A vulnerability was found in Hangzhou Hopechart HQT401 201808021036. It has been declared as critical. Affected by this vulnerability is an unknown function of the component MQTT Handler. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Insufficient authentication in the MQTT backend (broker) allows an attacker to access and even manipulate the telemetry data of the entire fleet of vehicles using the HopeChart HQT-401 telematics unit. Other models are possibly affected too. Multiple vulnerabilities were identified: - The MQTT backend does not require authentication, allowing unauthorized connections from an attacker. - The vehicles publish their telemetry data (e.g. GPS Location, speed, odometer, fuel, etc) as messages in public topics. The backend also sends commands to the vehicles as MQTT posts in public topics. As a result, an attacker can access the confidential data of the entire fleet that is managed by the backend. - The MQTT messages sent by the vehicles or the backend are not encrypted or authenticated. An attacker can create and post messages to impersonate a vehicle or the backend. The attacker could then, for example, send incorrect information to the backend about the vehicle's location. - The backend can inject data into a vehicle´s CAN bus by sending a specific MQTT message on a public topic. Because these messages are not authenticated or encrypted, an attacker could impersonate the backend, create a fake message and inject CAN data in any vehicle managed by the backend. The confirmed version is 201808021036, however further versions have been also identified as potentially impacted.

The weakness was released 06/01/2023. The advisory is shared at garage.asrg.io. This vulnerability is known as CVE-2023-3028. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/25/2023).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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• Hangzhou Hopechart

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• HQT401

Version

• 201808021036

CPE 2.3info

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CPE 2.2info

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