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Pentesting voIP
Boring stuffs
• allows you to make and receive telephone calls over the Internet
• low international phone call rates to other countries
• Protocols under voIP:
• SIP(UDP -5060)
• H.323
• RTP
• Skype
• SIP: Requests
• INVITE - establish connection
• BYE - terminate
• REGISTER – indicate client address to
server
• SIP: Responses
• 1xx - responses to requests
• 2xx: 200-level responses indicate a
successful completion of the request
• 3xx: redirection is needed for completion
of the request.
• 4xx: bad syntax
• 5xx: The server failed to fulfil an
apparently valid request
• 6xx: This is a global failure
Attacks on SIP
• Information gathering and foot printing
• Eavesdropping and capturing traffic
• VLAN hopping
• Spoofing Caller ID
• Identification of Denial of Service (DoS) vulnerabilities
• Authentication Attacks
Demo !!
VoIP Checklist for Penetration Testers
• VoIP-001 - VLAN hopping from data network to voice network
• VoIP-002 - Extension Enumeration & Number Harvesting
• VoIP-003 - Capturing SIP Authentication
• VoIP-004 - Eavesdropping Calls
• VoIP-005 - CallerID spoofing
• VoIP-006 - RTP injection
• VoIP-007 - Signaling Manipulation
• VoIP-008 - Identification of insecure services
• VoIP-009 - Testing for Default Credentials
• VoIP-010 - Application level vulnerabilities
• VoIP-011 - Voice Mail Attacks
• VoIP-012 - Phone Firmware Analysis

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Pentesting VoIP

  • 2. Boring stuffs • allows you to make and receive telephone calls over the Internet • low international phone call rates to other countries • Protocols under voIP: • SIP(UDP -5060) • H.323 • RTP • Skype
  • 3. • SIP: Requests • INVITE - establish connection • BYE - terminate • REGISTER – indicate client address to server • SIP: Responses • 1xx - responses to requests • 2xx: 200-level responses indicate a successful completion of the request • 3xx: redirection is needed for completion of the request. • 4xx: bad syntax • 5xx: The server failed to fulfil an apparently valid request • 6xx: This is a global failure
  • 4. Attacks on SIP • Information gathering and foot printing • Eavesdropping and capturing traffic • VLAN hopping • Spoofing Caller ID • Identification of Denial of Service (DoS) vulnerabilities • Authentication Attacks
  • 6. VoIP Checklist for Penetration Testers • VoIP-001 - VLAN hopping from data network to voice network • VoIP-002 - Extension Enumeration & Number Harvesting • VoIP-003 - Capturing SIP Authentication • VoIP-004 - Eavesdropping Calls • VoIP-005 - CallerID spoofing • VoIP-006 - RTP injection • VoIP-007 - Signaling Manipulation • VoIP-008 - Identification of insecure services • VoIP-009 - Testing for Default Credentials • VoIP-010 - Application level vulnerabilities • VoIP-011 - Voice Mail Attacks • VoIP-012 - Phone Firmware Analysis