# CVE-2018-15478: Auth bypass in n/a

> Attackers can hijack unregistered myStrom IoT devices by guessing MAC-based activation codes, gaining control before the legitimate owner registers them.

- **Severity:** High 8.1 (`CVSS:3.0/AV:N/AC:H/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:** 30 Aug 2018
- **Updated:** 5 Aug 2024
- **Also known as:** GHSA-g23c-wqcr-3333

## What is CVE-2018-15478?

CVE-2018-15478 is a high-severity authentication bypass vulnerability in n/a, published on 30 Aug 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

An issue was discovered in myStrom WiFi Switch V1 before 2.66, WiFi Switch V2 before 3.80, WiFi Switch EU before 3.80, WiFi Bulb before 2.58, WiFi LED Strip before 3.80, WiFi Button before 2.73, and WiFi Button Plus before 2.73. The process of registering a device with a cloud account was based on an activation code derived from the device MAC address. By guessing valid MAC addresses or using MAC addresses printed on devices in shops and reverse engineering the protocol, an attacker would have been able to register previously unregistered devices to their account. When the rightful owner would have connected them after purchase to their WiFi network, the devices would not have registered with their account, would subsequently not have been controllable from the owner's mobile app, and would not have been visible in the owner's account. Instead, they would have been under control of the attacker.

Weakness: CWE-287 (Improper Authentication)

## Which versions are affected by CVE-2018-15478?

It affects 6 products.


Products: Mystrom Wifi Bulb Firmware, Mystrom Wifi Button Firmware, Mystrom Wifi Button Plus Firmware, Mystrom Wifi Led Strip Firmware, Mystrom Wifi Switch Eu Firmware, Mystrom Wifi Switch Firmware.

## How do I fix CVE-2018-15478?

No fix has been published for CVE-2018-15478 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-15478 being exploited?

There is no known exploitation of CVE-2018-15478 in the wild and no public exploit code.

## Other vulnerabilities in n/a

- [CVE-2018-15480](https://insights.sbomify.com/CVE-2018-15480/): Business logic in n/a (high 8.8)
- [CVE-2018-15476](https://insights.sbomify.com/CVE-2018-15476/): Security feature bypass in n/a (high 8.1)
- [CVE-2018-15479](https://insights.sbomify.com/CVE-2018-15479/): Auth bypass in n/a (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-15478 and fix it if it is affected.

What it is: CVE-2018-15478 is a high-severity authentication bypass vulnerability in n/a, published on 30 Aug 2018. 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-2018-15478 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-2018-15478/ (Markdown: https://insights.sbomify.com/CVE-2018-15478/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-15478
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-15478
- OSV: https://osv.dev/vulnerability/CVE-2018-15478

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-15478/
Summaries are generated and may contain mistakes; the official description above is the record.