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VoIP Penetration Testing Service

Ensure that your VoIP infrastructure is protected against security threats with Enable Security’s VoIP penetration testing service.

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Why carry out VoIP Penetration testing?

Your VoIP environment and services, like all IP networks on the internet, are continuously being scoped by threat actors seeking to identify and exploit potential vulnerabilities. With Enable Security, you can expect:

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Financial loss prevention

VoIP systems are vulnerable to toll fraud and DoS attacks. We help prevent these attacks.
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Reputation management

DoS attacks and system breaches harm reputation, whether from stolen data or exploited VoIP systems.
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Specialized security guidance

Security audits by VoIP security testing professionals ensure that you can protect your business from emerging threats.
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Regulatory compliance

Penetration testing exposes VoIP vulnerabilities, preventing data leaks and ensuring compliance with regulations.

Testing your VoIP environment

Working with Enable Security, you will benefit from proven pentest techniques and proprietary tools to identify security vulnerabilities in your VoIP infrastructure. With a detailed analysis report in hand, you’ll know exactly what specific security threats require your attention and get actionable recommendations to secure your system.

Regular VoIP penetration testing reveals potential vulnerabilities in your network before attackers can exploit them. Our comprehensive security audits analyze VoIP server configurations and identify emerging threats, helping you stay ahead of malicious actors who continuously discover new attack vectors.

With our VoIP penetration testing services, you’ll benefit from decades of expertise in testing, analyzing, and identifying ways to secure your VoIP system against potential threats.

Our Methodology

Our team at Enable Security makes use of mature methodologies to detect vulnerabilities in your VoIP infrastructure before attackers can exploit them.

We begin our process with preliminary discussions to understand your network architecture, define the project scope, and establish a testing schedule. This ensures we fully understand your requirements and provide a tailored solution that meets your needs.

During the VoIP penetration test itself, our team sets up a testing environment, explores your system’s features and functionality, and performs security tests specific to each feature or component.

Apart from simulating real-world attack scenarios, we also conduct fuzzing exercises to identify vulnerabilities that are easy to miss. If within scope, we also simulate DDoS attacks using custom-built scenarios to test your defenses.

Some of our standard security tests include:

Authentication

  1. SIP authentication tests
  2. Digest leak tests
  3. SIP injection
  4. Open proxy tests
  5. SIP TLS version security checks
  6. Cipher-Suite security analysis
  7. Show 3 more

Media and RTP security tests

  1. RTP injection
  2. RTP bleed
  3. RTP flooding
  4. RTP packet fuzzing
  5. Codec fuzzing
  6. SDES Crypto-Suite analysis
  7. DTLS certificate analysis
  8. Codec enumeration
  9. Show 5 more

Resilience testing

  1. SIP black box fuzzing
  2. SIP denial of service testing
  3. API flooding
  4. RTP packet fuzzing
  5. Codec fuzzing
  6. Show 2 more

Enumeration

  1. SIP method enumeration
  2. SIP extension enumeration
  3. Codec enumeration

After the pentest, we provide a comprehensive technical report that details our findings and recommendations. We also offer an executive summary to help non-technical stakeholders understand the results. Our team is always available for follow-up calls to discuss the report and provide guidance on implementing solutions.

To ensure you’re protected in the long term, we offer a generous retest period. During this time, our team will verify that security fixes are effective and provide access to our Continuous Security Testing platform with self-serving tests specific to your system. You can then opt to subscribe to this service after the trial period.

Why work with us?

EXPERIENCE

The team at Enable Security is among the most experienced operators in the specialized field of VoIP penetration testing.

METHODOLOGY AND TOOLS

We use custom-built tools and methodologies, tailored to your specific infrastructure. We don’t believe in “one-size-fits-all” solutions.

Clear Communication

We translate complex technical findings into actionable insights, ensuring you understand the risks and how to address them effectively.

BRING IT ON

We love tough challenges. Complex problems bring out our best. We combine technical expertise with unwavering determination to exceed expectations.

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What is VoIP Penetration Testing?

VoIP penetration testing is a type of security assessment that simulates VoIP system attacks to identify potential system weaknesses or vulnerabilities.

It also includes assessing all VoIP network devices or applications, such as IP phones, phone provisioning servers, media servers/proxies, and mobile/desktop softphones.

Since SIP (Session Initiation Protocol) is a plaintext protocol, it’s best practice for encryption protocols to be used to ensure secure communication. Most often, SIP over Transport Layer Security (SIP-TLS) is used for signaling, and Secure Real-Time Protocol (SRTP) is used for media.

While it’s well-known that the Session Initiation Protocol (SIP) typically operates on port 5060 or 5061 for SIP-TLS, it’s surprisingly common to overlook the broader implications of general VoIP network traffic on related services. A crucial consideration is the network’s open ports, which may be utilized by various servers, such as:

  • Web servers handling VoIP phone provisioning
  • SIP server administration interfaces
  • Application servers managing access controls for users or VoIP IP phones.

By neglecting this holistic approach to security, organizations risk leaving themselves vulnerable to potential attacks and compromising their overall VoIP infrastructure.

What are the most common VoIP vulnerabilities?

Since SIP is one of the most commonly used VoIP protocols, it is no surprise it reigns in the top 10 VoIP vulnerabilities we see.

Threat actors often detect active SIP server IP addresses using a SIP OPTIONS request. After their target VoIP servers have been identified, they then send malicious VoIP traffic. The most common vulnerabilities we see are:

  1. SIP Flood denial of service attacks. This mainly takes the form of a brute force attack with REGISTER requests since this usually involves backend database requests.
  2. Caller-ID spoofing, leading to calls from fake phone numbers. This is commonly used for Vishing (VoIP phishing scams).
  3. Man-in-the-middle vulnerabilities leading to call interception/eavesdropping and/or toll fraud.
  4. Authentication bypass or weak passwords/authentication. This commonly leads to toll fraud/service theft.
  5. RTP traffic-related attacks like RTP Bleed and RTP Inject, leading to call audio spamming and/or call interception.
  6. Server crashes due to specially crafted SIP or RTP packets leading to Denial of Service (DoS).
  7. SIP header smuggling, leading to toll fraud/service theft and various other abuses.
  8. SIP injection, leading to data leakage and various other abuses.
  9. SIP Digest leak leading to toll fraud.
  10. In-dialog SIP messages can be used for amplification attacks against other VoIP systems.

Discuss your VoIP Penetration test requirements with us

Interested to find out more about our VoIP penetration testing services?
Contact us to schedule an obligation-free call.

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