White, black, gray, or crystal? Unpacking pentests.

White, black, gray, or crystal? Unpacking pentests.

We often hear about different types of penetration tests, however, it's still not clear how they are different and beneficial. In this article, you can find all these answers and comparison tables.

There are several different types of pen testing, each with their own set of benefits and drawbacks. In this article, we'll take a look at four of the most common types of pen testing from a hacker's standpoint: white box, black box, gray box, and crystal box testing.

The differences between white box, black box, gray box, and crystal box penetration testing in terms of the level of access and knowledge of the tester and the organization's systems.

White box testing

White box testing, also known as clear box or open box testing, is a type of penetration testing where the tester has full knowledge and access to the system and its configuration details. The tester has access to the system's source code, network diagrams, and administrator-level access to the systems. In this type of testing, the tester simulates an internal attack and uses their knowledge of the system to identify vulnerabilities and weaknesses.

Black box testing

Black box testing is a type of penetration testing where the tester has little to no knowledge of the system and its configuration details. The tester simulates an external attack and uses tools and techniques to try to gain unauthorized access to the system. This type of testing is used to identify vulnerabilities and weaknesses from the perspective of an external attacker.

Gray box testing

Gray box testing is a combination of white box and black box testing. The tester has some knowledge and access to the system, but not as much as in white box testing. The tester simulates an internal attack, but also uses tools and techniques to try to gain unauthorized access to the system. This type of testing is used to identify vulnerabilities and weaknesses from both an internal and external perspective.

Crystal box testing

Crystal box testing is a type of white box testing in which the tester is provided with access to the full source code and documentation, as well as being given in-depth knowledge of the application, servers, and infrastructure. This allows the tester to perform a very deep and detailed test.

In all types of penetration testing, testers use a variety of tools and techniques such as vulnerability scanners, exploit frameworks, and manual testing methods to identify and exploit vulnerabilities in the system. Once vulnerabilities are identified, the tester will document the findings and provide a detailed report to the organization outlining the vulnerabilities, their potential impact, and recommendations for remediation.

Penetration Testing Types Comparison Table

Testing Type

Tester's Knowledge and Access

Testing Perspective

Tools & Techniques

White Box

Full Knowledge & Access

Internal

Vulnerability Scanners, Source Code Auditing, Manual Testing

Black Box

Limited Knowledge & Access

External

Port Scanners, Vulnerability Scanners, Social Engineering

Gray Box

Partial Knowledge & Access

Internal & External

Vulnerability Scanners, Port Scanners, Social Engineering

Crystal Box

Full Knowledge & Access

Internal

Vulnerability Scanners, Source Code Auditing, Manual Testing, Reverse Engineering

It's important to keep in mind that this table is meant to provide a general overview, and in practice, different types of testing may involve multiple tools and techniques, as well as custom scripts and manual testing methods. Additionally, it's important to note that these examples are only focused on the technical aspect of penetration testing and do not take into account other important aspects such as legal and ethical considerations, communication, and coordination with the organization, and compliance requirements.

Comparison of Penetration Test from the Business Standpoint

Here we provide a comparison table for business owners including costs, time, values, compliance, and other criteria

Testing Type

Cost

Time

Value

Compliance

Other Criteria

White Box

High

Long

High

High

In-depth, internal perspective, access to source code

Black Box

Medium

Medium

Medium

Medium

External perspective, mimics real-world attacks

Gray Box

Medium

Medium

High

High

Combines internal and external perspectives, mimics real-world attacks

Crystal Box

High

Long

High

High

In-depth, internal perspective, access to source code and documentation

Improtant Notice

Penetration testing should be tailored to the specific needs of the organization. The scope, objectives and testing methods should be aligned with the organization's overall risk management strategy, business objectives, and compliance requirements. A penetration testing strategy should be developed in consultation with all stakeholders, including IT, security, and business teams, and should be reviewed and updated regularly.

It's important for organizations to understand that penetration testing is not a one-time event and the results of the testing should be used to continuously improve the overall security posture of the organization. The results should be analyzed, and vulnerabilities should be prioritized based on their criticality and the likelihood of them being exploited. A plan should be developed to address the identified vulnerabilities, and the remediation process should be tracked to ensure that the vulnerabilities are addressed in a timely manner.

Conclusion

In conclusion, penetration testing is a powerful tool that can help organizations identify vulnerabilities and improve their overall security posture. It's important to choose the right type of testing, methodology, and approach, use the right tools and techniques, consider legal and ethical implications, have proper communication and coordination within the organization, budget for the process and use a qualified and experienced team. Additionally, conducting regular testing, having a clear scope and objectives, having a plan in place to handle identified vulnerabilities, incorporating it into the overall risk management process, following a strict code of conduct for the pen-tester, being aware of the laws and regulations related to penetration testing, dual testing and automation, supply chain penetration testing, standard set of tools, methodologies and guidelines, and continuous improvement approach will provide a comprehensive and accurate results and improve the overall security posture of the organization.

If you are interested in a penetration test of any kind, you can start with the following questionnaire: https://forms.gle/zjiHSRwmxXdAphXj6

Thank you for reading!