# CVE-2017-6773: Command injection in StarOS for ASR 5000 Series Aggregated Services Routers

> An authenticated local attacker can bypass CLI restrictions to execute arbitrary commands on the underlying operating system of Cisco ASR 5000 routers.

- **Severity:** Medium 6.7 (`CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Aug 2017
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-ppp2-xhm6-jw52

## What is CVE-2017-6773?

CVE-2017-6773 is a medium-severity command injection vulnerability in Cisco Systems, Inc. StarOS for ASR 5000 Series Aggregated Services Routers, published on 17 Aug 2017. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability in the CLI of Cisco ASR 5000 Series Aggregated Services Routers running the Cisco StarOS operating system could allow an authenticated, local attacker to bypass the CLI restrictions and execute commands on the underlying operating system. The vulnerability is due to insufficient input sanitization of user-supplied input at the CLI. An attacker could exploit this vulnerability by crafting a script on the device that will allow them to bypass built-in restrictions. An exploit could allow the unauthorized user to launch the CLI directly from a command shell. Cisco Bug IDs: CSCvd47722. Known Affected Releases: 21.0.v0.65839.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2017-6773?

It affects 1 product.


Products: Cisco Asr 5000 Software.

## How do I fix CVE-2017-6773?

No fix has been published for CVE-2017-6773 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-6773 being exploited?

There is no known exploitation of CVE-2017-6773 in the wild and no public exploit code.

## Other vulnerabilities in Cisco Systems, Inc. StarOS for ASR 5000 Series Aggregated Services Routers

- [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-2017-6775](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-2017-6773 and fix it if it is affected.

What it is: CVE-2017-6773 is a medium-severity command injection vulnerability in Cisco Systems, Inc. StarOS for ASR 5000 Series Aggregated Services Routers, published on 17 Aug 2017. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-6773 in the wild and no public exploit code.

Affected product: Cisco Systems, Inc. StarOS for ASR 5000 Series Aggregated Services Routers. 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-2017-6773/ (Markdown: https://insights.sbomify.com/CVE-2017-6773/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-6773
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-6773
- OSV: https://osv.dev/vulnerability/CVE-2017-6773

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-6773/
Summaries are generated and may contain mistakes; the official description above is the record.