# CVE-2013-1235: Denial of service in n/a

> Remote attackers can cause a denial of service on Cisco Wireless LAN Controllers by exhausting resources through improperly terminated TELNET sessions.

- **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:** 4 May 2013
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-ffwh-46r8-rg8g

## What is CVE-2013-1235?

CVE-2013-1235 is a medium-severity denial of service vulnerability in n/a, published on 4 May 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Cisco Wireless LAN Controller (WLC) devices do not properly address the resource consumption of terminated TELNET sessions, which allows remote attackers to cause a denial of service (TELNET outage) by making many TELNET connections and improperly ending these connections, aka Bug ID CSCug35507.

## Which versions are affected by CVE-2013-1235?

It affects 16 products.


Products: Cisco 2000 Wireless Lan Controller, Cisco 2100 Wireless Lan Controller, Cisco 2106 Wireless Lan Controller, Cisco 2112 Wireless Lan Controller, Cisco 2125 Wireless Lan Controller, Cisco 2500 Wireless Lan Controller, Cisco 2504 Wireless Lan Controller, Cisco 4100 Wireless Lan Controller, Cisco 4400 Wireless Lan Controller, Cisco 4402 Wireless Lan Controller, Cisco 4404 Wireless Lan Controller, Cisco 5500 Wireless Lan Controller, Cisco 7500 Wireless Lan Controller, Cisco 8500 Wireless Lan Controller, Cisco Airespace 4000 Wireless Lan Controller, Cisco Wireless Lan Controller.

## How do I fix CVE-2013-1235?

No fix has been published for CVE-2013-1235 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-1235 being exploited?

There is no known exploitation of CVE-2013-1235 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2012-0371](https://insights.sbomify.com/CVE-2012-0371/): Missing authorization in n/a (critical 9.3)
- [CVE-2013-1104](https://insights.sbomify.com/CVE-2013-1104/): Code injection in n/a (critical 9.0)
- [CVE-2013-1105](https://insights.sbomify.com/CVE-2013-1105/): Missing authorization in n/a (critical 9.0)
- [CVE-2013-1102](https://insights.sbomify.com/CVE-2013-1102/): Denial of service in n/a (high 7.8)
- [CVE-2013-1103](https://insights.sbomify.com/CVE-2013-1103/): Denial of service in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-1235 and fix it if it is affected.

What it is: CVE-2013-1235 is a medium-severity denial of service vulnerability in n/a, published on 4 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-2013-1235 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-2013-1235/ (Markdown: https://insights.sbomify.com/CVE-2013-1235/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-1235
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-1235
- OSV: https://osv.dev/vulnerability/CVE-2013-1235

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-1235/
Summaries are generated and may contain mistakes; the official description above is the record.