# CVE-2006-6397: Integer overflow in n/a

> A disputed integer overflow in BSD banner handling allows local users to modify memory, though it does not cross privilege boundaries.

- **Severity:** Medium 4.4 (`AV:L/AC:M/Au:N/C:P/I:P/A:P`)
- **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:** 8 Dec 2006
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-4326-4xh9-qrjh

## What is CVE-2006-6397?

CVE-2006-6397 is a medium-severity vulnerability in Freebsd Freebsd, published on 8 Dec 2006. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Integer overflow in banner/banner.c in FreeBSD, NetBSD, and OpenBSD might allow local users to modify memory via a long banner.  NOTE: CVE and multiple third parties dispute this issue. Since banner is not setuid, an exploit would not cross privilege boundaries in normal operations. This issue is not a vulnerability

## Which versions are affected by CVE-2006-6397?

It affects 3 products.


Products: Freebsd Freebsd, Netbsd Netbsd, Openbsd Openbsd.

## How do I fix CVE-2006-6397?

No fix has been published for CVE-2006-6397 yet. Limit exposure of the affected software until one is available.

## Is CVE-2006-6397 being exploited?

There is no known exploitation of CVE-2006-6397 in the wild and no public exploit code.

## Other vulnerabilities in Freebsd Freebsd

- [CVE-2018-17160](https://insights.sbomify.com/CVE-2018-17160/): Memory corruption in FreeBSD (critical 10.0)
- [CVE-2014-3954](https://insights.sbomify.com/CVE-2014-3954/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-4304](https://insights.sbomify.com/CVE-2006-4304/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-0226](https://insights.sbomify.com/CVE-2006-0226/): Integer overflow in n/a (critical 10.0)
- [CVE-2004-0002](https://insights.sbomify.com/CVE-2004-0002/): Denial of service in n/a (critical 10.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-6397 and fix it if it is affected.

What it is: CVE-2006-6397 is a medium-severity vulnerability in Freebsd Freebsd, published on 8 Dec 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-2006-6397 in the wild and no public exploit code.

Affected product: Freebsd Freebsd. 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-2006-6397/ (Markdown: https://insights.sbomify.com/CVE-2006-6397/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-6397
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-6397
- OSV: https://osv.dev/vulnerability/CVE-2006-6397

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-6397/
Summaries are generated and may contain mistakes; the official description above is the record.