# CVE-2018-3832: File upload in Insteon

> Attackers can upload malicious firmware to Insteon Hubs via HTTP endpoints, enabling arbitrary code execution and full device compromise.

- **Severity:** Critical 9.9 (`CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 23 Aug 2018
- **Updated:** 17 Sep 2024
- **Also known as:** GHSA-mv9v-5rx6-rmv3

## What is CVE-2018-3832?

CVE-2018-3832 is a critical vulnerability in Insteon, published on 23 Aug 2018. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

An exploitable firmware update vulnerability exists in Insteon Hub running firmware version 1013. The HTTP server allows for uploading arbitrary MPFS binaries that could be modified to enable access to hidden resources which allow for uploading unsigned firmware images to the device. To trigger this vulnerability, an attacker can upload an MPFS binary via the '/mpfsupload' HTTP form and later on upload the firmware via a POST request to 'firmware.htm'.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2018-3832?

It affects 1 product.


Products: Insteon Hub 2245-222 Firmware.

## How do I fix CVE-2018-3832?

No fix has been published for CVE-2018-3832 yet. Limit exposure of the affected software until one is available.

## Is CVE-2018-3832 being exploited?

There is no known exploitation of CVE-2018-3832 in the wild and no public exploit code.

## Other vulnerabilities in Insteon

- [CVE-2017-14443](https://insights.sbomify.com/CVE-2017-14443/): Information disclosure in n/a (critical 9.6)
- [CVE-2018-3833](https://insights.sbomify.com/CVE-2018-3833/): Security feature bypass in Insteon (high 8.6)
- [CVE-2017-14453](https://insights.sbomify.com/CVE-2017-14453/): Memory corruption in Insteon Hub 2245-222 (high 8.5)
- [CVE-2017-14455](https://insights.sbomify.com/CVE-2017-14455/): Memory corruption in Insteon Hub 2245-222 (high 8.5)
- [CVE-2017-16337](https://insights.sbomify.com/CVE-2017-16337/): Memory corruption in Insteon Hub 2245-222 (high 8.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2018-3832 and fix it if it is affected.

What it is: CVE-2018-3832 is a critical vulnerability in Insteon, published on 23 Aug 2018. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2018-3832 in the wild and no public exploit code.

Affected product: Insteon. 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-2018-3832/ (Markdown: https://insights.sbomify.com/CVE-2018-3832/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2018-3832
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2018-3832
- OSV: https://osv.dev/vulnerability/CVE-2018-3832

---
From sbomify Insights: https://insights.sbomify.com/CVE-2018-3832/
Summaries are generated and may contain mistakes; the official description above is the record.