# CVE-2017-6774: Path traversal in StarOS for ASR 5000 Series Aggregated Services Routers

> Authenticated remote attackers can overwrite sensitive configuration files via FTP on Cisco ASR 5000 routers, potentially leading to system compromise.

- **Severity:** Medium 5.0 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 17 Aug 2017
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-q3m2-fp75-5458

## What is CVE-2017-6774?

CVE-2017-6774 is a medium-severity path traversal vulnerability in Cisco Systems, Inc. StarOS for ASR 5000 Series Aggregated Services Routers, published on 17 Aug 2017. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability in Cisco ASR 5000 Series Aggregated Services Routers running the Cisco StarOS operating system could allow an authenticated, remote attacker to overwrite or modify sensitive system files. The vulnerability is due to the inclusion of sensitive system files within specific FTP subdirectories. An attacker could exploit this vulnerability by overwriting sensitive configuration files through FTP. An exploit could allow the attacker to overwrite configuration files on an affected system. Cisco Bug IDs: CSCvd47739. Known Affected Releases: 21.0.v0.65839.

Weakness: CWE-552 (Files or Directories Accessible to External Parties)

## Which versions are affected by CVE-2017-6774?

It affects 1 product.


Products: Cisco Asr 5000 Software.

## How do I fix CVE-2017-6774?

No fix has been published for CVE-2017-6774 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-6774 being exploited?

There is no known exploitation of CVE-2017-6774 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-2017-6773](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-2017-6774 and fix it if it is affected.

What it is: CVE-2017-6774 is a medium-severity path traversal vulnerability in Cisco Systems, Inc. StarOS for ASR 5000 Series Aggregated Services Routers, published on 17 Aug 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-6774 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-2017-6774/ (Markdown: https://insights.sbomify.com/CVE-2017-6774/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-6774
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-6774
- OSV: https://osv.dev/vulnerability/CVE-2017-6774

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-6774/
Summaries are generated and may contain mistakes; the official description above is the record.