# CVE-2002-1123: Memory corruption in n/a

> Remote attackers can execute arbitrary code on Microsoft SQL Server via a buffer overflow in the authentication function.

- **Severity:** High 7.5 (`AV:N/AC:L/Au:N/C:P/I:P/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 1 Sep 2004
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-wmvx-9r42-6cq7

## What is CVE-2002-1123?

CVE-2002-1123 is a high-severity memory corruption vulnerability in Microsoft Sql Server, published on 1 Sep 2004. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Buffer overflow in the authentication function for Microsoft SQL Server 2000 and Microsoft Desktop Engine (MSDE) 2000 allows remote attackers to execute arbitrary code via a long request to TCP port 1433, aka the "Hello" overflow.

## Which versions are affected by CVE-2002-1123?

It affects 2 products.


Products: Microsoft Data Engine, Microsoft Sql Server.

## How do I fix CVE-2002-1123?

No fix has been published for CVE-2002-1123 yet. Limit exposure of the affected software until one is available.

## Is CVE-2002-1123 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2002-1123 exists.

Public exploit code:

- MS02-056 Microsoft SQL Server Hello Overflow (metasploit)
- Microsoft SQL Server 2000 - User Authentication Remote Buffer Overflow (exploitdb)
- Microsoft SQL Server - Hello Overflow (MS02-056) (Metasploit) (exploitdb)

## Other vulnerabilities in Microsoft Sql Server

- [CVE-2002-1145](https://insights.sbomify.com/CVE-2002-1145/): Privilege escalation in n/a (critical 10.0)
- [CVE-2002-0721](https://insights.sbomify.com/CVE-2002-0721/): Privilege escalation in n/a (critical 10.0)
- [CVE-2008-0086](https://insights.sbomify.com/CVE-2008-0086/): Memory corruption in n/a (critical 9.0)
- [CVE-2008-0106](https://insights.sbomify.com/CVE-2008-0106/): Memory corruption in n/a (critical 9.0)
- [CVE-2008-0107](https://insights.sbomify.com/CVE-2008-0107/): Integer overflow in n/a (critical 9.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2002-1123 and fix it if it is affected.

What it is: CVE-2002-1123 is a high-severity memory corruption vulnerability in Microsoft Sql Server, published on 1 Sep 2004. 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-2002-1123 exists.

Affected product: Microsoft Sql 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-2002-1123/ (Markdown: https://insights.sbomify.com/CVE-2002-1123/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2002-1123
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2002-1123
- OSV: https://osv.dev/vulnerability/CVE-2002-1123

---
From sbomify Insights: https://insights.sbomify.com/CVE-2002-1123/
Summaries are generated and may contain mistakes; the official description above is the record.