# CVE-2023-28896: Weak encoding for password in UDS services

> Attackers with physical access can decode weakly encrypted UDS passwords to bypass security controls on the infotainment system.

- **Severity:** Low 3.3 (`CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N`)
- **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:** 1 Dec 2023
- **Updated:** 2 Aug 2024
- **Also known as:** GHSA-cg44-3c54-5q5h

## What is CVE-2023-28896?

CVE-2023-28896 is a low-severity vulnerability in JOYNEXT MIB3 Infotainment Unit, published on 1 Dec 2023. 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

Access to critical Unified Diagnostics Services (UDS) of the Modular Infotainment Platform 3 (MIB3) infotainment is transmitted via Controller Area Network (CAN) bus in a form that can be easily decoded by attackers with physical access to the vehicle.

Vulnerability discovered on Škoda Superb III (3V3) - 2.0 TDI manufactured in 2022.

Weakness: CWE-326 (Inadequate Encryption Strength), CWE-261 (Weak Encoding for Password)

## Which versions are affected by CVE-2023-28896?

It affects 1 product.


Products: Preh Mib3 Firmware.

## How do I fix CVE-2023-28896?

No fix has been published for CVE-2023-28896 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-28896 being exploited?

There is no known exploitation of CVE-2023-28896 in the wild and no public exploit code.

## Other vulnerabilities in JOYNEXT MIB3 Infotainment Unit

- [CVE-2023-28895](https://insights.sbomify.com/CVE-2023-28895/): Hard-coded password for access to power controller chip memory (low 3.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-28896 and fix it if it is affected.

What it is: CVE-2023-28896 is a low-severity vulnerability in JOYNEXT MIB3 Infotainment Unit, published on 1 Dec 2023. 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-2023-28896 in the wild and no public exploit code.

Affected product: JOYNEXT MIB3 Infotainment Unit. 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-2023-28896/ (Markdown: https://insights.sbomify.com/CVE-2023-28896/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-28896
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-28896
- OSV: https://osv.dev/vulnerability/CVE-2023-28896

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-28896/
Summaries are generated and may contain mistakes; the official description above is the record.