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Penetration testing: Uncover hidden weaknesses in your security!

17.9. 2024 | 10 min read | author: Marek Malcovský

Are you sure your security measures are sufficient? Penetration testing simulates cyberattacks to identify vulnerabilities before real attackers can exploit them. Our concise summary will show you which testing approaches and methods can help ensure your protection is truly robust. Discover how penetration testing can enhance your security measures and safeguard your sensitive data.

Marek is an ethical hacker with a keen sense of detail. Throughout his career, he has uncovered vulnerabilities in several renowned software products and systems used by companies worldwide. At Axelum, his primary role involves identifying security vulnerabilities in complex systems, making him a key member of the Red Team.

Marek holds the prestigious Offensive Security Certified Professional (OSCP) certification in ethical hacking. Additionally, he developed the Perimeter Guard service, which actively protects our clients' perimeters.

What is Penetration Testing (PT)?

Penetration testing, often referred to as PT, is a process where an attack is simulated on a computer system, network, or application to identify vulnerabilities that real attackers might exploit. This process is carried out by specialists known as penetration testers or ethical hackers, whose main task is to uncover security weaknesses before cybercriminals find and exploit them.
Penetration testing typically focuses on software and network components, but its scope can be much broader. In some cases, it may also include physical security assessments, such as evaluating the effectiveness of measures like locks, security cameras, access control systems, and other physical barriers. The goal is to determine if there are gaps that an attacker could exploit to gain physical access to sensitive data or systems.

Forms PT

Penetration testing can be conducted in three ways, depending on the amount of information the penetration tester has before starting the test.

These approaches are typically referred to as black-box, grey-box, and white-box:
  • Black-box: In this scenario, the penetration tester has no prior knowledge of the target system, network, or application. Their task is to act as an external attacker who must identify and exploit vulnerabilities based on minimal information. This approach best simulates a situation where the attacker has no access to internal information.
  • Grey-box: Here, the penetration tester has partial information about the target system. They might have access to some user accounts, documentation, or other limited data. This approach simulates a scenario where the attacker has some knowledge of the internal workings of the system, such as insiders or external attackers who have acquired some internal information.
  • White-box: This approach involves full access to information about the system, including source code, network topologies, configuration files, and other detailed technical specifications. White-box testing allows the tester to thoroughly analyze and identify vulnerabilities based on complete knowledge of the system. This type of testing simulates a situation where the attacker has full information, which could be the case for an employee or another internal source with complete access to information.
The choice of the right type of penetration test typically depends on the type of attacker an organization wants to simulate. For example:
White-box testing is suitable for simulating an attack by an internal employee with full access to the system. Grey-box testing is used when it is assumed that the attacker has partial access or compromised information, which could be the case for an external attacker who has obtained some internal information. Black-box testing mimics a scenario where the attacker has no internal knowledge and represents an external threat, such as an anonymous hacker from outside.
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Manual vs. automated testing

Penetration testing can be conducted in several ways, with the most common approaches being automated and manual testing. Each of these approaches has its specific advantages and is suitable for different situations.

Automated Tests
Automated tests use specialized tools to quickly and efficiently identify common vulnerabilities. These tools can scan a system or network and look for known security flaws that have been previously recorded. Automated tests are ideal for regular monitoring of security status, rapid detection of common issues, and testing a large number of targets in a short time. However, because they are limited to predefined patterns and lists of vulnerabilities, they may overlook more complex or specific threats.
Manual Tests
Manual testing involves detailed analysis conducted by experienced experts who focus on identifying specific and more complex vulnerabilities that automated tools might miss. This approach allows testers to apply creativity, experience, and knowledge of specific contexts, which are crucial for uncovering less obvious security weaknesses. Manual tests are often necessary for testing new or unusual applications, investigating logical errors, human factor mistakes, or assessing security against new types of attacks.

How does Penetration Testing work?

Using standards in penetration testing

There are various standards that penetration testers can use when conducting tests, such as the OWASP Testing Guide. This guide provides a structured framework for application security testing and covers a wide range of attack types that should be tested. Similarly, other standards like NIST SP 800-115 or PTES (Penetration Testing Execution Standard) offer methodologies for performing penetration tests in various environments and cover not only applications but also networks, operating systems, and physical security measures.

However, it is important to understand that adherence to such standards does not automatically ensure high-quality testing. Standards like the OWASP Testing Guide define what types of attacks should be tested but do not specify the depth and quality of the tests. This means that two different penetration testers might conduct tests according to the same standard, but the resulting level of detail, depth, and quality of their work can vary significantly.

The true value of a penetration test depends not only on following certain standards but also on the experience, skills, and approach of the ethical hacker. Thorough and high-quality testing involves deeper analysis, creativity, and the ability to identify unusual vulnerabilities that might otherwise go undetected. Additionally, testing should be tailored to the specific needs and environment of the organization, which requires not only technical expertise but also an understanding of the broader context and risks associated with the given infrastructure.

Standards should serve as a minimum framework to follow, but the actual effectiveness of testing depends on the testers' ability to go beyond these standards.

Why should your company undergo penetration testing?

There are several key reasons why every company should regularly conduct penetration testing:


Protection of reputation and customer trust
A cyber attack can not only cause financial losses for your company but also seriously jeopardize its reputation. Customers and business partners expect their data to be protected by the highest security standards. Any security incident can lead to a significant decline in trust in your company, which can have long-term negative impacts on your business.


Furthermore, with the increasing frequency of supply chain attacks, it is crucial that both your systems and those of your suppliers are secure. Regular penetration testing can reveal vulnerabilities not only in your internal processes but also in the security of your suppliers, thereby protecting both your own data and the trust of your clients and business partners.

Compliance with legislative and regulatory requirements
Many industries require adherence to specific security standards and regulations, such as GDPR, ISO/IEC 27001, or PCI DSS. Penetration testing is often a key component of these standards and can help your company meet data protection requirements. Ensuring compliance with these standards not only helps you avoid fines but also legal consequences associated with non-compliance.


Cost optimization for security
Investing in penetration testing may seem costly, but compared to the potential losses caused by a cyber attack, it is an effective way to minimize financial risks. The costs associated with system recovery, compensating customers, or fines for regulatory non-compliance can far exceed the costs of regular security testing.

Conclusion

Penetration testing is an essential component of modern cybersecurity, helping organizations not only protect their systems and data but also ensure compliance with legal requirements and enhance trust with customers and business partners. While following standards is useful, the key factor remains the quality and depth of the tests performed. Companies should not approach penetration testing merely to meet regulatory requirements but should genuinely use the results of these tests to actively strengthen their security. Investing in thorough and high-quality testing pays off significantly in the form of better protection and risk mitigation.

Don't wait until it's too late! Contact us today and find out how our penetration testing can uncover vulnerabilities in your security!

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