Dynamic Application Security Testing (DAST)
1. Introduction
Dynamic Application Security Testing (DAST) is a security testing methodology that analyzes an application while it is running. Unlike Static Application Security Testing (SAST), which examines the source code, DAST simulates attacks on a live application and identifies vulnerabilities in real-time.
2. Key Concepts
2.1 Definitions
- Dynamic Testing: Testing an application in its running state.
- Vulnerability: A weakness in the application that can be exploited.
- Threat: Any potential danger that could exploit a vulnerability.
3. DAST Process
3.1 Step-by-Step Process
- Set up the testing environment with the application running.
- Define the scope of the test (what parts of the application to test).
- Select the appropriate DAST tool (e.g., OWASP ZAP, Burp Suite).
- Run the DAST tool against the application.
- Analyze the results for vulnerabilities.
- Document the findings and suggest remediation measures.
4. Best Practices
4.1 Tips for Effective DAST
Always perform DAST in a controlled environment to avoid unintended impact on production.
- Integrate DAST into your CI/CD pipeline.
- Prioritize vulnerabilities based on severity.
- Regularly update DAST tools to cover new vulnerabilities.
- Combine DAST with other security testing methods for comprehensive coverage.
5. FAQ
What is the main difference between DAST and SAST?
DAST tests applications while they are running, focusing on runtime vulnerabilities, whereas SAST analyzes the source code without executing it.
Can DAST find all types of vulnerabilities?
No, DAST is effective for runtime vulnerabilities but may miss issues that can only be detected in the code, such as logic flaws.
How often should DAST be performed?
DAST should be performed regularly, ideally with every build in a CI/CD pipeline, to ensure ongoing security.