# CVE-2019-5909: Auth bypass in License Manager Service of YOKOGAWA products

> Remote attackers can bypass access restrictions to send malicious files to the License Manager Service in Yokogawa industrial control products.

- **Severity:** Critical 9.8 (`CVSS:3.0/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:** 13 Feb 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-2ph5-q865-h92c

## What is CVE-2019-5909?

CVE-2019-5909 is a critical authentication bypass vulnerability in License Manager Service of YOKOGAWA products, published on 13 Feb 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

License Manager Service of YOKOGAWA products (CENTUM VP (R5.01.00 - R6.06.00), CENTUM VP Entry Class (R5.01.00 - R6.06.00), ProSafe-RS (R3.01.00 - R4.04.00), PRM (R4.01.00 - R4.02.00), B/M9000 VP(R7.01.01 - R8.02.03)) allows remote attackers to bypass access restriction to send malicious files to the PC where License Manager Service runs via unspecified vectors.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2019-5909?

It affects 4 products.


Products: Yokogawa B\/M 9000 Vp, Yokogawa Centum Vp, Yokogawa Prm, Yokogawa Prosafe-Rs.

## How do I fix CVE-2019-5909?

No fix has been published for CVE-2019-5909 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-5909 being exploited?

There is no known exploitation of CVE-2019-5909 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-5909 and fix it if it is affected.

What it is: CVE-2019-5909 is a critical authentication bypass vulnerability in License Manager Service of YOKOGAWA products, published on 13 Feb 2019. 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-2019-5909 in the wild and no public exploit code.

Affected product: License Manager Service of YOKOGAWA products. 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-2019-5909/ (Markdown: https://insights.sbomify.com/CVE-2019-5909/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-5909
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-5909
- OSV: https://osv.dev/vulnerability/CVE-2019-5909

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-5909/
Summaries are generated and may contain mistakes; the official description above is the record.