# CVE-2023-28904: Bypass of secure boot process

> Physical access allows bypassing secure boot via buffer overflow, enabling arbitrary code execution on the infotainment system.

- **Severity:** Medium 5.2 (`CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 28 Jun 2025
- **Updated:** 30 Jun 2025
- **Also known as:** GHSA-gqwg-33mc-9c6j

## What is CVE-2023-28904?

CVE-2023-28904 is a medium-severity memory corruption vulnerability in Preh Car Connect GmbH (JOYNEXT GmbH) Volkswagen MIB3 infotainment system MIB3 OI MQB, published on 28 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A logic flaw leading to a RAM buffer overflow in the bootloader component of the MIB3 infotainment unit allows an attacker with physical access to the MIB3 ECU to bypass firmware signature verification and run arbitrary code in the infotainment system at boot process.

Weakness: CWE-120 (Buffer Copy without Checking Size of Input)

## Which versions are affected by CVE-2023-28904?


## How do I fix CVE-2023-28904?

No fix has been published for CVE-2023-28904 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-28904 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-28904 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-28904 and fix it if it is affected.

What it is: CVE-2023-28904 is a medium-severity memory corruption vulnerability in Preh Car Connect GmbH (JOYNEXT GmbH) Volkswagen MIB3 infotainment system MIB3 OI MQB, published on 28 Jun 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-28904 exists.

Affected product: Preh Car Connect GmbH (JOYNEXT GmbH) Volkswagen MIB3 infotainment system MIB3 OI MQB. 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-2023-28904/ (Markdown: https://insights.sbomify.com/CVE-2023-28904/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-28904
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-28904
- OSV: https://osv.dev/vulnerability/CVE-2023-28904

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-28904/
Summaries are generated and may contain mistakes; the official description above is the record.