# CVE-2019-6848: Denial of service in Modicon M580 CPU (BMEx58*) and Modicon M580 communication module (BMENOC0311, BMENOC0321) (see notification for version info)

> Attackers can cause a Denial of Service on Modicon M580 PLCs by sending specific data to the REST API, impacting industrial control operations.

- **Severity:** High 8.6 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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:** 29 Oct 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-gj96-2265-wv5x

## What is CVE-2019-6848?

CVE-2019-6848 is a high-severity denial of service vulnerability in Modicon M580 CPU (BMEx58*) and Modicon M580 communication module (BMENOC0311, BMENOC0321) (see notification for version info), published on 29 Oct 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A CWE-755: Improper Handling of Exceptional Conditions vulnerability exists in Modicon M580 CPU (BMEx58*) and Modicon M580 communication module (BMENOC0311, BMENOC0321) (see notification for version info), which could cause a Denial of Service attack on the PLC when sending specific data on the REST API of the controller/communication module.

Weakness: CWE-755 (Improper Handling of Exceptional Conditions)

## Which versions are affected by CVE-2019-6848?

It affects 3 products.


Products: Schneider-Electric Modicon Bmenoc 0311 Firmware, Schneider-Electric Modicon Bmenoc 0321 Firmware, Schneider-Electric Modicon M580 Firmware.

## How do I fix CVE-2019-6848?

No fix has been published for CVE-2019-6848 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-6848 being exploited?

There is no known exploitation of CVE-2019-6848 in the wild and no public exploit code.

## Other vulnerabilities in Modicon M580 CPU (BMEx58*) and Modicon M580 communication module (BMENOC0311, BMENOC0321) (see notification for version info)

- [CVE-2019-6849](https://insights.sbomify.com/CVE-2019-6849/): Information disclosure in Modicon M580, Modicon BMENOC 0311, Modicon BMENOC 0321 (high 7.5)
- [CVE-2019-6850](https://insights.sbomify.com/CVE-2019-6850/): Information disclosure in Modicon M580, Modicon BMENOC 0311, Modicon BMENOC 0321 (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-6848 and fix it if it is affected.

What it is: CVE-2019-6848 is a high-severity denial of service vulnerability in Modicon M580 CPU (BMEx58*) and Modicon M580 communication module (BMENOC0311, BMENOC0321) (see notification for version info), published on 29 Oct 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-2019-6848 in the wild and no public exploit code.

Affected product: Modicon M580 CPU (BMEx58*) and Modicon M580 communication module (BMENOC0311, BMENOC0321) (see notification for version info). 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-2019-6848/ (Markdown: https://insights.sbomify.com/CVE-2019-6848/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-6848
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-6848
- OSV: https://osv.dev/vulnerability/CVE-2019-6848

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From sbomify Insights: https://insights.sbomify.com/CVE-2019-6848/
Summaries are generated and may contain mistakes; the official description above is the record.