# CVE-2016-7112: Auth bypass in n/a

> Attackers can bypass authentication on the web interface to perform administrative operations on SIPROTEC EN100 Ethernet modules.

- **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:** 6 Sep 2016
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-j885-v5w5-36pc

## What is CVE-2016-7112?

CVE-2016-7112 is a critical authentication bypass vulnerability in n/a, published on 6 Sep 2016. 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 Firmware variant PROFINET IO for EN100 Ethernet module : All versions < V1.04.01; Firmware variant Modbus TCP for EN100 Ethernet module : All versions < V1.11.00; Firmware variant DNP3 TCP for EN100 Ethernet module : All versions < V1.03; Firmware variant IEC 104 for EN100 Ethernet module : All versions < V1.21; EN100 Ethernet module included in SIPROTEC Merging Unit 6MU80 : All versions < 1.02.02. Attackers with network access to the device's web interface (port 80/tcp) could possibly circumvent authentication and perform certain administrative operations.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2016-7112?

It affects 1 product.


Products: Siemens En100 Ethernet Module Firmware.

## How do I fix CVE-2016-7112?

No fix has been published for CVE-2016-7112 yet. Limit exposure of the affected software until one is available.

## Is CVE-2016-7112 being exploited?

There is no known exploitation of CVE-2016-7112 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2016-7114](https://insights.sbomify.com/CVE-2016-7114/): Auth bypass in n/a (high 8.8)
- [CVE-2016-7113](https://insights.sbomify.com/CVE-2016-7113/): Denial of service in n/a (high 7.5)
- [CVE-2018-16563](https://insights.sbomify.com/CVE-2018-16563/): Denial of service in Firmware variant DNP3 TCP for EN100 Ethernet module (medium 5.9)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2016-7112 and fix it if it is affected.

What it is: CVE-2016-7112 is a critical authentication bypass vulnerability in n/a, published on 6 Sep 2016. 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-2016-7112 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-2016-7112/ (Markdown: https://insights.sbomify.com/CVE-2016-7112/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2016-7112
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2016-7112
- OSV: https://osv.dev/vulnerability/CVE-2016-7112

---
From sbomify Insights: https://insights.sbomify.com/CVE-2016-7112/
Summaries are generated and may contain mistakes; the official description above is the record.