Full Definition
What is Patch Management?
Patch Management is the process of managing software updates that address security vulnerabilities, fix bugs, or improve functionality. It's a critical security practice that helps protect systems from known exploits.
Patch Management Lifecycle
1. Discovery
- Inventory systems
- Identify software
- Track versions
2. Assessment
- Review available patches
- Assess applicability
- Prioritize by risk
3. Testing
- Test in non-production
- Verify functionality
- Check compatibility
4. Deployment
- Schedule rollout
- Apply patches
- Phased approach
5. Verification
- Confirm installation
- Test functionality
- Update inventory
Prioritization Factors
| Factor | Consideration |
|---|---|
| CVSS Score | Vulnerability severity |
| Exploit Status | Active exploitation? |
| Asset Criticality | Business impact |
| Exposure | Internet-facing? |
Patch Types
Security Patches Fix vulnerabilities. Highest priority.
Bug Fixes Correct functionality issues.
Feature Updates New capabilities.
Cumulative Updates Bundle of patches.
Best Practices
- Regular patch cycles
- Automated where possible
- Test before production
- Maintain rollback capability
- Track compliance metrics
Challenges
- Legacy systems
- Downtime requirements
- Testing resources
- Third-party software
- Emergency patches