CVE-2025-32063: BOSCH Infotainment ECU Auth Bypass Flaw

CVE-2025-32063 Overview

CVE-2025-32063 is a misconfiguration vulnerability affecting the Infotainment ECU manufactured by BOSCH. The vulnerability occurs during the startup phase of a specific systemd service, resulting in the activation of developer features that should be disabled in production environments. Specifically, the firewall is disabled and an SSH server is launched, exposing the vehicle's infotainment system to potential unauthorized access.

This vulnerability was first identified on Nissan Leaf ZE1 vehicles manufactured in 2020, highlighting security concerns in automotive infotainment systems that could allow attackers with physical access to gain full control of the ECU.

Critical Impact

Physical access to the vehicle could allow attackers to exploit disabled firewall protections and SSH access to compromise the infotainment system, potentially enabling lateral movement to other vehicle networks.

Affected Products

• BOSCH Infotainment ECU
• Nissan Leaf ZE1 (2020 model year)
• Vehicles equipped with BOSCH-manufactured infotainment systems

Discovery Timeline

• 2026-02-15 - CVE-2025-32063 published to NVD
• 2026-02-18 - Last updated in NVD database

Technical Details for CVE-2025-32063

Vulnerability Analysis

This vulnerability is classified under CWE-306 (Missing Authentication for Critical Function), indicating that the misconfigured systemd service lacks proper security controls that should authenticate users before enabling sensitive developer features.

The core issue stems from a production deployment containing debug/developer configurations that should have been removed or disabled before vehicle release. During the systemd startup sequence, the misconfigured service activates two critical developer features: it disables the system firewall and starts an SSH server. These features, intended solely for development and debugging purposes, create a significant attack surface when present in production vehicles.

The physical attack vector means an attacker would need direct access to the vehicle's infotainment system, either through physical ports or potentially via connected diagnostic interfaces. Once exploited, the attacker gains SSH access to the infotainment ECU without authentication barriers, potentially compromising vehicle data, user privacy, and creating pathways for further system exploitation.

Root Cause

The root cause of CVE-2025-32063 is a misconfiguration in the systemd service initialization process within the BOSCH Infotainment ECU. Developer features designed for debugging and testing were not properly disabled or removed before production deployment. The systemd service responsible for system initialization incorrectly activates these features during boot, disabling firewall protections and launching an SSH daemon without proper access controls.

This represents a classic case of insecure default configuration where development artifacts persist into production environments, violating the principle of secure-by-default design.

Attack Vector

The vulnerability requires physical access to exploit. An attacker with physical proximity to the affected vehicle could:

1. Connect to the vehicle's infotainment system through available network interfaces
2. Discover the running SSH service with disabled firewall protections
3. Attempt to authenticate to the SSH server (potentially using default or weak credentials)
4. Gain unauthorized shell access to the infotainment ECU
5. Explore lateral movement opportunities within the vehicle's internal networks

The attack does not require prior authentication or user interaction, making it particularly dangerous once physical access is obtained. The Black Hat Presentation on Nissan Leaf provides detailed technical analysis of this vulnerability class.

Detection Methods for CVE-2025-32063

Indicators of Compromise

• Unexpected SSH connections or authentication attempts logged on the infotainment system
• Disabled firewall status detected during system boot or runtime diagnostics
• Anomalous network traffic originating from the infotainment ECU
• Unauthorized shell sessions or command execution on the ECU

Detection Strategies

• Monitor systemd service logs for unexpected activation of developer services during boot
• Implement network monitoring to detect SSH daemon presence and connection attempts on infotainment systems
• Perform regular configuration audits to verify firewall status and service configurations
• Deploy automotive IDS solutions to detect unauthorized network activity within the vehicle CAN bus and Ethernet networks

Monitoring Recommendations

• Enable comprehensive logging on vehicle infotainment systems where supported
• Implement periodic security scans of vehicle ECUs during maintenance windows
• Monitor for firmware modifications or unauthorized service activations
• Establish baseline network behavior profiles for infotainment systems to detect anomalies

How to Mitigate CVE-2025-32063

Immediate Actions Required

• Contact BOSCH and Nissan for official security patches or firmware updates addressing this misconfiguration
• Limit physical access to affected vehicles to trusted personnel only
• Review vehicle diagnostic port security and restrict unauthorized connections
• Consider network segmentation to isolate infotainment systems from critical vehicle networks

Patch Information

Vehicle owners should consult with their dealership or manufacturer for firmware updates addressing this vulnerability. Refer to the PCA Cybersecurity Advisory on Nissan for the latest remediation guidance from security researchers who identified this issue.

Organizations managing fleet vehicles should prioritize firmware update deployment across affected Nissan Leaf ZE1 units manufactured in 2020.

Workarounds

• Implement additional physical security measures to restrict access to the vehicle's diagnostic interfaces
• Where possible, configure network filtering upstream to block unauthorized SSH connections to the infotainment system
• Consider disabling the SSH service manually if manufacturer guidance supports this approach
• Monitor infotainment system logs for signs of unauthorized access attempts

# Note: The following is a general recommendation for automotive security
# Consult manufacturer documentation before making any ECU changes

# Verify SSH service status (if diagnostic access is available)
systemctl status sshd

# Check firewall status
iptables -L -n

# Contact BOSCH/Nissan for official remediation procedures