# CVE-2015-6301: Denial of service in n/a

> Remote attackers can cause a denial of service on Cisco IOS ASR 9000 devices by sending crafted DHCPv6 packets.

- **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:** 20 Sep 2015
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-mjp9-4wjh-f55v

## What is CVE-2015-6301?

CVE-2015-6301 is a medium-severity denial of service vulnerability in Cisco Ios Xr, published on 20 Sep 2015. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The DHCPv6 server in Cisco IOS on ASR 9000 devices with software 5.2.0 Base allows remote attackers to cause a denial of service (process reset) via crafted packets, aka Bug ID CSCun72171.

Weakness: CWE-399

## Which versions are affected by CVE-2015-6301?

It affects 7 products.


Products: Cisco Asr 9001, Cisco Asr 9006, Cisco Asr 9010, Cisco Asr 9904, Cisco Asr 9912, Cisco Asr 9922, Cisco Ios Xr.

## How do I fix CVE-2015-6301?

No fix has been published for CVE-2015-6301 yet. Limit exposure of the affected software until one is available.

## Is CVE-2015-6301 being exploited?

There is no known exploitation of CVE-2015-6301 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Ios Xr

- [CVE-2014-2176](https://insights.sbomify.com/CVE-2014-2176/): Denial of service in n/a (high 7.1)
- [CVE-2015-0694](https://insights.sbomify.com/CVE-2015-0694/): Security feature bypass in n/a (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2015-6301 and fix it if it is affected.

What it is: CVE-2015-6301 is a medium-severity denial of service vulnerability in Cisco Ios Xr, published on 20 Sep 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-2015-6301 in the wild and no public exploit code.

Affected product: Cisco Ios Xr. 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-2015-6301/ (Markdown: https://insights.sbomify.com/CVE-2015-6301/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2015-6301
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2015-6301
- OSV: https://osv.dev/vulnerability/CVE-2015-6301

---
From sbomify Insights: https://insights.sbomify.com/CVE-2015-6301/
Summaries are generated and may contain mistakes; the official description above is the record.