# CVE-2020-7484: Denial of service in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0)

> A denial of service vulnerability in TriStation TS1131 requires users to deviate from documented connection and key-switch guidelines.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/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:** 15 Apr 2020
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-4xr5-jcrf-96w3

## What is CVE-2020-7484?

CVE-2020-7484 is a high-severity denial of service vulnerability in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0), published on 15 Apr 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

**VERSION NOT SUPPORTED WHEN ASSIGNED** A vulnerability with the former 'password' feature could allow a denial of service attack if the user is not following documented guidelines pertaining to dedicated TriStation connection and key-switch protection. This vulnerability was discovered and remediated in versions v4.9.1 and v4.10.1 on May 30, 2013. This feature is not present in version v4.9.1 and v4.10.1 through current. Therefore, the vulnerability is not present in these versions.

## Which versions are affected by CVE-2020-7484?

It affects 1 product.


Products: Schneider-Electric Tristation 1131.

## How do I fix CVE-2020-7484?

No fix has been published for CVE-2020-7484 yet. Limit exposure of the affected software until one is available.

## Is CVE-2020-7484 being exploited?

There is no known exploitation of CVE-2020-7484 in the wild and no public exploit code.

## Other vulnerabilities in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0)

- [CVE-2020-7485](https://insights.sbomify.com/CVE-2020-7485/): Auth bypass in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0) (critical 9.8)
- [CVE-2020-7483](https://insights.sbomify.com/CVE-2020-7483/): Information disclosure in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0) (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2020-7484 and fix it if it is affected.

What it is: CVE-2020-7484 is a high-severity denial of service vulnerability in TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0), published on 15 Apr 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-2020-7484 in the wild and no public exploit code.

Affected product: TriStation TS1131 (v4.0.0 to v4.9.0, v4.10.0). 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-2020-7484/ (Markdown: https://insights.sbomify.com/CVE-2020-7484/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2020-7484
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2020-7484
- OSV: https://osv.dev/vulnerability/CVE-2020-7484

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From sbomify Insights: https://insights.sbomify.com/CVE-2020-7484/
Summaries are generated and may contain mistakes; the official description above is the record.