# CVE-2013-1209: Auth bypass in n/a

> Remote attackers can disable packet encryption and integrity protection in Cisco Nexus 1000V by sending crafted packets due to improper authentication.

- **Severity:** Medium 5.0 (`AV:N/AC:L/Au:N/C:N/I:P/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 29 May 2013
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-m4mh-hhpp-pm37

## What is CVE-2013-1209?

CVE-2013-1209 is a medium-severity authentication bypass vulnerability in Cisco Nx-Os, published on 29 May 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The encryption functionality in the Virtual Supervisor Module (VSM) to Virtual Ethernet Module (VEM) communication component in Cisco NX-OS on the Nexus 1000V does not properly authenticate VSM/VEM packets, which allows remote attackers to disable packet-level encryption and integrity protection via crafted packets, aka Bug ID CSCud14710.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2013-1209?

It affects 1 product.


Products: Cisco Nx-Os.

## How do I fix CVE-2013-1209?

No fix has been published for CVE-2013-1209 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-1209 being exploited?

There is no known exploitation of CVE-2013-1209 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Nx-Os

- [CVE-2024-20399](https://insights.sbomify.com/CVE-2024-20399/): Cisco NX-OS Command Injection (medium 6.0, exploited in the wild)
- [CVE-2021-1361](https://insights.sbomify.com/CVE-2021-1361/): Cisco NX-OS Software Unauthenticated Arbitrary File Actions Vulnerability (critical 9.8)
- [CVE-2018-0301](https://insights.sbomify.com/CVE-2018-0301/): Memory corruption in Cisco NX-OS unknown (critical 9.8)
- [CVE-2016-1453](https://insights.sbomify.com/CVE-2016-1453/): Memory corruption in n/a (critical 9.8)
- [CVE-2016-1341](https://insights.sbomify.com/CVE-2016-1341/): Hardcoded credentials in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-1209 and fix it if it is affected.

What it is: CVE-2013-1209 is a medium-severity authentication bypass vulnerability in Cisco Nx-Os, published on 29 May 2013. 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-2013-1209 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-2013-1209/ (Markdown: https://insights.sbomify.com/CVE-2013-1209/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-1209
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-1209
- OSV: https://osv.dev/vulnerability/CVE-2013-1209

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-1209/
Summaries are generated and may contain mistakes; the official description above is the record.