# CVE-2011-0043: Weak cryptography in n/a

> Local attackers can escalate privileges by exploiting weak Kerberos hashing algorithms in Windows XP and Server 2003.

- **Severity:** High 7.2 (`AV:L/AC:L/Au:N/C:C/I:C/A:C`)
- **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:** 10 Feb 2011
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-34f8-rw4c-vq9g

## What is CVE-2011-0043?

CVE-2011-0043 is a high-severity vulnerability in Microsoft Windows 2003 Server, published on 10 Feb 2011. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Kerberos in Microsoft Windows XP SP2 and SP3 and Server 2003 SP2 supports weak hashing algorithms, which allows local users to gain privileges by operating a service that sends crafted service tickets, as demonstrated by the CRC32 algorithm, aka "Kerberos Unkeyed Checksum Vulnerability."

Weakness: CWE-310

## Which versions are affected by CVE-2011-0043?

It affects 3 products.


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

## How do I fix CVE-2011-0043?

No fix has been published for CVE-2011-0043 yet. Limit exposure of the affected software until one is available.

## Is CVE-2011-0043 being exploited?

There is no known exploitation of CVE-2011-0043 in the wild and no public exploit code.

## Other vulnerabilities in Microsoft Windows 2003 Server

- [CVE-2008-0015](https://insights.sbomify.com/CVE-2008-0015/): Microsoft Windows Video ActiveX Control Remote Code Execution (high 8.8, exploited in the wild)
- [CVE-2015-1701](https://insights.sbomify.com/CVE-2015-1701/): Microsoft Win32k Privilege Escalation (high 7.8, exploited in the wild)
- [CVE-2013-5065](https://insights.sbomify.com/CVE-2013-5065/): Microsoft Windows Kernel Privilege Escalation (high 7.8, exploited in the wild)
- [CVE-2011-1268](https://insights.sbomify.com/CVE-2011-1268/): Code injection in n/a (critical 10.0)
- [CVE-2011-1868](https://insights.sbomify.com/CVE-2011-1868/): Memory corruption in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2011-0043 and fix it if it is affected.

What it is: CVE-2011-0043 is a high-severity vulnerability in Microsoft Windows 2003 Server, published on 10 Feb 2011. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2011-0043 in the wild and no public exploit code.

Affected product: Microsoft Windows 2003 Server. 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-2011-0043/ (Markdown: https://insights.sbomify.com/CVE-2011-0043/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2011-0043
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2011-0043
- OSV: https://osv.dev/vulnerability/CVE-2011-0043

---
From sbomify Insights: https://insights.sbomify.com/CVE-2011-0043/
Summaries are generated and may contain mistakes; the official description above is the record.