Discovering the security flaws in your VoIP infrastructure to secure from external attacks

VoIP (Voice over Internet Protocol) has become important for businesses and hence a good option for the attacker to exploit whenever left unprotected. Unlike other IT infrastructure, VoIP is also subjected to risks like interception, caller ID spoofing, Denial of Service (DoS) etc.

VoIP security is not only about call encryption, it is the level of trust that's conveyed over the text and voice network. If it is compromised, it can become a huge threat by carrying out more attacks.

A VoIP security assessment is a manual assessment of the security of the VoIP infrastructure. It identifies the vulnerability in the VoIP system to reduce the risk of financial loss or unauthorized access.

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Securing a VoIP network is important for every organisation in a world full of uncertainties. Our team accesses the VoIP infrastructure to determine the risk of all the possible network infrastructure attacks. Evaluating the different VoIP components from the security perspective and capability to ensure they maintain confidentiality, integrity and availability. VoIP security assessment generally includes- 


1. Application-level vulnerabilities 

2. Extension enumeration and number harvesting 

3. Default credentials testing 

4. Voicemail security testing 

5. Traffic capture and eavesdropping

6. Caller ID spoofing 

7. Identifying DoS vulnerabilities 

8. Design and configuration issues 



How is VoIP security assessment performed?

The general approach is to gain access to the network and identify the vulnerabilities which are explained in the steps below - 


1. Information gathering - Gathering all the possible information about the IP of servers, VoIP devices, PSTN's signalling system etc. 


2. Enumeration - Gathering information about services running in the environment. 


3. Vulnerability analysis - Identifying the vulnerabilities in the devices, services and infrastructure. 


4. Attacking - Exploiting the vulnerabilities to gain access and accessing the scope of attacks


5. Report and Support - Presenting a detailed report on the vulnerabilities found with their strength, risk and standard associated with the security. Assisting in deploying the mitigation strategies as suggested in the assessment.  



It is important to resolve the flaws as early as possible as the slightest negligence can result in severe financial and property losses. Application of required regulations for every business using VoIP infrastructure. 


Are you still using unprotected VoIP services for your business? We can help in securing your VoIP infrastructure located anywhere in the world. Contact us via call or write an email and we will be there for assistance. 

Why VoIP Vulnerability Assessment & Penetration Testing?

Real Hacks

Identify vulnerabilities in your VoIP system with their impact

System Efficiency

Determining the current system efficiency

Potential Threats

Gain insight into the potential threats

Defence System

Defending against phishing and identity thefts

System Updates

Identify any installed application patches that need an update

What Illume Offers
  • 1. Complete internal and external risk assessment in VoIP and PSTN infrastructure.
    2. Addressing and evaluating the flaws present in the current system.
    3. A comprehensive report on the findings and remediation to fix the VoIP security issues.
    4. Supporting the internal team in resolving the reported concerns.
    5. Getting the system compliance and other regulations ready.

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A VoIP security assessment helps to identify any vulnerabilities in the VoIP system to reduce the risk of unauthorised access and ensure the system is not exposed to attack from the internet.
VoIP provides lots of benefits to an organisation but with that, there are certain security risks as well. These systems are an attractive target for unauthorised access.
VoIP Security assessment will help in identifying any vulnerabilities present in the system to reduce security and financial risks.
1. Application-level vulnerabilities
2. Extension Enumeration & Number Harvesting
3. Testing for Default Credentials
4. Voice Mail Attacks
5. Traffic Capture and Eavesdropping
6. Identify Denial of Service (DoS) Vulnerabilities
7. Caller ID Spoofing
8. Comprehend VoIP Configurations and Network Designs
1. Attacking VoIP authentication
2. SBC access
3. Identifying DoS vulnerabilities
4. Traffic capture and eavesdropping
5. Attacking SS7 components
6. Recreate Customer VoIP Implementations
7. Caller ID Spoofing
8. Physical Voice Port Access Checks
Illume Intelligence is a leading penetration testing organisation in India. Our experts focus on training and development for honing their security skills to provide the best security consulting available.
Our testing includes accessing the VoIP infra and determining the risks of internal attacks. We evaluate varied VoIP components from a security perspective and investigate authentication mechanisms, potential interception, interruption or manipulation of the exchanged information between the client and VoIP server.
VoIP Penetration Testing can be applied to various types of VoIP systems, including IP PBX (Private Branch Exchange) systems, SIP (Session Initiation Protocol) servers, VoIP gateways, softphones, VoIP phones, and VoIP-enabled applications.
The primary objectives include identifying security vulnerabilities such as misconfigured SIP settings, weak authentication mechanisms, insecure transport protocols, and vulnerabilities in VoIP devices and applications. Additionally, it aims to assess the effectiveness of security controls, validate compliance with security policies and standards, and provide recommendations for remediation.
While traditional network penetration testing focuses on testing network infrastructure and services, VoIP Penetration Testing specifically evaluates the security of VoIP protocols, devices, and applications. It involves techniques such as SIP enumeration, RTP (Real-time Transport Protocol) analysis, and VoIP-specific attack vectors.
Common tools include SIPVicious, VoIPHopper, Cain & Abel, Wireshark, Metasploit, and custom scripts developed for VoIP testing. Techniques may include SIP enumeration, SIP fuzzing, call interception, RTP manipulation, and SIP authentication bypass.
VoIP Penetration Testing helps organizations identify and remediate security vulnerabilities that could lead to non-compliance with regulatory requirements. By ensuring the security of VoIP systems, organizations can meet the security controls and guidelines specified by regulatory standards.
Yes, VoIP Penetration Testing services can be integrated with other security testing activities such as network penetration testing, web application testing, and mobile application testing. This provides a holistic approach to assessing an organization's overall security posture.
The ROI of VoIP Penetration Testing services includes reduced risk of security breaches and associated financial losses, compliance with regulatory requirements, enhanced reputation and brand trust, and cost savings through early detection and remediation of vulnerabilities. Additionally, it helps organizations avoid potential legal and regulatory penalties resulting from data breaches in VoIP systems.