# CVE-2018-7523: Use after free in Omron CX-Supervisor

> Attackers can trigger a double free vulnerability by providing malformed project files, potentially leading to code execution or denial of service.

- **Severity:** Medium 5.3 (`CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 21 Mar 2018
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-9rcj-3rh9-cj4g

## What is CVE-2018-7523?

CVE-2018-7523 is a medium-severity use after free vulnerability in ICS-CERT Omron CX-Supervisor, published on 21 Mar 2018. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

In Omron CX-Supervisor Versions 3.30 and prior, parsing malformed project files may cause a double free vulnerability.

Weakness: CWE-415 (Double Free)

## Which versions are affected by CVE-2018-7523?

It affects 1 product.


Products: Omron Cx-Supervisor.

## How do I fix CVE-2018-7523?

No fix has been published for CVE-2018-7523 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-7523 being exploited?

There is no known exploitation of CVE-2018-7523 in the wild and no public exploit code.

## Other vulnerabilities in ICS-CERT 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-2018-17909](https://insights.sbomify.com/CVE-2018-17909/): Use after free in CX-Supervisor (high 7.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-7523 and fix it if it is affected.

What it is: CVE-2018-7523 is a medium-severity use after free vulnerability in ICS-CERT Omron CX-Supervisor, published on 21 Mar 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-7523 in the wild and no public exploit code.

Affected product: ICS-CERT 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-2018-7523/ (Markdown: https://insights.sbomify.com/CVE-2018-7523/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-7523
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-7523
- OSV: https://osv.dev/vulnerability/CVE-2018-7523

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-7523/
Summaries are generated and may contain mistakes; the official description above is the record.