# CVE-2009-0627: Denial of service in n/a

> Remote attackers can crash Cisco Nexus 5000 switches by sending a specific sequence of TCP packets, causing a denial of service.

- **Severity:** High 7.8 (`AV:N/AC:L/Au:N/C:N/I:N/A:C`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 8 Sep 2009
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-jwpp-857g-6hpg

## What is CVE-2009-0627?

CVE-2009-0627 is a high-severity denial of service vulnerability in Cisco Nx-Os, published on 8 Sep 2009. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Unspecified vulnerability in Cisco NX-OS before 4.0(1a)N2(1), when running on Nexus 5000 platforms, allows remote attackers to cause a denial of service (crash) via an unspecified "sequence of TCP packets" related to "TCP State manipulation," possibly related to separate attacks against CVE-2008-4609.

## Which versions are affected by CVE-2009-0627?

It affects 3 products.


Products: Cisco Nexus 5000, Cisco Nexus 7000, Cisco Nx-Os.

## How do I fix CVE-2009-0627?

No fix has been published for CVE-2009-0627 yet. Limit exposure of the affected software until one is available.

## Is CVE-2009-0627 being exploited?

There is no known exploitation of CVE-2009-0627 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Nx-Os

- [CVE-2014-3341](https://insights.sbomify.com/CVE-2014-3341/): Information disclosure in n/a (medium 5.0)
- [CVE-2012-1357](https://insights.sbomify.com/CVE-2012-1357/): Denial of service in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2009-0627 and fix it if it is affected.

What it is: CVE-2009-0627 is a high-severity denial of service vulnerability in Cisco Nx-Os, published on 8 Sep 2009. 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-2009-0627 in the wild and no public exploit code.

Affected product: Cisco Nx-Os. 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-2009-0627/ (Markdown: https://insights.sbomify.com/CVE-2009-0627/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2009-0627
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2009-0627
- OSV: https://osv.dev/vulnerability/CVE-2009-0627

---
From sbomify Insights: https://insights.sbomify.com/CVE-2009-0627/
Summaries are generated and may contain mistakes; the official description above is the record.