# CVE-2006-1797: Null dereference in n/a

> Local attackers can crash the NetBSD system by triggering a NULL pointer dereference via a specific ioctl call on a non-existent network alias.

- **Severity:** Medium 4.9 (`AV:L/AC:L/Au:N/C:N/I:N/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:** 18 Apr 2006
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-63wg-c64q-629f

## What is CVE-2006-1797?

CVE-2006-1797 is a medium-severity vulnerability in Netbsd Netbsd, published on 18 Apr 2006. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

The kernel in NetBSD-current before September 28, 2005 allows local users to cause a denial of service (system crash) by using the SIOCGIFALIAS ioctl to gather information on a non-existent alias of a network interface, which causes a NULL pointer dereference.

## Which versions are affected by CVE-2006-1797?

It affects 1 product.


Products: Netbsd Netbsd.

## How do I fix CVE-2006-1797?

No fix has been published for CVE-2006-1797 yet. Limit exposure of the affected software until one is available.

## Is CVE-2006-1797 being exploited?

There is no known exploitation of CVE-2006-1797 in the wild and no public exploit code.

## Other vulnerabilities in Netbsd Netbsd

- [CVE-2017-1000374](https://insights.sbomify.com/CVE-2017-1000374/): Security feature bypass in n/a (critical 9.8)
- [CVE-2017-1000375](https://insights.sbomify.com/CVE-2017-1000375/): Memory corruption in n/a (critical 9.8)
- [CVE-2017-1000378](https://insights.sbomify.com/CVE-2017-1000378/): Denial of service in n/a (critical 9.8)
- [CVE-2015-8212](https://insights.sbomify.com/CVE-2015-8212/): Command injection in n/a (critical 9.8)
- [CVE-2008-3584](https://insights.sbomify.com/CVE-2008-3584/): Denial of service in n/a (critical 9.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-1797 and fix it if it is affected.

What it is: CVE-2006-1797 is a medium-severity vulnerability in Netbsd Netbsd, published on 18 Apr 2006. 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-2006-1797 in the wild and no public exploit code.

Affected product: Netbsd Netbsd. 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-2006-1797/ (Markdown: https://insights.sbomify.com/CVE-2006-1797/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-1797
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-1797
- OSV: https://osv.dev/vulnerability/CVE-2006-1797

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-1797/
Summaries are generated and may contain mistakes; the official description above is the record.