What Is Pentest? Why Is Penetration Testing Necessary?

With the rapid advancement of technology and the internet, businesses are facing numerous information security risks. Alongside this, protecting data also requires more effective preventive and management measures to ensure the security of critical information, preventing risks of loss and unauthorized access. Currently, one of the leading methods to ensure security is penetration testing, also known as Pentest. So, what is Pentest and why is it necessary to perform Pentest? Let's explore in more detail with Vcloudia in the article below.

What Is Pentest?

Pentest, short for “Penetration Testing,” is the process of evaluating the security of a system, application, or network by simulating attacks from external or internal sources. The goal of Pentest is to identify security vulnerabilities that can be exploited, thereby proposing remediation measures to ensure system safety against potential threats. Through Pentest, organizations can identify system weaknesses before malicious actors can find and exploit them. In particular, Pentest not only helps evaluate a system's resilience against attacks, but also enhances a business's readiness and response to cybersecurity incidents.

Pentest can be performed on computer systems, web apps, mobile apps, network infrastructure, IoT, cloud applications and infrastructure, SaaS software services, APIs, source code, or any IT asset connected to the internet that is susceptible to attack… However, the most common remain web app and mobile app pentesting.

Why Is It Necessary to Perform Pentest?

According to market research firm Market Watch, the Pentest market size in 2018 was 920 million USD, projected to increase to 2,420 million USD by 2025 at a compound growth rate of 14.9%. Therefore, the demand for testing system resilience against cybercriminals is massive. This is driven by digital economy business models requiring outreach – connection – communication – customer care via websites and mobile applications. In addition, businesses are also striving to “digitize” business models, deploying ERP to manage operations, CRM to store customer information and provide service, IoT devices in operations, etc. If not properly secured, all of these digital products can become victims of cybercrime.

Currently, cyberattacks are becoming increasingly sophisticated and complex, posing substantial risks to enterprise IT systems. Performing a Pentest brings many critical benefits, including:

- Preventing security risks: Pentest enables businesses to detect vulnerabilities early and remediate them before they can be exploited, minimizing the risk of data loss as well as reducing damage caused by security incidents and protecting brand reputation.

- Complying with regulatory standards: Many security regulations such as PCI DSS (for the payment card industry) and GDPR (for personal data protection in Europe) mandate organizations to undergo periodic penetration testing. In this regard, Pentest helps businesses meet these standards and avoid regulatory fines.

- Protecting critical data: Pentest aims not only to protect customer information but also to safeguard intellectual property and critical enterprise data from unauthorized access. Therefore, this is an essential step to ensure that sensitive data is kept safe and secure.

Classification of Pentest

When conducting penetration testing, no single method fits every scenario because each organization faces distinct conditions, risks, and adversaries. Therefore, a variety of testing types are currently designed to address specific enterprise objectives and threats. Below are the common types of penetration testing:

- Internal testing: Evaluates internal systems to determine the ability of an attacker to move within the network. This process includes system identification, enumeration, vulnerability detection, exploitation, lateral movement, and reaching target objectives.

- External testing: Evaluates internet-facing systems to identify vulnerabilities that could lead to data leaks or unauthorized access from the outside. This workflow encompasses identification, enumeration, vulnerability detection, and exploitation.

- Web application testing: Divided into three phases: reconnaissance (gathering information on operating systems, services, and resources), vulnerability discovery, and exploitation to access sensitive data.

- Insider threat testing: Detects weaknesses that could expose internal information. In this type, the assessment process focuses on flaws such as de-authentication attacks, misconfigurations, session reuse, and unauthorized wireless devices.

- Wireless testing: Evaluates vulnerabilities associated with wireless networks, including flaws such as deauth attacks, misconfigurations, session reuse, or rogue wireless devices.

- Physical testing: Focuses on vulnerabilities related to the physical security of data facilities and infrastructure. Factors such as social engineering attacks, tailgating, badge cloning, and other physical security risks are thoroughly assessed.

Phases of Pentest Execution

A professional and effective Pentest process typically encompasses the following phases:

- Planning and preparation: This is the initial step, defining the scope, objectives, and testing methodology for the Pentest. This step includes clear communication between the pentester and the organization regarding authorization, specific targets, and technical requirements.

- Information gathering: In this phase, the pentester conducts reconnaissance and compiles intelligence on the target system. This information includes system architecture, lists of active services, and deployed devices, thereby formulating an appropriate attack strategy.

- Penetration and exploitation: The pentester executes simulated attacks to exploit identified security vulnerabilities, utilizing tools and techniques to attempt to circumvent system defensive layers.

- Analysis and reporting: Upon completing testing, the pentester analyzes the results and delivers a detailed security vulnerability report. The report includes vulnerability descriptions, severity levels, and specific remediation plans for each issue.

- Remediation and re-testing: After receiving the report, the enterprise proceeds to remediate the vulnerabilities and conducts re-testing to ensure that the security measures have been effectively implemented.

When Should Pentest Be Performed?

Organizations are recommended to perform pentests periodically on an annual or quarterly basis to maintain security across their IT systems, including network infrastructure and applications. Alongside routine pentesting deployments, penetration testing is essential whenever an enterprise:

- Deploys or updates new systems: Whenever a new system or application is launched, businesses should perform a Pentest to ensure they are free of vulnerabilities from day one.

- Detects vulnerabilities or security incidents: When a system encounters an incident, conducting a follow-up Pentest helps evaluate whether remediation measures have been effective and verify if any new vulnerabilities have emerged.

- Needs to comply with security standards: To comply with standards such as PCI DSS, ISO 27001, or client and partner mandates, many businesses must conduct regular Pentests to ensure systems consistently meet security requirements.

Conclusion

Penetration testing (Pentest) is a vital component of security strategies for modern organizations, especially in the context of escalating cyber threats. Pentest not only helps discover hidden security vulnerabilities but also contributes to elevating system readiness against cyberattacks. Given its exceptional security advantages, Pentest is an operational practice that every enterprise should consider executing on a regular basis.