# CVE-2005-3669: Denial of service in n/a

> Remote attackers can cause a denial of service via malformed IKEv1 packets, affecting Cisco network devices.

- **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:** 18 Nov 2005
- **Updated:** 7 Aug 2024
- **Also known as:** GHSA-9rhg-v3xc-rfjw

## What is CVE-2005-3669?

CVE-2005-3669 is a medium-severity denial of service vulnerability in Cisco Adaptive Security Appliance Software, published on 18 Nov 2005. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Multiple unspecified vulnerabilities in the Internet Key Exchange version 1 (IKEv1) implementation in multiple Cisco products allow remote attackers to cause a denial of service (device reset) via certain malformed IKE packets, as demonstrated by the PROTOS ISAKMP Test Suite for IKEv1.  NOTE: due to the lack of details in the Cisco advisory, it is unclear which of CVE-2005-3666, CVE-2005-3667, and/or CVE-2005-3668 this issue applies to.

## Which versions are affected by CVE-2005-3669?

It affects 8 products.


Products: Cisco Adaptive Security Appliance Software, Cisco Firewall Services Module, Cisco Ios, Cisco Mds 9000, Cisco Mds 9000 San-Os, Cisco Pix Firewall, Cisco Pix Firewall Software, Cisco Vpn 3000 Concentrator Series Software.

## How do I fix CVE-2005-3669?

No fix has been published for CVE-2005-3669 yet. Limit exposure of the affected software until one is available.

## Is CVE-2005-3669 being exploited?

There is no known exploitation of CVE-2005-3669 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Adaptive Security Appliance Software

- [CVE-2025-20333](https://insights.sbomify.com/CVE-2025-20333/): Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Buffer Overflow (critical 9.9, exploited in the wild)
- [CVE-2016-6366](https://insights.sbomify.com/CVE-2016-6366/): Cisco Adaptive Security Appliance (ASA) SNMP Buffer Overflow (high 8.8, exploited in the wild)
- [CVE-2026-20349](https://insights.sbomify.com/CVE-2026-20349/): Cisco Secure Firewall Adaptive Security Appliance (ASA) and Secure Firewall Threat Defense (FTD) Heap Inspection (high 8.6, exploited in the wild)
- [CVE-2024-20353](https://insights.sbomify.com/CVE-2024-20353/): Cisco ASA and FTD Denial of Service (high 8.6, exploited in the wild)
- [CVE-2016-6367](https://insights.sbomify.com/CVE-2016-6367/): Cisco Adaptive Security Appliance (ASA) CLI Remote Code Execution (high 7.8, exploited in the wild)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2005-3669 and fix it if it is affected.

What it is: CVE-2005-3669 is a medium-severity denial of service vulnerability in Cisco Adaptive Security Appliance Software, published on 18 Nov 2005. 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-2005-3669 in the wild and no public exploit code.

Affected product: Cisco Adaptive Security Appliance Software. 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-2005-3669/ (Markdown: https://insights.sbomify.com/CVE-2005-3669/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2005-3669
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2005-3669
- OSV: https://osv.dev/vulnerability/CVE-2005-3669

---
From sbomify Insights: https://insights.sbomify.com/CVE-2005-3669/
Summaries are generated and may contain mistakes; the official description above is the record.