# CVE-2013-5545: Denial of service in n/a

> Remote attackers can cause a denial of service on Cisco IOS XE ASR devices by sending excessive PPTP packets over NAT.

- **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:** 31 Oct 2013
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-2r8v-24rx-6584

## What is CVE-2013-5545?

CVE-2013-5545 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 31 Oct 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The PPTP ALG implementation in Cisco IOS XE 3.9 before 3.9.2S on 1000 ASR devices allows remote attackers to cause a denial of service (device reload) by sending many PPTP packets over NAT, aka Bug ID CSCuh19936.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2013-5545?

It affects 7 products.


Products: Cisco Asr 1001, Cisco Asr 1002, Cisco Asr 1002-X, Cisco Asr 1004, Cisco Asr 1006, Cisco Asr 1023 Router, Cisco Ios Xe.

## How do I fix CVE-2013-5545?

No fix has been published for CVE-2013-5545 yet. Limit exposure of the affected software until one is available.

## Is CVE-2013-5545 being exploited?

There is no known exploitation of CVE-2013-5545 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Ios Xe

- [CVE-2013-5543](https://insights.sbomify.com/CVE-2013-5543/): Denial of service in n/a (high 7.8)
- [CVE-2013-5546](https://insights.sbomify.com/CVE-2013-5546/): Denial of service in n/a (high 7.8)
- [CVE-2013-5547](https://insights.sbomify.com/CVE-2013-5547/): Denial of service in n/a (high 7.8)
- [CVE-2013-1164](https://insights.sbomify.com/CVE-2013-1164/): Denial of service in n/a (high 7.8)
- [CVE-2013-1165](https://insights.sbomify.com/CVE-2013-1165/): Denial of service in n/a (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2013-5545 and fix it if it is affected.

What it is: CVE-2013-5545 is a high-severity denial of service vulnerability in Cisco Ios Xe, published on 31 Oct 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-2013-5545 in the wild and no public exploit code.

Affected product: Cisco Ios Xe. 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-2013-5545/ (Markdown: https://insights.sbomify.com/CVE-2013-5545/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2013-5545
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2013-5545
- OSV: https://osv.dev/vulnerability/CVE-2013-5545

---
From sbomify Insights: https://insights.sbomify.com/CVE-2013-5545/
Summaries are generated and may contain mistakes; the official description above is the record.