# CVE-2023-32156: Tesla Model 3 Gateway Firmware Signature Validation Bypass Vulnerability

> Network-adjacent attackers with prior infotainment access can bypass firmware signature validation to execute arbitrary code on the Gateway ECU.

- **Severity:** Critical 9.0 (`CVSS:3.0/AV:A/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:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 May 2024
- **Updated:** 18 Sep 2024
- **Also known as:** GHSA-v757-7wm5-j6j9

## What is CVE-2023-32156?

CVE-2023-32156 is a critical vulnerability in Tesla Model 3, published on 3 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

Tesla Model 3 Gateway Firmware Signature Validation Bypass Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected Tesla Model 3 vehicles. An attacker must first obtain the ability to execute privileged code on the Tesla infotainment system in order to exploit this vulnerability.

The specific flaw exists within the handling of firmware updates. The issue results from improper error-handling during the update process. An attacker can leverage this vulnerability to execute code in the context of Tesla's Gateway ECU.
. Was ZDI-CAN-20734.

Weakness: CWE-367 (Time-of-check Time-of-use (TOCTOU) Race Condition)

## Which versions are affected by CVE-2023-32156?

It affects 1 product.


Products: Tesla Model 3 Firmware.

## How do I fix CVE-2023-32156?

No fix has been published for CVE-2023-32156 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-32156 being exploited?

There is no known exploitation of CVE-2023-32156 in the wild and no public exploit code.

## Other vulnerabilities in Tesla Model 3

- [CVE-2022-42430](https://insights.sbomify.com/CVE-2022-42430/): Use after free in Model 3 (high 8.8)
- [CVE-2022-42431](https://insights.sbomify.com/CVE-2022-42431/): Memory corruption in Model 3 (high 8.8)
- [CVE-2019-9977](https://insights.sbomify.com/CVE-2019-9977/): Code injection in n/a (high 8.8)
- [CVE-2023-32155](https://insights.sbomify.com/CVE-2023-32155/): Tesla Model 3 bcmdhd Out-Of-Bounds Write Local Privilege Escalation Vulnerability (high 7.8)
- [CVE-2022-3093](https://insights.sbomify.com/CVE-2022-3093/): Code injection in Model 3 (high 7.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-32156 and fix it if it is affected.

What it is: CVE-2023-32156 is a critical vulnerability in Tesla Model 3, published on 3 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2023-32156 in the wild and no public exploit code.

Affected product: Tesla Model 3. 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-2023-32156/ (Markdown: https://insights.sbomify.com/CVE-2023-32156/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-32156
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-32156
- OSV: https://osv.dev/vulnerability/CVE-2023-32156

---
From sbomify Insights: https://insights.sbomify.com/CVE-2023-32156/
Summaries are generated and may contain mistakes; the official description above is the record.