Autel MaxiCharger AC Elite Business C50 Websocket stack-based overflow

Summaryinfo

A vulnerability was found in Autel MaxiCharger AC Elite Business C50 and classified as critical. The affected element is an unknown function of the component Websocket Handler. Such manipulation leads to stack-based overflow. This vulnerability is uniquely identified as CVE-2024-23967. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Autel MaxiCharger AC Elite Business C50 (the affected version is unknown). Affected by this issue is an unknown code of the component Websocket Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. CVE summarizes:

Autel MaxiCharger AC Elite Business C50 WebSocket Base64 Decoding 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 chargers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of base64-encoded data within WebSocket messages. 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-23230

The advisory is available at zerodayinitiative.com. This vulnerability is handled as CVE-2024-23967 since 01/25/2024. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 10/04/2024).

Upgrading eliminates this vulnerability.

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Productinfo

Vendor

• Autel

Name

• MaxiCharger AC Elite Business C50

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

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