# CVE-2006-1646: Denial of service in n/a

> Remote attackers can crash the racoon IKE daemon via crafted packets when aggressive mode is enabled, causing denial of service.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:N/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:** 6 Apr 2006
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-rjhx-jgh9-pm4q

## What is CVE-2006-1646?

CVE-2006-1646 is a medium-severity denial of service vulnerability in n/a, published on 6 Apr 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Internet Key Exchange version 1 (IKEv1) implementation (isakmp_agg.c) in the Shoichi Sakane KAME Project racoon, as used by NetBSD 1.6, 2.x before 20060119, certain FreeBSD releases, and possibly other distributions of BSD or Linux operating systems, when running in aggressive mode, allows remote attackers to cause a denial of service (daemon crash) via crafted IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.

## Which versions are affected by CVE-2006-1646?

It affects 1 product.


Products: Internet Key Exchange Internet Key Exchange.

## How do I fix CVE-2006-1646?

No fix has been published for CVE-2006-1646 yet. Limit exposure of the affected software until one is available.

## Is CVE-2006-1646 being exploited?

There is no known exploitation of CVE-2006-1646 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2005-3666](https://insights.sbomify.com/CVE-2005-3666/): Memory corruption in n/a (critical 10.0)
- [CVE-2006-2298](https://insights.sbomify.com/CVE-2006-2298/): Denial of service in n/a (medium 5.0)
- [CVE-2005-3667](https://insights.sbomify.com/CVE-2005-3667/): Denial of service in n/a (medium 5.0)
- [CVE-2005-3668](https://insights.sbomify.com/CVE-2005-3668/): Memory corruption in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2006-1646 and fix it if it is affected.

What it is: CVE-2006-1646 is a medium-severity denial of service vulnerability in n/a, published on 6 Apr 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2006-1646 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-2006-1646/ (Markdown: https://insights.sbomify.com/CVE-2006-1646/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2006-1646
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2006-1646
- OSV: https://osv.dev/vulnerability/CVE-2006-1646

---
From sbomify Insights: https://insights.sbomify.com/CVE-2006-1646/
Summaries are generated and may contain mistakes; the official description above is the record.