A high-severity vulnerability has been identified in multiple Alpine in-vehicle infotainment (IVI) systems. This flaw allows a nearby attacker to remotely execute code via a malicious Bluetooth connection, potentially leading to a complete compromise of the affected head unit. Organizations utilizing vehicles with these systems should prioritize remediation to prevent potential device takeover, data exposure, or unsafe system behavior.

The vulnerability is a stack-based buffer overflow within the Bluetooth AVRCP (Audio/Video Remote Control Profile) stack of affected Alpine products. An unauthenticated attacker within Bluetooth range can send a specially crafted AVRCP packet to the target device. This crafted packet overflows a buffer on the stack, which can overwrite critical control data, including the return address, allowing the attacker to divert the program's execution flow and run arbitrary code with the privileges of the infotainment system's process.

This vulnerability is rated as High severity with a CVSS score of 7.4. Successful exploitation could lead to significant business disruption and risk. An attacker could gain full control of the infotainment system, enabling them to manipulate device functions, access sensitive data synced from paired phones (such as contacts and call history), or potentially use the compromised unit as a pivot point to attack other in-vehicle networks. This poses a direct risk to operational integrity, data privacy, and driver safety, and could result in reputational damage for the organization.

Immediate Action: Apply the security patches provided by Alpine to all affected systems immediately. For vehicle-based systems, this may require a firmware update via USB or a connected mobile application. Prioritize any systems that are frequently used or operate in high-traffic public areas.

Proactive Monitoring: Monitor for anomalous Bluetooth activity, such as frequent, failed, or unusual connection attempts. Review system logs, if available, for any crashes or errors related to the Bluetooth service. End-users should be instructed to report any unexpected behavior from their infotainment systems, such as spontaneous reboots, freezing, or changes in settings.

Compensating Controls: If patching cannot be immediately applied, implement the following controls to reduce the attack surface:

• Disable Bluetooth functionality on the Alpine head unit.
• If Bluetooth is required, unpair all devices and re-pair only trusted, essential devices.
• Disable automatic Bluetooth discovery or visibility on the head unit to make it harder for attackers to find.

Public Exploit Available: false

Given the high severity (CVSS 7.4) and the risk of remote code execution, we strongly recommend that organizations identify all affected Alpine assets within their fleet and apply the vendor-supplied patches as a top priority. Although there is no current evidence of active exploitation, the technical details suggest that a reliable exploit could be developed. Organizations should treat this as a critical vulnerability and implement compensating controls, such as disabling Bluetooth, on any system where patching is delayed.