CVE-2024-7795 Memory corruption in MaxiCharger AC Elite Business C50

High 8.8 Published 21 Aug 2024 Updated 22 Aug 2024

Network-adjacent attackers can execute arbitrary code on Autel MaxiCharger AC Elite Business C50 EV chargers via a stack-based buffer overflow in the BLE command handler.

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

What is CVE-2024-7795?

CVE-2024-7795 is a high-severity memory corruption vulnerability in Autel MaxiCharger AC Elite Business C50, published on 21 Aug 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Autel MaxiCharger AC Elite Business C50 AppAuthenExchangeRandomNum Stack-Based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Autel MaxiCharger AC Elite Business C50 EV chargers. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the handling of the AppAuthenExchangeRandomNum BLE command. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the device. Was ZDI-CAN-23384.

Weakness: CWE-119, CWE-121

Which versions are affected by CVE-2024-7795?

It affects 1 product.

Products include Autel Maxicharger Ac Elite Business C50 Firmware.

How do I fix CVE-2024-7795?

No fix has been published for CVE-2024-7795 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-2024-7795 being exploited?

There is no known exploitation of CVE-2024-7795 in the wild and no public exploit code.

Sources

Also known as GHSA-64gw-gxfq-f34c.