What is PCI Penetration Testing and How it Works

For every lock, there is someone out there who is trying to pick up or break in. – David Bernstein

Yes, as the quote goes. We all check our home to see if it is locked twice before leaving. Do you ensure the same thing in maintaining your customer data? Yes, we are talking about the cardholder’s information.

Organizations that store, process, and handle credit cards and payment information need to be PCI DSS (Payment Card Industry Data Security Standards) compliant. Being PCI-compliant helps your organization protect itself from significant security threats and vulnerabilities and maintain cardholder information security.

To become PCI DSS compliant, you need to meet many technical requirements, and one such crucial requirement is PCI penetration testing. What is it, who needs to perform it, and how is it done? Let’s get into it.

What is PCI Penetration Testing

PCI (Payment card industry) penetration testing is performed to identify vulnerabilities and threats in the systems that process and store cardholder information. As per Payment Card Industry Data Security Standards (PCI DSS), you must perform PCI Pen testing regularly to maintain effective cardholder information security.

PCI pen testing aims to mimic the attackers’ activity in the card data environment (CDE) and identify and exploit the vulnerabilities that give unauthorized access to the cybercriminals to hack into the system.

Why is PCI Penetration Testing Important?

Credit card fraud is one of the most prevalent issues affecting millions of cardholders across the globe. When dealing with cardholder data, having a protective card environment should be at the top of the list considering security.

Within the PCI DSS requirements, 11.3.1 and 11.3.2, you are required to perform penetration testing at least once annually or after any significant changes in your systems (segmentation controls) to avoid problems such as 

• Non-compliance penalties
• Data breaches
• Financial and reputational damage

PCI pen tests help you identify your security gaps and vulnerabilities and enable you to act on them before bad actors and hackers exploit them. This is why it is crucial to perform regular pen tests from both security and compliance points of view.

Who Needs To Perform a PCI Penetration Test

As per the PCI DSS 11.3 requirements, the PCI Council specifies that a penetration test needs to be performed by a qualified internal resource or third-party professional. Also, the tester needs to be independent of the systems on which penetration tests will be performed. This means that they should not be involved in the setup, support, and management of the CDE systems.

There are guidelines specified for assessing the past experience of the pen tester. Below are some certifications mentioned in the guideline which may validate that professionals are qualified.

• Offensive Security Certified Professional (OSCP)
• Offensive Security Certified Expert (OSCE)
• Certified Ethical Hacker (CEH) – EC Council
• GIAC Exploit Research and Advanced Penetration Tester (GXPN)
• GIAC Certified Penetration Tester (GPEN)
• GIAC Web Application Penetration Tester (GWAPT)
• CREST Registered Penetration Tester

It is important to note that certifications alone are not enough and you need to follow other guidelines as well like looking at past experiences, projects, tests performed, and more while choosing the pen tester.

Also check out details on Penetration Testing for PCI DSS 4.0

How to perform PCI Penetration Testing?

A PCI DSS penetration test consists of 5 steps, each broken into three phases: pre-engagement, which involves the planning of scoping and information gathering; engagement, the evaluation process; and post-engagement, which involves reporting and retesting. Let us briefly elaborate on each step below.

1. Scoping

Before getting into the pen test, the scope (including details on objectives, assets, or environments that need to be tested) and the required approvals, are determined using PCI DSS requirements. This includes the entire CDE perimeter (both external and internal).

Any critical systems in the organization, like network connections, access points, and applications/servers that store, process, and transmit cardholder data come under the scope. All systems not connected with the CDE are considered out of scope for PCI penetration testing.

2. Reconnaissance & Discovery

Once the scope is defined, the pen tester will identify your network assets within the specified scope of the CDE. During this step, they try to gather information on the target through various reconnaissance techniques. 

Also, the tester will identify all the hosts in the target network and their services. This can be done using various techniques, such as banner grabbing, port scanning, and social engineering.

3. Exploitation & Evaluation

Using the scope and discovery, the penetration testing team now evaluates all your systems and applications for entry points and vulnerabilities. This is generally done using manual techniques and automated tools. 

The pen tester tries to exploit the identified vulnerabilities to gain access to the organization’s systems and cardholder data. Furthermore, they try to explore the CDE to identify additional attack vectors and evaluate the overall security parameters.

4. Reporting

After the evaluation, the pen testing team compiles a detailed report of the methodology utilized, the vulnerabilities discovered, the severity of each vulnerability, and the recommended remediation steps. 

Generally, a clear flow of the penetration testing steps to provide evidence is also mentioned in the report for the stakeholders. Based on the report, the relevant team addresses the identified vulnerabilities and implements the recommended remediation steps.

5. Retest

In the final phase, the company tests its systems again to ensure that it appropriately addresses the identified vulnerabilities and complies with the PCI DSS.

The pen test process is repeated regularly or whenever there is a change in your network or system infrastructure. This ensures that your previous pen testing efforts were effective and maintained the security of CDE in place.

Before we get to the top PCI penetration testing tools, let’s look at the difference between PCI pen testing and vulnerability scanning.

Also, find out what is the vulnerability disclosure policy

Difference Between PCI Penetration Testing and Vulnerability Scanning

Vulnerability scanning utilizes software applications for testing and identifying vulnerabilities in your network and applications. The scanner looks for known vulnerabilities in your software and reports those that need to be fixed.

While PCI penetration testing simulates an attack by hackers and identifies vulnerabilities in your network and applications. A pen tester uses manual and automated tools to identify and exploit vulnerabilities. Unlike vulnerability scanners, it also tests the security control of the organization, policies, and procedures with a comprehensive report. 

To sum up, both penetration testing and vulnerability scanning are essential for PCI compliance, and they have certain similarities. But penetration testing proves to be more efficient as it follows a more comprehensive approach to the organization’s security posture, while vulnerability scanning is targeted for testing specific vulnerabilities.

Tools to Perform PCI Pen Test

Let us look at the top three tools that will help you perform PCI penetration testing to become PCI compliant.

Acunetix

Acunetix is a powerful web vulnerability scanner and penetration testing tool that can perform checks automatically to identify over 4500+ vulnerabilities. The tool uses automated and manual testing techniques to identify security vulnerabilities. Acunetix is helpful for PCI penetration testing as it focuses on different website potential security risks such as SQL injection, cross-site scripting (XSS), and other web-based attacks.

Key Features

• Built-in PCI DSS vulnerability scanner
• Quick Scan and Full Scan options for regular penetration testing
• Team collaboration features for organized security management
• Seamless integration to connect with your existing cloud system
• Comprehensive reporting that highlights vulnerabilities and provides recommendations for remediation
  

Intruder

Intruder is a security testing tool that helps organizations identify and remediate potential security risks in their network infrastructure and web applications. The tool provides an easy-to-use interface that allows users to quickly and easily scan their assets for vulnerabilities. With manual testing features, testers can look for vulnerabilities that are not identified through Intruder’s automated scanning. It also has a separate PCI Compliance & Vulnerability Management module to meet the security requirements.

Key Features

• User-friendly dashboard to check PCI security controls
• Automated and manual penetration testing features
• Continuous scanning features to stay risk-free
• Integration with issue-tracking systems to efficiently manage risks
• Intelligent, audit-ready report generation

Nessus

Nessus is an industry-standard vulnerability assessment and penetration testing software that helps you automate PCI pen tests to look for basic and advanced vulnerabilities on both network and application levels. From software flaws and missing patches to malware and other vulnerabilities, Nessus identifies and reports different security issues to fix them. 

As the tool covers different endpoints, servers, and virtualization platforms, pen testers often prefer it to perform PCI tests.

Key Features

• Comprehensive vulnerability scanning (both automated and manual)
• Extensive library of plugins to keep up with the latest threats and vulnerabilities
• Compliance monitoring mode to meet PCI requirements
• Integration with other security and pen testing tools
• Remediation guidance to fix severe security issues

Conclusion

That’s a wrap. Penetration testing is a necessity these days, not just from PCI DSS compliance point of view but also to ensure that your customers’ data is safe from cybercriminals. A single cyber attack can prove to be devastating to the organization’s reputation.

So, it is always a smart move to have the necessary security checks ticked. In case you are wondering how to quickly secure your systems and strike all the requirements in the PCI checklist, feel free to talk to our PCI experts!

FAQs

1. Is penetration testing required for PCI?

Yes, penetration testing is required for companies that need to comply with PCI DSS as per PCI Requirement 11.3. You need to perform penetration tests regularly to protect customers’ sensitive data from cybercriminals.

2. When should PCI penetration testing be performed?

PCI Penetration testing should be performed at least once annually or after a significant upgrade or changes to the segmentation controls.

3. How can I get PCI DSS compliant?

To get PCI DSS compliant, you need to first understand the 12 requirements of PCI security standards. Then, conduct risk and gap assessments, complete relevant questionnaires and perform penetration tests. For a detailed guide, click here.

4. Which tool best complies with PCI DSS Requirement 11?

Sprinto is the perfect PCI compliance automation solution that runs fully automated security checks and reports all the crucial security issues from a compliance point of view.

5. What are PCI internal and external network vulnerability scans?

The external network vulnerability scan looks for security threats in the company’s network perimeter or websites/apps through which cybercriminals could compromise the network. The internal scan looks for security issues and vulnerabilities inside the company’s network.