# CVE-2018-13815: Denial of service in SIMATIC S7-1200, SIMATIC S7-1500

> An attacker can cause a Denial-of-Service condition on Siemens SIMATIC S7-1200 and S7-1500 devices by exhausting the connection pool via port 102/tcp.

- **Severity:** High 7.5 (`CVSS:3.0/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 Dec 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-jwv4-wwvg-5p94

## What is CVE-2018-13815?

CVE-2018-13815 is a high-severity denial of service vulnerability in Siemens AG SIMATIC S7-1200, SIMATIC S7-1500, published on 13 Dec 2018. 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 S7-1200 (All versions), SIMATIC S7-1500 (All Versions < V2.6). An attacker could exhaust the available connection pool of an affected device by opening a sufficient number of connections to the device. Successful exploitation requires an attacker to be able to send packets to port 102/tcp of the affected device. No user interaction and no user privileges are required to exploit the vulnerability. The vulnerability, if exploited, could cause a Denial-of-Service condition impacting the availability of the system. At the time of advisory publication no public exploitation of this vulnerability was known.

Weakness: CWE-400 (Uncontrolled Resource Consumption), CWE-410 (Insufficient Resource Pool)

## Which versions are affected by CVE-2018-13815?

It affects 2 products.


Products: Siemens Simatic S7-1200 Firmware, Siemens Simatic S7-1500 Firmware.

## How do I fix CVE-2018-13815?

No fix has been published for CVE-2018-13815 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-13815 being exploited?

There is no known exploitation of CVE-2018-13815 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-13815 and fix it if it is affected.

What it is: CVE-2018-13815 is a high-severity denial of service vulnerability in Siemens AG SIMATIC S7-1200, SIMATIC S7-1500, published on 13 Dec 2018. 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-2018-13815 in the wild and no public exploit code.

Affected product: Siemens AG SIMATIC S7-1200, SIMATIC S7-1500. 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-2018-13815/ (Markdown: https://insights.sbomify.com/CVE-2018-13815/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-13815
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-13815
- OSV: https://osv.dev/vulnerability/CVE-2018-13815

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From sbomify Insights: https://insights.sbomify.com/CVE-2018-13815/
Summaries are generated and may contain mistakes; the official description above is the record.