# CVE-2019-11891: Incorrect privilege assignment in the app pairing mechanism of the Bosch Smart Home Controller (SHC)

> Attackers with physical access can exploit incorrect privilege assignment in the app pairing mechanism to gain elevated privileges on the Bosch Smart Home Controller.

- **Severity:** High 8.0 (`CVSS:3.0/AV:A/AC:L/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:** 29 May 2019
- **Updated:** 16 Sep 2024
- **Also known as:** GHSA-ghfv-mcwg-v5xw

## What is CVE-2019-11891?

CVE-2019-11891 is a high-severity vulnerability in Bosch Smart Home Controller, published on 29 May 2019. 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 potential incorrect privilege assignment vulnerability exists in the app pairing mechanism of the Bosch Smart Home Controller (SHC) before 9.8.905 that may result in elevated privileges of the adversary's choosing. In order to exploit the vulnerability, the adversary needs physical access to the SHC during the attack.

Weakness: CWE-269 (Improper Privilege Management), CWE-266 (Incorrect Privilege Assignment)

## Which versions are affected by CVE-2019-11891?

It affects 1 product.


Products: Bosch Smart Home Controller Firmware.

## How do I fix CVE-2019-11891?

No fix has been published for CVE-2019-11891 yet. Limit exposure of the affected software until one is available.

## Is CVE-2019-11891 being exploited?

There is no known exploitation of CVE-2019-11891 in the wild and no public exploit code.

## Other vulnerabilities in Bosch Smart Home Controller

- [CVE-2019-11892](https://insights.sbomify.com/CVE-2019-11892/): Improper access control in the JSON-RPC interface of the Bosch Smart Home Controller (SHC) (high 7.5)
- [CVE-2019-11894](https://insights.sbomify.com/CVE-2019-11894/): Improper access control in the backup mechanism of the Bosch Smart Home Controller (SHC) (medium 5.7)
- [CVE-2019-11893](https://insights.sbomify.com/CVE-2019-11893/): Incorrect privilege assignment in the app permission update API of the Bosch Smart Home Controller (SHC) (medium 5.5)
- [CVE-2019-11896](https://insights.sbomify.com/CVE-2019-11896/): Incorrect pviilege assignment in the 3rd party pairing mechanism of the Bosch Smart Home Controller (SHC) (medium 5.5)
- [CVE-2019-11895](https://insights.sbomify.com/CVE-2019-11895/): Improper access control in the JSON-RPC interface of the Bosch Smart Home Controller (SHC) (medium 5.3)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2019-11891 and fix it if it is affected.

What it is: CVE-2019-11891 is a high-severity vulnerability in Bosch Smart Home Controller, published on 29 May 2019. 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-2019-11891 in the wild and no public exploit code.

Affected product: Bosch Smart Home Controller. 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-2019-11891/ (Markdown: https://insights.sbomify.com/CVE-2019-11891/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2019-11891
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2019-11891
- OSV: https://osv.dev/vulnerability/CVE-2019-11891

---
From sbomify Insights: https://insights.sbomify.com/CVE-2019-11891/
Summaries are generated and may contain mistakes; the official description above is the record.