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Patch Management Strategies

Cyber Security Mastery: From Zero to Hero

Closing Security Gaps

Patch Management is the process of acquiring, testing, and installing code changes (patches) to fix security vulnerabilities in software and operating systems.

Why Patching Fails (and Why It's Critical)

  • Many major breaches (e.g., Equifax, WannaCry) occurred because the exploited vulnerability had a patch available that the organization failed to install.
  • Patches must be applied quickly, as attackers reverse-engineer them to develop exploits rapidly.

Key Patch Management Steps

  1. Inventory: Know every device and application in your environment.
  2. Vulnerability Scanning: Identify missing patches (using tools like Nessus/OpenVAS, covered later).
  3. Testing: Apply patches in a non-production environment first to ensure they don't break mission-critical applications.
  4. Deployment: Deploy patches rapidly, prioritizing critical severity vulnerabilities.
  5. Verification: Confirm the patch was successfully applied and the vulnerability is closed.

Zero-Day Vulnerability: A vulnerability that is exploited by an attacker before the vendor has released a patch.