# CVE-2023-32157: Tesla Model 3 bsa_server BIP Heap-based Buffer Overflow Arbitrary Code Execution Vulnerability

> Network-adjacent attackers can execute arbitrary code on Tesla Model 3 vehicles by pairing a malicious Bluetooth device due to a heap buffer overflow.

- **Severity:** Medium 4.6 (`CVSS:3.0/AV:A/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L`)
- **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-hr9q-3pw2-j87w

## What is CVE-2023-32157?

CVE-2023-32157 is a medium-severity memory corruption 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 bsa_server BIP Heap-based Buffer Overflow Arbitrary Code Execution 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 pair a malicious Bluetooth device with the target system in order to exploit this vulnerability.

The specific flaw exists within the bsa_server process. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of an unprivileged user in a sandboxed process.
. Was ZDI-CAN-20737.

Weakness: CWE-787 (Out-of-bounds Write), CWE-122 (Heap-based Buffer Overflow)

## Which versions are affected by CVE-2023-32157?

It affects 1 product.


Products: Tesla Model 3 Firmware.

## How do I fix CVE-2023-32157?

No fix has been published for CVE-2023-32157 yet. Limit exposure of the affected software until one is available.

## Is CVE-2023-32157 being exploited?

There is no known exploitation of CVE-2023-32157 in the wild and no public exploit code.

## Other vulnerabilities in Tesla Model 3

- [CVE-2023-32156](https://insights.sbomify.com/CVE-2023-32156/): Tesla Model 3 Gateway Firmware Signature Validation Bypass Vulnerability (critical 9.0)
- [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)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2023-32157 and fix it if it is affected.

What it is: CVE-2023-32157 is a medium-severity memory corruption 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-2023-32157 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-2023-32157/ (Markdown: https://insights.sbomify.com/CVE-2023-32157/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2023-32157
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2023-32157
- OSV: https://osv.dev/vulnerability/CVE-2023-32157

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From sbomify Insights: https://insights.sbomify.com/CVE-2023-32157/
Summaries are generated and may contain mistakes; the official description above is the record.