# CVE-2024-22044: Denial of service in SENTRON 3KC ATC6 Expansion Module Ethernet

> An attacker on the same Modbus network can cause a denial of service by exploiting an unused HTTP service, forcing the device to reboot.

- **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:** 12 Mar 2024
- **Updated:** 26 Aug 2024
- **Also known as:** GHSA-qh2q-v7cv-8g72

## What is CVE-2024-22044?

CVE-2024-22044 is a high-severity denial of service vulnerability in Siemens SENTRON 3KC ATC6 Expansion Module Ethernet, published on 12 Mar 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability has been identified in SENTRON 3KC ATC6 Expansion Module Ethernet (3KC9000-8TL75) (All versions). Affected devices expose an unused, unstable http service at port 80/tcp on the Modbus-TCP Ethernet. This could allow an attacker on the same Modbus network to create a denial of service condition that forces the device to reboot.

Weakness: CWE-912 (Hidden Functionality)

## Which versions are affected by CVE-2024-22044?


## How do I fix CVE-2024-22044?

No fix has been published for CVE-2024-22044 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-22044 being exploited?

There is no known exploitation of CVE-2024-22044 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-22044 and fix it if it is affected.

What it is: CVE-2024-22044 is a high-severity denial of service vulnerability in Siemens SENTRON 3KC ATC6 Expansion Module Ethernet, published on 12 Mar 2024. 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-2024-22044 in the wild and no public exploit code.

Affected product: Siemens SENTRON 3KC ATC6 Expansion Module Ethernet. 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-2024-22044/ (Markdown: https://insights.sbomify.com/CVE-2024-22044/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-22044
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-22044
- OSV: https://osv.dev/vulnerability/CVE-2024-22044

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-22044/
Summaries are generated and may contain mistakes; the official description above is the record.