# CVE-2017-6729: Denial of service in Cisco StarOS

> Unauthenticated remote attackers can cause a denial of service by triggering a BGP process reload on Cisco StarOS systems with BGP enabled.

- **Severity:** High 7.5 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 10 Jul 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-65jx-wrpg-m8qj

## What is CVE-2017-6729?

CVE-2017-6729 is a high-severity denial of service vulnerability in Cisco StarOS, published on 10 Jul 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability in the Border Gateway Protocol (BGP) processing functionality of the Cisco StarOS operating system for Cisco ASR 5000 Series Routers and Cisco Virtualized Packet Core (VPC) Software could allow an unauthenticated, remote attacker to cause the BGP process on an affected system to reload, resulting in a denial of service (DoS) condition. This vulnerability affects the following products if they are running the Cisco StarOS operating system and BGP is enabled for the system: Cisco ASR 5000 Series Routers and Cisco Virtualized Packet Core Software. More Information: CSCvc44968. Known Affected Releases: 16.4.1 19.1.0 21.1.0 21.1.M0.65824. Known Fixed Releases: 21.3.A0.65902 21.2.A0.65905 21.1.b0.66164 21.1.V0.66014 21.1.R0.65898 21.1.M0.65894 21.1.0.66030 21.1.0.

## Which versions are affected by CVE-2017-6729?

It affects 1 product.


Products: Cisco Asr 5000 Software.

## How do I fix CVE-2017-6729?

No fix has been published for CVE-2017-6729 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-6729 being exploited?

There is no known exploitation of CVE-2017-6729 in the wild and no public exploit code.

## Other vulnerabilities in Cisco StarOS

- [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)
- [CVE-2017-6774](https://insights.sbomify.com/CVE-2017-6774/): Path traversal in StarOS for ASR 5000 Series Aggregated Services Routers (medium 5.0)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-6729 and fix it if it is affected.

What it is: CVE-2017-6729 is a high-severity denial of service vulnerability in Cisco StarOS, published on 10 Jul 2017. 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-2017-6729 in the wild and no public exploit code.

Affected product: Cisco StarOS. 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-2017-6729/ (Markdown: https://insights.sbomify.com/CVE-2017-6729/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-6729
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-6729
- OSV: https://osv.dev/vulnerability/CVE-2017-6729

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-6729/
Summaries are generated and may contain mistakes; the official description above is the record.