# CVE-2001-0861: Denial of service in n/a

> Remote attackers can cause denial of service on Cisco 12000 routers by flooding them with traffic that generates excessive ICMP Unreachable replies.

- **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:** 9 Mar 2002
- **Updated:** 8 Aug 2024
- **Also known as:** GHSA-x7vm-cx3f-5pwf

## What is CVE-2001-0861?

CVE-2001-0861 is a medium-severity denial of service vulnerability in n/a, published on 9 Mar 2002. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Cisco 12000 with IOS 12.0 and line cards based on Engine 2 and earlier allows remote attackers to cause a denial of service (CPU consumption) by flooding the router with traffic that generates a large number of ICMP Unreachable replies.

## Which versions are affected by CVE-2001-0861?

It affects 1 product.


Products: Cisco 12000 Router.

## How do I fix CVE-2001-0861?

No fix has been published for CVE-2001-0861 yet. Limit exposure of the affected software until one is available.

## Is CVE-2001-0861 being exploited?

There is no known exploitation of CVE-2001-0861 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2001-0862](https://insights.sbomify.com/CVE-2001-0862/): Security feature bypass in n/a (high 7.5)
- [CVE-2001-0864](https://insights.sbomify.com/CVE-2001-0864/): Security feature bypass in n/a (high 7.5)
- [CVE-2001-0865](https://insights.sbomify.com/CVE-2001-0865/): Security feature bypass in n/a (high 7.5)
- [CVE-2001-0866](https://insights.sbomify.com/CVE-2001-0866/): Auth bypass in n/a (high 7.5)
- [CVE-2001-0867](https://insights.sbomify.com/CVE-2001-0867/): Security feature bypass in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2001-0861 and fix it if it is affected.

What it is: CVE-2001-0861 is a medium-severity denial of service vulnerability in n/a, published on 9 Mar 2002. 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-2001-0861 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-2001-0861/ (Markdown: https://insights.sbomify.com/CVE-2001-0861/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2001-0861
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2001-0861
- OSV: https://osv.dev/vulnerability/CVE-2001-0861

---
From sbomify Insights: https://insights.sbomify.com/CVE-2001-0861/
Summaries are generated and may contain mistakes; the official description above is the record.