# CVE-2016-8673: Cross-site request forgery in n/a

> Remote attackers can perform actions with authenticated user permissions via CSRF on the integrated web server of affected SIMATIC devices.

- **Severity:** High 8.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 23 Nov 2016
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-4v5h-4j58-whhg

## What is CVE-2016-8673?

CVE-2016-8673 is a high-severity vulnerability in n/a, published on 23 Nov 2016. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability has been identified in SIMATIC CP 343-1 Advanced (incl. SIPLUS NET variant) (All versions < V3.0.53), SIMATIC CP 443-1 Advanced (incl. SIPLUS NET variant) (All versions < V3.2.17), SIMATIC S7-300 PN/DP CPU family (incl. SIPLUS variants) (All versions), SIMATIC S7-400 PN/DP CPU family (incl. SIPLUS variants) (All versions). The integrated web server at port 80/TCP or port 443/TCP of the affected devices could allow remote attackers to perform actions with the permissions of an authenticated user, provided the targeted user has an active session and is induced to trigger the malicious request.

Weakness: CWE-352 (Cross-Site Request Forgery)

## Which versions are affected by CVE-2016-8673?

It affects 4 products.


Products: Siemens Simatic Cp 343-1 Firmware, Siemens Simatic Cp 443-1 Firmware, Siemens Simatic S7 300 Cpu Firmware, Siemens Simatic S7 400 Cpu Firmware.

## How do I fix CVE-2016-8673?

No fix has been published for CVE-2016-8673 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-8673 being exploited?

There is no known exploitation of CVE-2016-8673 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2015-8214](https://insights.sbomify.com/CVE-2015-8214/): Missing authorization in n/a (critical 9.7)
- [CVE-2023-51440](https://insights.sbomify.com/CVE-2023-51440/): Denial of service in SIMATIC CP 343-1 (high 7.5)
- [CVE-2018-4843](https://insights.sbomify.com/CVE-2018-4843/): Other in SIMATIC CP 343-1 (incl. SIPLUS variants) (medium 6.5)
- [CVE-2016-8672](https://insights.sbomify.com/CVE-2016-8672/): Information disclosure in n/a (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-8673 and fix it if it is affected.

What it is: CVE-2016-8673 is a high-severity vulnerability in n/a, published on 23 Nov 2016. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2016-8673 in the wild and no public exploit code.

Affected product: n/a. 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-2016-8673/ (Markdown: https://insights.sbomify.com/CVE-2016-8673/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-8673
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-8673
- OSV: https://osv.dev/vulnerability/CVE-2016-8673

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-8673/
Summaries are generated and may contain mistakes; the official description above is the record.