Pentest for Carrier VoIP Provisioning Portal

The client required a comprehensive penetration testing engagement for a Carrier VoIP Provisioning Portal Server, which served as a secure web-based platform for subscriber provisioning, device management, and carrier-grade service configuration within large-scale VoIP communication networks. The scope covered:

• Test methodology
• Test procedure
• Summary of identified vulnerabilities and actionable recommendations

• Test methodology:
  • Testing Approach: Black box
  • Test Category: Web Application Security Assessment
  • Objective: to assess the publicly accessible provisioning portal for weaknesses that could allow unauthorized access, information disclosure, or compromise of service availability or integrity.
  • Tools Used:
    • Nmap: Network and port scanning to identify open services and protocols
    • Nessus: Vulnerability scanner to identify known CVEs and configuration issues
    • Burp Suite Professional: Web proxy to analyze and manipulate HTTP requests and responses
• Test procedure:
  • Initial Network & Service Discovery
    • Performed Nmap scanning to enumerate open ports, services, and server banners.
    • Detected a web server running on port 443 with valid SSL certificate and HTTP 302 redirection from port 80.
    • Identified potential entry points, including the login page, API endpoints, and static assets directory.
  • Vulnerability Scanning
    • Ran Nessus scan to detect vulnerabilities in the web stack and known software.
    • Discovered version information of underlying web server and libraries.
    • Highlighted software dependencies with outdated versions of Prototype.js and jQuery, vulnerable to known XSS and DOM injection attacks.
  • Web Application Testing with Burp Suite Pro
    • Intercepted requests to understand session handling, form submissions, and API structures.
    • Identified hidden endpoints through forced browsing and directory brute-force.
    • Created a sitemap and tree view of accessible routes and files.
  • Information Disclosure & Reconnaissance
    • Discovered exposed configuration files and asset metadata that revealed:
    • Software versions (e.g., jQuery 1.7.2, Prototype.js 1.6.1)
    • Error messages disclosing server-side technology (e.g., PHP warnings, stack traces)
    • Static HTML comment blocks containing deprecated admin links
  • Attack Vector Mapping
    • Mapped possible attack vectors, including
    • Outdated JS library exploitation
    • File path traversal possibilities
    • Potential for user enumeration via login response analysis

• Revealed the Application’s Real Exposure Surface: Provided full visibility into accessible and vulnerable system components.
• Identified Third-Party Library Weaknesses: Exposed outdated dependencies posing potential exploitation risks.
• Detected Risky Misconfigurations and Data Leakage: Enabled proactive remediation and reduced attack exposure.
• Strengthened Overall Security Posture: Validated system resilience against real-world black-box attack scenarios.