# CVE-2018-7803: Denial of service in Triconex TriStation Emulator V1.2.0

> A specially crafted packet can crash the Triconex TriStation Emulator when running in off-line mode, affecting only the testing tool and not plant safety.

- **Severity:** Medium 5.9 (`CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/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:** 22 May 2019
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-gxxv-qg6g-737q

## What is CVE-2018-7803?

CVE-2018-7803 is a medium-severity denial of service vulnerability in Triconex TriStation Emulator V1.2.0, published on 22 May 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A CWE-754 Improper Check for Unusual or Exceptional Conditions vulnerability exists in Triconex TriStation Emulator V1.2.0, which could cause the emulator to crash when sending a specially crafted packet. The emulator is used infrequently for application logic testing. It is susceptible to an attack only while running in off-line mode. This vulnerability does not exist in Triconex hardware products and therefore has no effect on the operating safety functions in a plant.

Weakness: CWE-754 (Improper Check for Unusual or Exceptional Conditions)

## Which versions are affected by CVE-2018-7803?

It affects 1 product.


Products: Schneider-Electric Triconex Tristation Emulator.

## How do I fix CVE-2018-7803?

No fix has been published for CVE-2018-7803 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-7803 being exploited?

There is no known exploitation of CVE-2018-7803 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-7803 and fix it if it is affected.

What it is: CVE-2018-7803 is a medium-severity denial of service vulnerability in Triconex TriStation Emulator V1.2.0, published on 22 May 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-2018-7803 in the wild and no public exploit code.

Affected product: Triconex TriStation Emulator V1.2.0. 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-2018-7803/ (Markdown: https://insights.sbomify.com/CVE-2018-7803/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-7803
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-7803
- OSV: https://osv.dev/vulnerability/CVE-2018-7803

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-7803/
Summaries are generated and may contain mistakes; the official description above is the record.