# CVE-2019-10937: Denial of service in SIMATIC TDC CP51M1

> An unauthenticated attacker can cause a Denial-of-Service condition on SIMATIC TDC CP51M1 devices by sending a specially crafted UDP packet.

- **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:** 13 Sep 2019
- **Updated:** 4 Aug 2024
- **Also known as:** GHSA-9jcm-qwpx-cpq2

## What is CVE-2019-10937?

CVE-2019-10937 is a high-severity denial of service vulnerability in Siemens AG SIMATIC TDC CP51M1, published on 13 Sep 2019. 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 SIMATIC TDC CP51M1 (All versions < V1.1.7). An attacker with network access to the device could cause a Denial-of-Service condition by sending a specially crafted UDP packet. The vulnerability affects the UDP communication of the device. The security vulnerability could be exploited without authentication. No user interaction is required to exploit this security vulnerability. Successful exploitation of the security vulnerability compromises availability of the targeted system. At the time of advisory publication no public exploitation of this security vulnerability was known.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2019-10937?

It affects 1 product.


Products: Siemens Simatic Tdc Cp51m1 Firmware.

## How do I fix CVE-2019-10937?

No fix has been published for CVE-2019-10937 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-10937 being exploited?

There is no known exploitation of CVE-2019-10937 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-10937 and fix it if it is affected.

What it is: CVE-2019-10937 is a high-severity denial of service vulnerability in Siemens AG SIMATIC TDC CP51M1, published on 13 Sep 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-2019-10937 in the wild and no public exploit code.

Affected product: Siemens AG SIMATIC TDC CP51M1. 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-2019-10937/ (Markdown: https://insights.sbomify.com/CVE-2019-10937/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-10937
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-10937
- OSV: https://osv.dev/vulnerability/CVE-2019-10937

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-10937/
Summaries are generated and may contain mistakes; the official description above is the record.