What is Patch Management
Security update installation process
Patch Management is a systematic process of discovering, testing, and installing software updates to address vulnerabilities.
Process Stages
- Asset and software inventory
- Monitoring available updates
- Assessing patch criticality
- Testing in staging environment
- Deployment planning
- Installation and verification
Types of Patches
- Critical — fix actively exploited vulnerabilities
- Security — close known holes
- Functional — fix bugs and add features
- Cumulative — combine multiple updates
Best Practices
- Automate the process where possible
- Regular vulnerability scanning
- Document all changes
- Rollback plans for issues
Tools
- WSUS, SCCM for Windows
- Ansible, Puppet, Chef for Linux
- Qualys, Nessus for scanning