Dynamic Application Security Testing, or DAST, is a technique that analyzes a running application to identify potential security vulnerabilities. Unlike SAST, which examines the source code, DAST focuses on the application’s behavior and interactions. This makes it particularly effective in detecting issues that may only arise during runtime.
For mobile developers, DAST offers several benefits. First, it helps identify security flaws that could be exploited by attackers. Second, it provides insights into how the app behaves in real-world scenarios. Finally, it complements other security measures, such as SAST, to provide comprehensive coverage.
This blog post will guide you through the essential best practices for integrating DAST into your mobile development process. We’ll explore how to combine DAST with Static Application Security Testing (SAST), the importance of continuous testing, and the significance of contextual analysis. By the end of this post, you’ll have a solid foundation for enhancing your mobile app’s security posture.
Integrating DAST and SAST for Complete Protection
To achieve the highest level of security, it’s crucial to integrate both DAST and SAST into your development lifecycle. Each method has its strengths, and together, they offer a robust defense against potential threats.
Using SAST in the Initial Coding Phase
Start by incorporating SAST during the initial coding phase. SAST tools analyze the source code for vulnerabilities, allowing developers to address issues early in the development process. This proactive approach helps prevent security flaws from becoming embedded in the codebase.
Applying DAST During CI/CD Processes
Once the application is in a runnable state, introduce DAST into your Continuous Integration/Continuous Deployment (CI/CD) processes. DAST tools simulate real-world attacks on the live application, identifying vulnerabilities that may not be apparent in the source code alone. This dual approach ensures that both static and dynamic aspects of the app are thoroughly tested.
Regularly Schedule Combined Tests
To maintain a secure application, schedule regular combined tests using both DAST and SAST. Continuous testing allows you to monitor and improve the app’s security posture over time, catching new vulnerabilities as they arise.
Continuous Testing for Ongoing Security
Security is not a one-time task; it’s an ongoing process. Implementing continuous testing strategies ensures that your app remains secure throughout its lifecycle.
Automated Testing in Your Workflow
Incorporate automated testing into your development workflow. Automated DAST tools can run tests at predefined intervals or trigger them based on specific events, such as code commits or deployments. This automation reduces the chances of human error and ensures consistent security checks.
Monitoring for Emerging Threats
Stay vigilant by monitoring for emerging threats and vulnerabilities. Cybersecurity is an ever-evolving field, and new attack vectors are constantly being discovered. Regularly updating your DAST tools and testing methodologies will help you stay ahead of potential threats.
Addressing Vulnerabilities Promptly
When DAST identifies vulnerabilities, prioritize addressing them promptly. Delaying remediation can leave your app exposed to attacks. Implementing a streamlined process for fixing security issues ensures that your app remains secure and reliable.
Contextual Analysis for Targeted Security
Understanding the specific requirements of your mobile application is essential for effective security testing. Contextual analysis allows you to tailor your DAST efforts to address the most relevant vulnerabilities.
Identifying Key Functionalities
Start by identifying the key functionalities of your app. Determine which features and data are most critical to its operation. This focus helps you allocate resources and attention to the areas that matter most.
Assessing Data Sensitivity
Evaluate the sensitivity of the data your app handles. For instance, apps that process financial information or personal data require more stringent security measures. Contextual analysis ensures that your DAST efforts align with the level of sensitivity and risk.
Customizing DAST Scans
Customize your DAST scans to target specific vulnerabilities based on your app’s context. Generic scans may overlook unique issues relevant to your application. Tailored scans increase the likelihood of detecting critical vulnerabilities.
Both DAST and SAST have their place in a mobile developer’s toolbox for ensuring application security. The choice between them depends on the development stage, the application’s nature, and the specific security concerns at hand.
For more on DAST, read my previous blogs Integrating DAST in the Development Cycle and Dynamic Application Security Testing vs. Static Application Security Testing.
