# CVE-2017-6867: Denial of service in Siemens SIMATIC WinCC

> Authenticated administrators can crash services in Siemens SIMATIC WinCC by sending crafted DCOM messages, requiring an upgrade to mitigate.

- **Severity:** Medium 4.9 (`CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 11 May 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-f7g5-6g5q-8c2q

## What is CVE-2017-6867?

CVE-2017-6867 is a medium-severity denial of service vulnerability in Siemens SIMATIC WinCC, published on 11 May 2017. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

A vulnerability was discovered in Siemens SIMATIC WinCC (V7.3 before Upd 11 and V7.4 before SP1), SIMATIC WinCC Runtime Professional (V13 before SP2 and V14 before SP1), SIMATIC WinCC (TIA Portal) Professional (V13 before SP2 and V14 before SP1) that could allow an authenticated, remote attacker who is member of the "administrators" group to crash services by sending specially crafted messages to the DCOM interface.

Weakness: CWE-20 (Improper Input Validation), CWE-787 (Out-of-bounds Write)

## Which versions are affected by CVE-2017-6867?

It affects 3 products.


Products: Siemens Simatic Wincc, Siemens Simatic Wincc \(Tia Portal\), Siemens Simatic Wincc Runtime.

## How do I fix CVE-2017-6867?

No fix has been published for CVE-2017-6867 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-6867 being exploited?

There is no known exploitation of CVE-2017-6867 in the wild and no public exploit code.

## Other vulnerabilities in Siemens SIMATIC WinCC

- [CVE-2016-5744](https://insights.sbomify.com/CVE-2016-5744/): Information disclosure in n/a (high 7.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-6867 and fix it if it is affected.

What it is: CVE-2017-6867 is a medium-severity denial of service vulnerability in Siemens SIMATIC WinCC, published on 11 May 2017. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2017-6867 in the wild and no public exploit code.

Affected product: Siemens SIMATIC WinCC. 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-2017-6867/ (Markdown: https://insights.sbomify.com/CVE-2017-6867/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-6867
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-6867
- OSV: https://osv.dev/vulnerability/CVE-2017-6867

---
From sbomify Insights: https://insights.sbomify.com/CVE-2017-6867/
Summaries are generated and may contain mistakes; the official description above is the record.