# CVE-2006-3123: Integer overflow in n/a

> Local users can crash the CFS daemon via integer overflows when handling files larger than 2GB, causing denial of service.

- **Severity:** Low 2.1 (`AV:L/AC:L/Au:N/C:N/I:N/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:** Yes
- **Published:** 7 Aug 2006
- **Updated:** 7 Aug 2024
- **Also known as:** DSA-1138-1, GHSA-2pjx-m5vr-xg6f

## What is CVE-2006-3123?

CVE-2006-3123 is a low-severity vulnerability in n/a, published on 7 Aug 2006. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Multiple integer overflows in the (1) dodecrypt and (2) doencrypt functions in cfs_fh.c in cfsd in Matt Blaze Cryptographic File System (CFS) 1.4.1 before Debian GNU/Linux package 1.4.1-17 allow local users to cause a denial of service (daemon crash) by appending data to a file that is larger than 2 Gb.

## Which versions are affected by CVE-2006-3123?

It affects 1 product.


Products: Matt Blaze Cryptographic File System.

## How do I fix CVE-2006-3123?

Apply the vendor's patch.

## Is CVE-2006-3123 being exploited?

There is no known exploitation of CVE-2006-3123 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-3123 and fix it if it is affected.

What it is: CVE-2006-3123 is a low-severity vulnerability in n/a, published on 7 Aug 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-2006-3123 in the wild and no public exploit code.

Affected product: n/a. 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-2006-3123/ (Markdown: https://insights.sbomify.com/CVE-2006-3123/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-3123
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-3123
- OSV: https://osv.dev/vulnerability/CVE-2006-3123

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-3123/
Summaries are generated and may contain mistakes; the official description above is the record.