# CVE-2019-12254: TECSON/GOK: Improper Authentication and Access Control on multiple devices

> Unauthenticated attackers can modify application settings on Tecson and GOK SmartBox devices by accessing a specific URL, bypassing intended access controls.

- **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:** 6 May 2022
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-rhv8-wfm8-gjqj

## What is CVE-2019-12254?

CVE-2019-12254 is a critical missing authorization vulnerability in GOK LX-Net, published on 6 May 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

In multiple Tecson Tankspion and GOKs SmartBox 4 products the affected application doesn't properly restrict access to an endpoint that is responsible for saving settings, to a unauthenticated user with limited access rights. Based on the lack of adequately implemented access-control rules, by accessing a specific uniform resource locator (URL) on the web server, a malicious user is able to change the application settings without authenticating at all, which violates originally laid ACL rules.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2019-12254?

It affects 5 products.


Products: Gok Smartbox 4 Lan Firmware, Gok Smartbox 4 Lan Pro Firmware, Tecson E-Litro Net Firmware, Tecson Lx-Net Firmware, Tecson Lx-Q-Net Firmware.

## How do I fix CVE-2019-12254?

No fix has been published for CVE-2019-12254 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-12254 being exploited?

There is no known exploitation of CVE-2019-12254 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-12254 and fix it if it is affected.

What it is: CVE-2019-12254 is a critical missing authorization vulnerability in GOK LX-Net, published on 6 May 2022. 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-2019-12254 in the wild and no public exploit code.

Affected product: GOK LX-Net. 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-2019-12254/ (Markdown: https://insights.sbomify.com/CVE-2019-12254/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-12254
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-12254
- OSV: https://osv.dev/vulnerability/CVE-2019-12254

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-12254/
Summaries are generated and may contain mistakes; the official description above is the record.