# CVE-2020-5609: Path traversal in CAMS for HIS

> Remote unauthenticated attackers can exploit a directory traversal flaw in Yokogawa CAMS for HIS to create or overwrite files and execute arbitrary commands.

- **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:** 5 Aug 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-5463-xg53-cjvw

## What is CVE-2020-5609?

CVE-2020-5609 is a critical path traversal vulnerability in Yokogawa Electric Corporation CAMS for HIS, published on 5 Aug 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Directory traversal vulnerability in CAMS for HIS CENTUM CS 3000 (includes CENTUM CS 3000 Small) R3.08.10 to R3.09.50, CENTUM VP (includes CENTUM VP Small, Basic) R4.01.00 to R6.07.00, B/M9000CS R5.04.01 to R5.05.01, and B/M9000 VP R6.01.01 to R8.03.01 allows a remote unauthenticated attacker to create or overwrite arbitrary files and run arbitrary commands via unspecified vectors.

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

## Which versions are affected by CVE-2020-5609?

It affects 4 products.


Products: Yokogawa B\/M9000cs Firmware, Yokogawa B\/M9000vp Firmware, Yokogawa Centum Cs 3000 Firmware, Yokogawa Centum Vp Firmware.

## How do I fix CVE-2020-5609?

No fix has been published for CVE-2020-5609 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-5609 being exploited?

There is no known exploitation of CVE-2020-5609 in the wild and no public exploit code.

## Other vulnerabilities in Yokogawa Electric Corporation CAMS for HIS

- [CVE-2020-5608](https://insights.sbomify.com/CVE-2020-5608/): Auth bypass in CAMS for HIS (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-5609 and fix it if it is affected.

What it is: CVE-2020-5609 is a critical path traversal vulnerability in Yokogawa Electric Corporation CAMS for HIS, published on 5 Aug 2020. 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-2020-5609 in the wild and no public exploit code.

Affected product: Yokogawa Electric Corporation CAMS for HIS. 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-2020-5609/ (Markdown: https://insights.sbomify.com/CVE-2020-5609/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-5609
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-5609
- OSV: https://osv.dev/vulnerability/CVE-2020-5609

---
From sbomify Insights: https://insights.sbomify.com/CVE-2020-5609/
Summaries are generated and may contain mistakes; the official description above is the record.