# CVE-2017-12739: Code injection in Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00

> Unauthenticated remote attackers can execute arbitrary code on Siemens SICAM RTU COM modules via the integrated web server.

- **Severity:** Critical 9.8 (`CVSS:3.0/AV:N/AC:L/PR:N/UI:N/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:** Not needed
- **Fix available:** No
- **Published:** 15 Nov 2017
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-m3j7-g6v4-2mp3

## What is CVE-2017-12739?

CVE-2017-12739 is a critical code injection vulnerability in Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00, published on 15 Nov 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered on Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00. The integrated web server (port 80/tcp) of the affected devices could allow unauthenticated remote attackers to execute arbitrary code on the affected device.

Weakness: CWE-1188 (Initialization of a Resource with an Insecure Default)

## Which versions are affected by CVE-2017-12739?

It affects 1 product.


Products: Siemens Sm-2556 Firmware.

## How do I fix CVE-2017-12739?

No fix has been published for CVE-2017-12739 yet. Limit exposure of the affected software until one is available.

## Is CVE-2017-12739 being exploited?

There is no known exploitation of CVE-2017-12739 in the wild and no public exploit code.

## Other vulnerabilities in Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00

- [CVE-2017-12738](https://insights.sbomify.com/CVE-2017-12738/): Cross-site scripting in Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00 (medium 6.1)
- [CVE-2017-12737](https://insights.sbomify.com/CVE-2017-12737/): Information disclosure in Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00 (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2017-12739 and fix it if it is affected.

What it is: CVE-2017-12739 is a critical code injection vulnerability in Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00, published on 15 Nov 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-2017-12739 in the wild and no public exploit code.

Affected product: Siemens SICAM RTUs SM-2556 COM Modules with the firmware variants ENOS00, ERAC00, ETA2, ETLS00, MODi00, and DNPi00. 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-2017-12739/ (Markdown: https://insights.sbomify.com/CVE-2017-12739/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2017-12739
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2017-12739
- OSV: https://osv.dev/vulnerability/CVE-2017-12739

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From sbomify Insights: https://insights.sbomify.com/CVE-2017-12739/
Summaries are generated and may contain mistakes; the official description above is the record.