DOCSIS Security Testing Methodology

Introduction

DOCSIS (Data Over Cable Service Interface Specification) is a technology used to provide high-speed internet access over cable television (CATV) networks. Securing DOCSIS networks is critical to protect subscriber data and prevent unauthorized access to the network.

This methodology provides a structured approach to testing DOCSIS security, covering physical security, CMTS security, cable modem security, and data transmission.

Methodology Phases

1. Planning & Preparation

   • Define testing scope and objectives
   • Obtain necessary permissions and legal clearance
   • Prepare testing environment and equipment

2. Physical Security Assessment

   • Inspect physical infrastructure for vulnerabilities
   • Assess security of CMTS and cable modems
   • Test physical access controls

3. CMTS Security Testing

   • Evaluate CMTS configuration and security settings
   • Test for unauthorized access to CMTS management interfaces
   • Analyze CMTS software and firmware vulnerabilities

4. Cable Modem Security Testing

   • Assess cable modem authentication and authorization
   • Test cable modem configuration and security settings
   • Analyze cable modem software and firmware vulnerabilities

5. Data Transmission Security

   • Evaluate DOCSIS encryption protocols (DES, AES)
   • Test for traffic interception and eavesdropping
   • Analyze data integrity mechanisms

6. Reporting & Remediation

   • Document all findings and vulnerabilities
   • Assess risk and potential impact
   • Provide remediation recommendations

Tools and Resources

DOCSIS security testing requires specialized tools and techniques. Here is a list of useful tools and resources:

• Wireshark for network traffic analysis
• Nmap for port scanning and service discovery
• Cable modem configuration tools
• DOCSIS protocol analyzers