Penetration Testing - Simulating Real-World Attacks

About 2 min read

Penetration testing is a security testing method in which testers attempt to break into a system or network using the same techniques as real attackers, in order to discover and verify vulnerabilities. Also called a "pen test," its major advantage is the ability to uncover practical vulnerabilities that paper-based assessments cannot find. As of 2024, demand for penetration testing targeting cloud and container environments is rising sharply.

Real-World Use Cases

"During the annual penetration test, an authentication bypass in the internal VPN was discovered. Three individually low-risk misconfigurations combined to make it possible to break into the internal network from the outside. Based on the test report, we are working through the fixes in order of priority."

The Testing Process Flow

Test Types and Techniques

Black-box testing attempts attacks from the outside without any internal information about the system. White-box testing searches for vulnerabilities based on source code and design information. Gray-box testing falls in between, conducted with limited information. Diverse attack techniques such as password cracking, SQL injection, and XSS are included in the testing.penetration testing books on Amazon will help you learn these techniques.

Concrete Execution Scenarios

A common misconception is that "penetration testing is the same as vulnerability scanning." Whereas vulnerability scanning uses automated tools to detect known vulnerabilities, penetration testing has skilled testers combine multiple vulnerabilities to actually attempt a break-in. For example, even vulnerabilities that are low risk on their own can, when combined, lead to the takeover of administrator privileges. Test costs depend on scale, but for a web application the going rate is roughly 1 million to 5 million yen. The test produces concrete reports such as "30% of passwords were cracked within one hour," which helps prioritize security improvements.

Verifying Password Security

Penetration testing also verifies password strength. It demonstrates that weak passwords can be broken in a matter of minutes. Sufficiently long random passwords are confirmed to be difficult to break even in a penetration test.security assessment books (Amazon) are also helpful references.