EUVD-2023-31482 Technical Analysis Report

Executive Summary

This vulnerability (CVE-2023-27746) affects the BlackVue DR750-2CH LTE dashcam firmware version 1.012_2022.10.26, exposing a critical authentication weakness through a weak default WPA2 passphrase. With a CVSS v3.1 score of 9.8 (Critical), this vulnerability presents significant security risks to vehicle owners and fleet operators utilizing these devices.

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1. Vulnerability Assessment and Severity Evaluation

Severity Classification

• CVSS v3.1 Base Score: 9.8 (Critical)
• EPSS Score: 9% (probability of exploitation in the wild)
• Attack Vector: Network (AV:N)
• Attack Complexity: Low (AC:L)
• Privileges Required: None (PR:N)
• User Interaction: None (UI:N)

Technical Assessment

The vulnerability stems from inadequate password entropy in the default WPA2 passphrase configuration. This represents a CWE-521: Weak Password Requirements vulnerability class. The critical severity is justified by:

• No authentication barriers: Attackers require no prior credentials
• Network-based exploitation: Remote attack capability within WiFi range
• Complete system compromise: Full confidentiality, integrity, and availability impact
• Zero user interaction: Passive exploitation possible

Risk Factors

The 9% EPSS score indicates moderate exploitation likelihood, though this may be underestimated given:

• Public proof-of-concept availability (GitHub repositories)
• Widespread device deployment in vehicles
• Increasing IoT-targeted attack campaigns

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2. Potential Attack Vectors and Exploitation Methods

Primary Attack Vector: WPA2 Handshake Interception

Attack Sequence:

1. Reconnaissance Phase

   • Attacker identifies BlackVue DR750-2CH LTE WiFi access point
   • Device broadcasts SSID typically following predictable naming conventions
   • Physical proximity required (WiFi range: 10-100 meters depending on environment)

2. Handshake Capture

   • Passive monitoring to capture WPA2 4-way handshake
   • Active deauthentication attack to force client reconnection
   • Tools: aircrack-ng, hcxdumptool, Wireshark

3. Credential Cracking

   • Offline brute-force attack against captured handshake
   • Weak default passphrase vulnerable to dictionary attacks
   • Estimated cracking time: Minutes to hours with standard hardware
   • Tools: hashcat, aircrack-ng, John the Ripper

4. Network Access

   • Successful authentication to device WiFi network
   • Access to dashcam management interface
   • Potential lateral movement to connected mobile applications

Secondary Attack Vectors

Physical Proximity Attacks:

• Parking lot surveillance targeting multiple vehicles
• Targeted attacks against high-value individuals
• Fleet vehicle compromise in centralized locations

Supply Chain Considerations:

• Pre-configured devices with unchanged default credentials
• Bulk deployments without security hardening

Exploitation Impact Scenarios

Confidentiality Breach:

• Access to recorded video footage (surveillance, privacy violations)
• GPS location data extraction
• Personal information from connected mobile apps

Integrity Compromise:

• Video footage manipulation or deletion
• Firmware modification for persistent access
• Configuration tampering

Availability Disruption:

• Device functionality disruption
• Denial of service attacks
• Ransomware deployment potential

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3. Affected Systems and Software Versions

Confirmed Affected Products

• Device Model: BlackVue DR750-2CH LTE
• Firmware Version: v.1.012_2022.10.26
• Component: WiFi authentication subsystem

Potentially Affected Products

Given common firmware practices, related BlackVue models may share similar vulnerabilities:

• DR750-2CH (non-LTE variants)
• Other DR750 series devices
• Devices sharing the same firmware codebase

Deployment Context

Affected Sectors:

• Personal vehicle owners (consumer market)
• Commercial fleet operators
• Ride-sharing services (Uber, Lyft, etc.)
• Law enforcement vehicles
• Corporate transportation
• Rental car services

Geographic Distribution:

• Global deployment with significant European market presence
• Particular concern for GDPR-regulated environments

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4. Recommended Mitigation Strategies

Immediate Actions (Priority 1)

1. Password Change Protocol

Action: Change default WiFi passphrase immediately
Requirements:
- Minimum 16 characters
- Mixed case, numbers, special characters
- Avoid dictionary words or predictable patterns
- Unique per device (fleet deployments)

2. Firmware Update

• Check for security patches from BlackVue
• Monitor vendor security advisories
• Implement automated update mechanisms where available

3. Network Isolation

• Disable WiFi when not actively needed
• Use WiFi only in trusted environments
• Implement time-based WiFi activation

Short-term Mitigations (Priority 2)

Access Control Measures:

• Enable MAC address filtering if supported
• Implement connection logging and monitoring
• Configure alerts for unauthorized access attempts

Network Segmentation:

• Isolate dashcam network from other vehicle systems
• Prevent bridging to mobile device networks
• Use dedicated mobile devices for dashcam management

Long-term Strategic Controls (Priority 3)

Organizational Policies:

Fleet Management Recommendations:
1. Mandatory security configuration baseline
2. Regular security audits of deployed devices
3. Incident response procedures for compromised devices
4. Vendor security requirements in procurement
5. End-of-life device replacement schedules

Technical Controls:

• Implement network intrusion detection for fleet WiFi
• Deploy centralized configuration management
• Establish secure firmware distribution channels
• Consider VPN-based remote access alternatives

Vendor Recommendations

For BlackVue:

• Implement forced password change on first use
• Generate unique default passwords per device
• Provide security update notifications
• Implement certificate-based authentication
• Conduct third-party security audits

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5. Impact on European Cybersecurity Landscape

GDPR Compliance Implications

Data Protection Concerns:

• Dashcam footage constitutes personal data under GDPR Article 4(1)
• Video recordings may capture identifiable individuals
• GPS data represents location tracking (special category consideration)

Controller Obligations:

• Article 5(1)(f): Integrity and confidentiality principle violated
• Article 32: Inadequate technical security measures
• Article 33: Breach notification requirements if exploited
• Article 34: Individual notification may be required

Potential Penalties:

• Up to €20 million or 4% of annual global turnover
• Regulatory investigations and audits
• Reputational damage

NIS2 Directive Considerations

Relevant Sectors:

• Transport sector entities
• Fleet management services
• Critical infrastructure with vehicle fleets

Security Requirements:

• Risk management measures inadequate
• Incident reporting obligations triggered
• Supply chain security implications

ENISA Perspective

IoT Security Framework Alignment:

• Baseline security requirements not met
• Secure by default principle violated
• Vulnerability disclosure process concerns

Threat Landscape Impact:

• Contributes to IoT botnet recruitment potential
• Privacy invasion attack surface
• Physical security implications (vehicle tracking)

European Cybersecurity Certification Scheme (EUCS)

Certification Implications:

• Device would fail basic security certification
• Market access restrictions potential under future regulations
• Consumer trust implications

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6. Technical Details for Security Professionals

Vulnerability Technical Breakdown

Authentication Mechanism Analysis:

Protocol: WPA2-PSK (Pre-Shared Key)
Encryption: AES-CCMP
Key Derivation: PBKDF2-SHA1
Iterations: 4096
Weakness: Insufficient passphrase entropy

Default Passphrase Characteristics:

• Predictable pattern or short length (specific pattern not disclosed for security)
• Insufficient entropy for brute-force resistance
• No device-unique randomization
• Likely 8-12 characters (WPA2 minimum is 8)

Exploitation Technical Details

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