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VoIP Infrastructure Penetration Testing

VoIP is a group of technologies and methodologies that enable the delivery of voice and multimedia content over enterprise local area networks or wide area networks. VoIP endpoints; They include dedicated desktop VoIP phones, softphone applications that run on PCs and mobile devices, and WebRTC-enabled browsers. It encapsulates the audio into data packets using VoIP codecs, transmits the packets over an IP network, and compresses the packets back into the audio at the other end of the connection. VoIP enables voice services to be delivered over broadband and private networks, enabling businesses to use a single voice and data network. VoIP also supports the resiliency of IP-based networks by enabling rapid failover following outages, redundant communications between endpoints and networks.


VoIP infrastructure, standards, and VoIP endpoints typically use Telecommunications Union (ITU) standard codecs, such as G.711, the standard for transmitting uncompressed packets, or G.729, the standard for compressed packets.


What is VoIP Penetration Testing?


Many companies have started to use the VoIP protocol to reduce costs and increase communication functionality, which brings the risk of attack on the corporate network. Detecting possible attack scenarios in advance and preventing vulnerabilities in these scenarios is critical for network security. VoIP infrastructure penetration tests provide a full understanding of the VoIP infrastructure security status and allow the detection of damage and risks that the attacker may cause to the system in the event of a possible attack.

As a result of the penetration tests carried out by our institution's experts; A comprehensive report is created containing information such as security vulnerabilities in the system, device information where security vulnerabilities are located, and solution suggestions for detected vulnerabilities. In this way, the necessary security measures are taken to ensure that the system is secured against possible attacks.



VoIP Penetration Testing Methodology

  • Establishing VLAN connection from data network to voice network
  • Expand numbering
  • Capture SIP authentication
  • listening calls
  • CallerID fraud
  • RTP injection
  • Signal management
  • Identifying unsafe services
  • Test default credentials
  • Application level vulnerabilities
  • Voicemail attacks
  • Phone firmware analysis

Frequently Asked Questions About VoIP Infrastructure Penetration Testing

Why Should I Perform VoIP Infrastructure Penetration Testing?

VoIP (Voice Over Internet Protocol) infrastructure, which enables internal units to communicate with each other within your systems, is a system that does not have sufficient protection against external and internal attacks. It has vulnerabilities that allow sophisticated attacks such as call tracking, call management, phone calls, and even unauthorized recording of calls. As a result of the VoIP Infrastructure Penetration Test performed by our expert team with their technical knowledge, you will understand VoIP configurations and network designs in general, you will be able to work on the security vulnerabilities determined by our team, and you will witness the minimization of the risks of the VoIP infrastructure in your system.

What are VoIP Attacks?

Attacks to VoIP infrastructure: Eavesdropping SIP Attacks SIP Hijacking Internet Spam Malware embedding Web Attacks Viproy (VoIP penetration test kit) SIPVicious -svmap -svwar -svcrack -svreport VoLTE Attacks Sniffing VoLTE interfaces open keys on GSM SIM User location manipulation Roaming information manipulation Side channel attack SiGploit (Telecom Beacon Exploitation Framework)

What Protocols Does VoIP Infrastructure Use?

The most used protocols in VoIP infrastructure: H.323: H.323 is a data on the IP standard offered by the International Telecommunication Union Standardization Sector (ITU-T). As you can see, this standardization body uses some letters to describe the scope based on the many criteria listed here: H: For audiovisual and multimedia systems G: For transmission systems and media S: T for switching and signaling: H for terminals for telematics services. 323 is one of the oldest packet-based communication systems protocols. Thus, this protocol is stable. The current version is v6. It is used by many vendors in many products such as Cisco call manager, NetMeeting and RadVision.H.323. Skinny Client Control Protocol: Skinny Call Control Protocol (SCCP), developed by Selsius, is a Cisco proprietary protocol. This communication uses the following different message types: 0001: RegisterMessage 0002: IPportMessage 0081: RegisterAckMessage RTP/RTCP: Real Time Protocol (RTP) is a transport protocol based on RFC 3550, specifically over UDP. Secure Real-Time Transport Protocol (SRTP): Secure Real-Time Transport Protocol (SRTP) is an application protocol based on RFC3711. SRTP offers advanced security features; Thus, it secures RTP through encryption using XOR operation with a keystream. H.248 and Media Gateway Control Protocol: Media Gateway Control Protocol (MGCP) is a protocol developed by Cisco. Session Initiation Protocol (SIP): Session Initiation Protocol (SIP) is a session management protocol based on the RFC 3261 protocol.