# CVE-2018-17909: Use after free in CX-Supervisor

> An attacker can execute arbitrary code by exploiting a use-after-free vulnerability in Omron CX-Supervisor when processing malicious project files.

- **Severity:** High 7.8 (`CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 5 Nov 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-5j3q-fm57-p88f

## What is CVE-2018-17909?

CVE-2018-17909 is a high-severity use after free vulnerability in Omron CX-Supervisor, published on 5 Nov 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

When processing project files in Omron CX-Supervisor Versions 3.4.1.0 and prior, the application fails to check if it is referencing freed memory, which may allow an attacker to execute code under the context of the application.

Weakness: CWE-416 (Use After Free)

## Which versions are affected by CVE-2018-17909?

It affects 1 product.


Products: Omron Cx-Supervisor.

## How do I fix CVE-2018-17909?

No fix has been published for CVE-2018-17909 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-17909 being exploited?

There is no known exploitation of CVE-2018-17909 in the wild and no public exploit code.

## Other vulnerabilities in Omron CX-Supervisor

- [CVE-2019-18251](https://insights.sbomify.com/CVE-2019-18251/): Other in Omron CX-Supervisor (high 8.8)
- [CVE-2018-19011](https://insights.sbomify.com/CVE-2018-19011/): Code injection in CX-Supervisor (high 8.8)
- [CVE-2018-19017](https://insights.sbomify.com/CVE-2018-19017/): Use after free in CX-Supervisor (high 8.8)
- [CVE-2018-17905](https://insights.sbomify.com/CVE-2018-17905/): Memory corruption in CX-Supervisor (high 7.8)
- [CVE-2018-17913](https://insights.sbomify.com/CVE-2018-17913/): Memory corruption in CX-Supervisor (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-17909 and fix it if it is affected.

What it is: CVE-2018-17909 is a high-severity use after free vulnerability in Omron CX-Supervisor, published on 5 Nov 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2018-17909 in the wild and no public exploit code.

Affected product: Omron CX-Supervisor. 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-2018-17909/ (Markdown: https://insights.sbomify.com/CVE-2018-17909/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-17909
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-17909
- OSV: https://osv.dev/vulnerability/CVE-2018-17909

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-17909/
Summaries are generated and may contain mistakes; the official description above is the record.