# CVE-2022-22724: Denial of service in Modicon M340 CPUs: BMXP34 (All Versions)

> Attackers can cause denial of service on Modicon M340 PLCs by flooding TCP ports with RST or FIN packets, disrupting industrial operations.

- **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:** 4 Feb 2022
- **Updated:** 3 Aug 2024
- **Also known as:** GHSA-qj7j-w6m6-7fgc

## What is CVE-2022-22724?

CVE-2022-22724 is a high-severity denial of service vulnerability in Modicon M340 CPUs: BMXP34 (All Versions), published on 4 Feb 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A CWE-400: Uncontrolled Resource Consumption vulnerability exists that could cause a denial of service on ports 80 (HTTP) and 502 (Modbus), when sending a large number of TCP RST or FIN packets to any open TCP port of the PLC. Affected Product: Modicon M340 CPUs: BMXP34 (All Versions)

Weakness: CWE-400 (Uncontrolled Resource Consumption)

## Which versions are affected by CVE-2022-22724?

It affects 6 products.


Products: Schneider-Electric Modicon M340 Bmxp341000 Firmware, Schneider-Electric Modicon M340 Bmxp342000 Firmware, Schneider-Electric Modicon M340 Bmxp3420102 Firmware, Schneider-Electric Modicon M340 Bmxp342010 Firmware, Schneider-Electric Modicon M340 Bmxp3420302 Firmware, Schneider-Electric Modicon M340 Bmxp342030 Firmware.

## How do I fix CVE-2022-22724?

No fix has been published for CVE-2022-22724 yet. Limit exposure of the affected software until one is available.

## Is CVE-2022-22724 being exploited?

There is no known exploitation of CVE-2022-22724 in the wild and no public exploit code.

## Other vulnerabilities in Modicon M340 CPUs: BMXP34 (All Versions)

- [CVE-2021-22786](https://insights.sbomify.com/CVE-2021-22786/): Information disclosure in Legacy Modicon Quantum (high 7.5)
- [CVE-2020-7537](https://insights.sbomify.com/CVE-2020-7537/): Denial of service in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions) (high 7.5)
- [CVE-2020-7543](https://insights.sbomify.com/CVE-2020-7543/): Denial of service in Modicon M580, Modicon M340, Legacy Controllers Modicon Quantum & Modicon Premium (see security notifications for affected versions) (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2022-22724 and fix it if it is affected.

What it is: CVE-2022-22724 is a high-severity denial of service vulnerability in Modicon M340 CPUs: BMXP34 (All Versions), published on 4 Feb 2022. 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-2022-22724 in the wild and no public exploit code.

Affected product: Modicon M340 CPUs: BMXP34 (All Versions). 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-2022-22724/ (Markdown: https://insights.sbomify.com/CVE-2022-22724/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2022-22724
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2022-22724
- OSV: https://osv.dev/vulnerability/CVE-2022-22724

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From sbomify Insights: https://insights.sbomify.com/CVE-2022-22724/
Summaries are generated and may contain mistakes; the official description above is the record.