# CVE-2015-6334: Denial of service in n/a

> Remote attackers can cause a denial of service on Cisco ASR devices by sending a crafted TACACS packet, requiring vendor patches.

- **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:** 16 Oct 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-5vfg-439g-2w4r

## What is CVE-2015-6334?

CVE-2015-6334 is a medium-severity denial of service vulnerability in n/a, published on 16 Oct 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Cisco ASR 5000 and 5500 devices with software 18.0.0.57828 and 19.0.M0.61045 allow remote attackers to cause a denial of service (vpnmgr process restart) via a crafted header in a TACACS packet, aka Bug ID CSCuw01984.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2015-6334?

It affects 1 product.


Products: Cisco Asr 5000 Software.

## How do I fix CVE-2015-6334?

No fix has been published for CVE-2015-6334 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-6334 being exploited?

There is no known exploitation of CVE-2015-6334 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2017-6729](https://insights.sbomify.com/CVE-2017-6729/): Denial of service in Cisco StarOS (high 7.5)
- [CVE-2016-6455](https://insights.sbomify.com/CVE-2016-6455/): Denial of service in Cisco StarOS 18.x through 21.x (high 7.5)
- [CVE-2016-1436](https://insights.sbomify.com/CVE-2016-1436/): Denial of service in n/a (high 7.5)
- [CVE-2017-6773](https://insights.sbomify.com/CVE-2017-6773/): Command injection in StarOS for ASR 5000 Series Aggregated Services Routers (medium 6.7)
- [CVE-2017-6775](https://insights.sbomify.com/CVE-2017-6775/): Privilege escalation in StarOS for ASR 5000 Series Aggregated Services Routers (medium 5.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-6334 and fix it if it is affected.

What it is: CVE-2015-6334 is a medium-severity denial of service vulnerability in n/a, published on 16 Oct 2015. 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-2015-6334 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-2015-6334/ (Markdown: https://insights.sbomify.com/CVE-2015-6334/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-6334
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-6334
- OSV: https://osv.dev/vulnerability/CVE-2015-6334

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-6334/
Summaries are generated and may contain mistakes; the official description above is the record.