# CVE-2018-17896: Hardcoded credentials in STARDOM Controllers FCJ,FCN-100,FCN-RTU, FCN-500

> Hard-coded credentials in Yokogawa STARDOM controllers allow attackers to gain unauthorized access to maintenance functions during maintenance work.

- **Severity:** High 8.1 (`CVSS:3.0/AV:N/AC:H/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:** 12 Oct 2018
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-xx3v-pjx9-qmj7

## What is CVE-2018-17896?

CVE-2018-17896 is a high-severity vulnerability in Yokogawa STARDOM Controllers FCJ,FCN-100,FCN-RTU, FCN-500, published on 12 Oct 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Yokogawa STARDOM Controllers FCJ, FCN-100, FCN-RTU, FCN-500, All versions R4.10 and prior, The affected controllers utilize hard-coded credentials which may allow an attacker gain unauthorized access to the maintenance functions and obtain or modify information. This attack can be executed only during maintenance work.

Weakness: CWE-798 (Use of Hard-coded Credentials)

## Which versions are affected by CVE-2018-17896?

It affects 4 products.


Products: Yokogawa Fcj Firmware, Yokogawa Fcn-100 Firmware, Yokogawa Fcn-500 Firmware, Yokogawa Fcn-Rtu Firmware.

## How do I fix CVE-2018-17896?

No fix has been published for CVE-2018-17896 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-17896 being exploited?

There is no known exploitation of CVE-2018-17896 in the wild and no public exploit code.

## Other vulnerabilities in Yokogawa STARDOM Controllers FCJ,FCN-100,FCN-RTU, FCN-500

- [CVE-2018-17900](https://insights.sbomify.com/CVE-2018-17900/): Information disclosure in STARDOM Controllers FCJ,FCN-100,FCN-RTU, FCN-500 (critical 9.8)
- [CVE-2018-10592](https://insights.sbomify.com/CVE-2018-10592/): Hardcoded credentials in STARDOM FCJ Controllers (critical 9.8)
- [CVE-2018-17898](https://insights.sbomify.com/CVE-2018-17898/): Denial of service in STARDOM Controllers FCJ,FCN-100,FCN-RTU, FCN-500 (high 7.5)
- [CVE-2018-17902](https://insights.sbomify.com/CVE-2018-17902/): Denial of service in STARDOM Controllers FCJ,FCN-100,FCN-RTU, FCN-500 (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-17896 and fix it if it is affected.

What it is: CVE-2018-17896 is a high-severity vulnerability in Yokogawa STARDOM Controllers FCJ,FCN-100,FCN-RTU, FCN-500, published on 12 Oct 2018. 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-2018-17896 in the wild and no public exploit code.

Affected product: Yokogawa STARDOM Controllers FCJ,FCN-100,FCN-RTU, FCN-500. 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-2018-17896/ (Markdown: https://insights.sbomify.com/CVE-2018-17896/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-17896
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-17896
- OSV: https://osv.dev/vulnerability/CVE-2018-17896

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-17896/
Summaries are generated and may contain mistakes; the official description above is the record.