How to Fix Vulnerabilities Found by SAST and DAST

Finding vulnerabilities through SAST (Static Application Security Testing) and DAST (Dynamic Application Security Testing) is the first critical step toward securing your application. But what comes next can be unclear.

You may be wondering:

• How do I fix these issues?
• What should I prioritize?
• What steps ensure lasting security?

Here’s a clear, step-by-step guide from TRIOTECH SYSTEMS, experts in application security services, to help you move from identifying vulnerabilities to fixing them effectively.

Step 1: Understand What You Found

Before taking action, get a clear understanding of the vulnerabilities uncovered:

• SAST Findings: Code-level issues such as insecure functions, weak encryption, and outdated libraries.
• DAST Findings: Runtime vulnerabilities like SQL injection, cross-site scripting (XSS), and unprotected API endpoints.

Knowing the difference will help you apply the right fixes.

Fixing SAST-Discovered Vulnerabilities

1. Prioritize the Issues

Not all vulnerabilities are equal. Focus first on:

• Critical Issues: Fix these immediately—they can expose sensitive data or compromise your entire system.
• Moderate/Low Risk: Plan fixes as part of regular development cycles.

Pro Tip: Use tools like Dependabot or Snyk to automate issue tracking and prioritization.

2. Apply Secure Coding Practices

• Use secure frameworks and libraries.
• Follow best coding practices like input validation and secure data handling.

Example: If SAST highlights unsafe input handling, implement proper validation and sanitization.

3. Patch and Update Libraries

• Update libraries and dependencies regularly.
• Ensure compatibility before applying updates.

Example: If SAST reports an outdated authentication library, update it to the latest version and test login functions afterward.

4. Automate Security in CI/CD Pipelines

• Integrate SAST scans into your CI/CD workflow.
• Block deployments if critical vulnerabilities are detected.

Example: Configure automated SAST scans during code pushes to catch issues early.

Fixing DAST-Discovered Vulnerabilities

1. Validate and Reproduce the Findings

• Reproduce issues in a staging environment to verify their impact.
• Conduct penetration tests to simulate real-world attacks.

Example: If DAST reports exposed session tokens, simulate unauthorized logins to test the vulnerability.

2. Harden Security Configurations

• Use HTTPS: Ensure secure communication.
• Strengthen Authentication: Enable multi-factor authentication (MFA).
• Configure Secure Cookies: Enable HttpOnly, Secure, and SameSite cookie attributes.

Example: After DAST flags weak session management, enable automatic session expiration and secure cookies.

3. Enable Real-Time Security Monitoring

• Deploy Web Application Firewalls (WAFs).
• Use an Intrusion Detection System (IDS) for continuous monitoring.

Example: If DAST reveals frequent brute-force login attempts, configure your WAF to block suspicious IPs.

4. Retest After Fixing

• Conduct regression testing using DAST tools to ensure the issues are resolved.
• Document all fixes and updates for future reference.

Example: After fixing an API vulnerability, run another DAST scan to confirm the issue is no longer present.

Secure Your Application with TRIOTECH SYSTEMS

Fixing vulnerabilities can be overwhelming, but you don’t have to do it alone. At TRIOTECH SYSTEMS, we specialize in comprehensive application security services, including expert SAST and DAST implementations tailored to your unique needs.

Contact Us Today!

Read Also:

Integrating SAST and DAST Tools with DevSecOps Pipelines

Advanced SAST & DAST: Leveraging AI and ML for Cybersecurity

Related reading: Best Risk Configurations