insights.sbomify.com/CVE-2014-6332/): Microsoft Windows Object Linking & Embedding (OLE) Automation Array Remote Code Execution (high 8.8, exploited in the wild)
- [CVE-2014-4148](https://insights.sbomify.com/CVE-2014-4148/): Microsoft Windows Remote Code Execution (high 8.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-1965 and fix it if it is affected.

What it is: CVE-2011-1965 is a high-severity denial of service vulnerability in Microsoft Windows 7, published on 10 Aug 2011. 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-2011-1965 in the wild and no public exploit code.

Affected product: Microsoft Windows 7. 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-2011-1965/ (Markdown: https://insights.sbomify.com/CVE-2011-1965/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-1965
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-1965
- OSV: https://osv.dev/vulnerability/CVE-2011-1965

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From sbomify Insights: https://insights.sbomify.com/CVE-2011-1965/
Summaries are generated and may contain mistakes; the official description above is the record.