# CVE-2016-7987: Denial of service in Siemens SICAM RTU Devices before 08

> Attackers can cause a denial of service on Siemens SICAM RTU devices by sending specially crafted packets to port 2404/TCP, requiring a cold start to recover.

- **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 Feb 2017
- **Updated:** 6 Aug 2024
- **Also known as:** GHSA-q3wf-68hp-39q6

## What is CVE-2016-7987?

CVE-2016-7987 is a high-severity denial of service vulnerability in Siemens SICAM RTU Devices before 08, published on 13 Feb 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in Siemens ETA4 firmware (all versions prior to Revision 08) of the SM-2558 extension module for: SICAM AK, SICAM TM 1703, SICAM BC 1703, and SICAM AK 3. Specially crafted packets sent to Port 2404/TCP could cause the affected device to go into defect mode. A cold start might be required to recover the system, a Denial-of-Service Vulnerability.

Weakness: CWE-19

## Which versions are affected by CVE-2016-7987?

It affects 2 products.


Products: Siemens Eta2 Firmware, Siemens Eta4 Firmware.

## How do I fix CVE-2016-7987?

No fix has been published for CVE-2016-7987 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-7987 being exploited?

There is no known exploitation of CVE-2016-7987 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-7987 and fix it if it is affected.

What it is: CVE-2016-7987 is a high-severity denial of service vulnerability in Siemens SICAM RTU Devices before 08, published on 13 Feb 2017. 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-2016-7987 in the wild and no public exploit code.

Affected product: Siemens SICAM RTU Devices before 08. 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-2016-7987/ (Markdown: https://insights.sbomify.com/CVE-2016-7987/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-7987
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-7987
- OSV: https://osv.dev/vulnerability/CVE-2016-7987

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From sbomify Insights: https://insights.sbomify.com/CVE-2016-7987/
Summaries are generated and may contain mistakes; the official description above is the record.