# CVE-2021-41291: ECOA BAS controller - Path Traversal-1

> Unauthenticated attackers can disclose directory contents on ECOA BAS controllers via path traversal in the File Manager GET parameter.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 30 Sep 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-9v2m-x295-3g46

## What is CVE-2021-41291?

CVE-2021-41291 is a high-severity path traversal vulnerability in ECOA ECS Router Controller ECS (FLASH), published on 30 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

ECOA BAS controller suffers from a path traversal content disclosure vulnerability. Using the GET parameter in File Manager, unauthenticated attackers can remotely disclose directory content on the affected device.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2021-41291?

It affects 3 products.


Products: Ecoa Ecs Router Controller-Ecs Firmware, Ecoa Riskbuster Firmware, Ecoa Riskterminator.

## How do I fix CVE-2021-41291?

No fix has been published for CVE-2021-41291 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-41291 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-41291 exists.

Public exploit code:

- ECOA Building Automation System - Directory Traversal Content Disclosure (nuclei): http/cves/2021/CVE-2021-41291.yaml

## Other vulnerabilities in ECOA ECS Router Controller ECS (FLASH)

- [CVE-2021-41290](https://insights.sbomify.com/CVE-2021-41290/): ECOA BAS controller - Path Traversal-1 (critical 9.8)
- [CVE-2021-41292](https://insights.sbomify.com/CVE-2021-41292/): ECOA BAS controller - Broken Authentication (critical 9.8)
- [CVE-2021-41296](https://insights.sbomify.com/CVE-2021-41296/): ECOA BAS controller - Weak Password Requirements (critical 9.8)
- [CVE-2021-41299](https://insights.sbomify.com/CVE-2021-41299/): ECOA BAS controller - Use of Hard-coded Credentials (critical 9.8)
- [CVE-2021-41300](https://insights.sbomify.com/CVE-2021-41300/): ECOA BAS controller - Insufficiently Protected Credentials-2 (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-41291 and fix it if it is affected.

What it is: CVE-2021-41291 is a high-severity path traversal vulnerability in ECOA ECS Router Controller ECS (FLASH), published on 30 Sep 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-41291 exists.

Affected product: ECOA ECS Router Controller ECS (FLASH). 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-2021-41291/ (Markdown: https://insights.sbomify.com/CVE-2021-41291/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-41291
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-41291
- OSV: https://osv.dev/vulnerability/CVE-2021-41291

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-41291/
Summaries are generated and may contain mistakes; the official description above is the record.