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

Medium 4.6 Published 3 May 2024 Updated 18 Sep 2024

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

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

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, CWE-122

Which versions are affected by CVE-2023-32157?

It affects 1 product.

Products include 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.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2023-32157 being exploited?

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

Sources

Also known as GHSA-hr9q-3pw2-j87w.