# CVE-2024-40892: Firewalla BTLE Weak Credentials

> Attackers can sniff Bluetooth traffic to obtain license UUIDs, provision SSH credentials, and gain privileged access to the device.

- **Severity:** High 7.1 (`CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 Aug 2024
- **Updated:** 21 Aug 2024
- **Also known as:** GHSA-rhjx-jwv4-jj63

## What is CVE-2024-40892?

CVE-2024-40892 is a high-severity vulnerability in Firewalla Box Software, published on 12 Aug 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

### Official description

A weak credential vulnerability exists in Firewalla Box Software versions before 1.979. This vulnerability allows a physically close attacker to use the license UUID for authentication and provision SSH credentials over the Bluetooth Low-Energy (BTLE) interface. Once an attacker gains access to the LAN, they could log into the SSH interface using the provisioned credentials. The license UUID can be acquired through plain-text Bluetooth sniffing, reading the QR code on the bottom of the device, or brute-forcing the UUID (though this is less likely).

Weakness: CWE-1391 (Use of Weak Credentials)

## Which versions are affected by CVE-2024-40892?


## How do I fix CVE-2024-40892?

No fix has been published for CVE-2024-40892 yet. Limit exposure of the affected software until one is available.

## Is CVE-2024-40892 being exploited?

There is no known exploitation of CVE-2024-40892 in the wild and no public exploit code.

Public exploit code:

- Proof of Concept code for interaction with Firewalla via Bluetooth Low-Energy and exploitation of CVE-2024-40892 / CVE-2024-40893 (github_poc): https://github.com/xen0bit/fwbt

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2024-40892 and fix it if it is affected.

What it is: CVE-2024-40892 is a high-severity vulnerability in Firewalla Box Software, published on 12 Aug 2024. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2024-40892 in the wild and no public exploit code.

Affected product: Firewalla Box Software. 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-2024-40892/ (Markdown: https://insights.sbomify.com/CVE-2024-40892/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2024-40892
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-40892
- OSV: https://osv.dev/vulnerability/CVE-2024-40892

---
From sbomify Insights: https://insights.sbomify.com/CVE-2024-40892/
Summaries are generated and may contain mistakes; the official description above is the record.