# CVE-2021-41290: ECOA BAS controller - Path Traversal-1

> Unauthenticated attackers can exploit path traversal and arbitrary file write in ECOA BAS controllers to execute arbitrary code on the device.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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:** 30 Sep 2021
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-fgx6-cf44-r3h2

## What is CVE-2021-41290?

CVE-2021-41290 is a critical 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 an arbitrary file write and path traversal vulnerability. Using the POST parameters, unauthenticated attackers can remotely set arbitrary values for location and content type and gain the possibility to execute arbitrary code on the affected device.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory), CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2021-41290?

It affects 3 products.


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

## How do I fix CVE-2021-41290?

No fix has been published for CVE-2021-41290 yet. Limit exposure of the affected software until one is available.

## Is CVE-2021-41290 being exploited?

There is no known exploitation of CVE-2021-41290 in the wild and no public exploit code.

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

- [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)
- [CVE-2021-41301](https://insights.sbomify.com/CVE-2021-41301/): ECOA BAS controller - Exposure of Sensitive Information to an Unauthorized Actor (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2021-41290 and fix it if it is affected.

What it is: CVE-2021-41290 is a critical 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: There is no known exploitation of CVE-2021-41290 in the wild and no public exploit code.

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-2021-41290/ (Markdown: https://insights.sbomify.com/CVE-2021-41290/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2021-41290
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2021-41290
- OSV: https://osv.dev/vulnerability/CVE-2021-41290

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From sbomify Insights: https://insights.sbomify.com/CVE-2021-41290/
Summaries are generated and may contain mistakes; the official description above is the record.