# CVE-2006-4257: Null dereference in n/a

> Remote authenticated users can crash IBM DB2 by sending malformed connection or SQLJRA packets, causing a denial of service.

- **Severity:** Medium 4.0 (`AV:N/AC:L/Au:S/C:N/I:N/A:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Aug 2006
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-hcpr-x372-mrhj

## What is CVE-2006-4257?

CVE-2006-4257 is a medium-severity vulnerability in Ibm Db2, published on 21 Aug 2006. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

IBM DB2 Universal Database (UDB) before 8.1 FixPak 13 allows remote authenticated users to cause a denial of service (crash) by (1) sending the first ACCSEC command without an RDBNAM parameter during the CONNECT process, or (2) sending crafted SQLJRA packet, which results in a null dereference.

Weakness: CWE-399

## Which versions are affected by CVE-2006-4257?

It affects 1 product.


Products: Ibm Db2.

## How do I fix CVE-2006-4257?

No fix has been published for CVE-2006-4257 yet. Limit exposure of the affected software until one is available.

## Is CVE-2006-4257 being exploited?

There is no known exploitation of CVE-2006-4257 in the wild and no public exploit code.

## Other vulnerabilities in Ibm Db2

- [CVE-2012-1797](https://insights.sbomify.com/CVE-2012-1797/): IBM DB2 9.5 uses world-writable permissions for nodes.reg, which has unspecified impact and attack vectors. (critical 10.0)
- [CVE-2010-3731](https://insights.sbomify.com/CVE-2010-3731/): Memory corruption in n/a (critical 10.0)
- [CVE-2010-3193](https://insights.sbomify.com/CVE-2010-3193/): Other in n/a (critical 10.0)
- [CVE-2009-4335](https://insights.sbomify.com/CVE-2009-4335/): Other in n/a (critical 10.0)
- [CVE-2009-3473](https://insights.sbomify.com/CVE-2009-3473/): Missing authorization in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-4257 and fix it if it is affected.

What it is: CVE-2006-4257 is a medium-severity vulnerability in Ibm Db2, published on 21 Aug 2006. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2006-4257 in the wild and no public exploit code.

Affected product: Ibm Db2. 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-2006-4257/ (Markdown: https://insights.sbomify.com/CVE-2006-4257/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-4257
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-4257
- OSV: https://osv.dev/vulnerability/CVE-2006-4257

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-4257/
Summaries are generated and may contain mistakes; the official description above is the record.