How to Implement a Patch Management Program

With cyberattacks growing increasingly sophisticated, keeping systems patched and secured is more crucial than ever. However, managing patches across an enterprise can be complex and time-consuming.

Implementing an effective patch management program takes planning, resources, and the right tools. Here are the key steps for deploying a successful patching process in your organization.

While implementing a patch management program is crucial, it’s important to acknowledge the additional layer of protection cyber insurance provides in case vulnerabilities are exploited despite your best efforts. Contact us for more information.

What is Patch Management?

Patch management is the coordinated process for identifying, acquiring, testing, approving, deploying, and verifying software patches across endpoints and systems. These patches address vulnerabilities, bugs, and functionality improvements released by vendors.

Neglecting patches leaves systems susceptible to threats that can lead to data breaches, ransomware attacks, and more. With new vulnerabilities constantly emerging, patch management provides ongoing protection by closing security gaps.

Goals of Patch Management

An effective patch management program aims to achieve the following:

Minimize security risks by rapidly deploying critical patches
Reduce system downtime from vulnerabilities and malware
Maintain IT infrastructure health through routine updates
Ensure compliance with industry regulations
Create predictable routines for smooth patching workflows
Empower IT teams with controls to adjust patch deployment as needed
Maintain full visibility into patch status across all endpoints

With defined goals guiding your program, let’s explore the step-by-step process for implementation.

Inventory Hardware and Software Assets

The first step is developing a comprehensive inventory of all hardware and software assets across your environment. This inventory should include:

All endpoints: servers, desktops, laptops, virtual machines, mobile devices, etc.
Critical infrastructure: networking equipment, OT/IoT systems, etc.
All installed applications: operating systems, drivers, services, etc.

Discovery tools can automate inventorying of assets and tracking of software instances.

Make sure to keep your CMDB updated as assets get added or retired, and group related assets together for more efficient patching.

Prioritize Assets and Applications

With visibility into your IT inventory, prioritize assets and applications based on criticality:

Tier 1 assets: Business critical systems that support core operations. Patched first.
Tier 2 assets: Important but non-essential systems and user endpoints. Patched next.
Tier 3 assets: Legacy or deprecated systems. Patched last.

Likewise, prioritize software and applications used across assets:

Business critical apps: Software essential for business operations.
General productivity apps: Office suites, collaboration tools, email clients, etc.
Industry-specific apps: LOB applications specific to your vertical.
OS and drivers: Underlying OS, drivers, services, and firmware.

Categorizing assets and software facilitates risk analysis when assessing patches.

Establish Patch Testing Environments

Before deploying patches widely, thoroughly test them to avoid disruptions. Set up dedicated environments for testing:

Pre-production: Mirrors production environment for preliminary testing.
Quality assurance: Rigorous testing of system functionality post-patching.
Pilot groups: Controlled patch deployment to limited endpoints.

Test critical patches first in pre-production, then roll out to pilot groups before mass deployment. Monitor pilot systems closely. Schedule testing during maintenance windows.

Create Approval Workflows

Define workflows for patch testing, risk analysis, and approval involving multiple teams:

IT/security: Assesses vulnerabilities patched, criticality, and risk.
Operations: Evaluates impact on systems and business processes.
Change management: Facilitates tracking approvals and scheduling.
Legal/compliance: Ensures adherence to regulations.

Automate approvals based on risk thresholds and exemptions. Increase visibility through a patch knowledge base showing status through the process.

Deploy Patches Using Automation

Once approved, leverage automation for efficient, scalable deployment with reduced errors.

Key considerations:

Agent-based patching: Agents facilitate remote, automated patching across distributed endpoints.
Scheduling: Deploy off-hours and stagger groups to avoid disruptions.
Rollback: Automatically roll back failed patches with minimum downtime.
Orchestration: Coordinate patch deployment tooling through integration.

Automation frees IT staff from repetitive manual tasks for higher-value security work.

Continuously Monitor Patch Status

Ongoing monitoring ensures patches are successfully deployed and systems remain secure:

Dashboards: Centralized views of patch status across assets and software.
Alerting: Notifications for failed or missing patches needing remediation.
Reporting: Regular reports for stakeholders demonstrating program health.
Auditing: Review logs to verify patches were installed properly.

Monitoring and alerting enable prompt response to patch gaps before they can be exploited.

Regularly Assess Program Effectiveness

Continually assess your program’s effectiveness and identify areas for improvement:

Speed: How quickly critical patches are tested and deployed.
Coverage: Percentage of endpoints receiving patches.
Compliance: Adherence to policies and industry regulations.
Help desk tickets: Volume related to patching issues.
Vulnerabilities: Unpatched CVEs and exploitation risk.

Consider quarterly or biannual audits of program metrics and remediation needs.

Essential Patch Management Tools

Automating and streamlining patch management requires the right tools. Here are some of the most essential:

Patch management software: Automatically patch managed endpoints through predefined policies.
Vulnerability scanners: Discover unpatched CVEs across assets through network scans.
IT asset management: Maintains an updated inventory of assets and software needed for patching.
Change management: Enables tracking assets through testing and deployment workflows.
Monitoring and alerting: Notify on patching failures and vulnerabilities needing remediation.
Reporting and auditing: Provide visibility into program health for stakeholders.

Robust tooling minimizes the heavy lifting for IT staff while providing scalability.

Best Practices for Effective Patch Management

Beyond the implementation steps, adopting best practices helps boost the effectiveness of your program:

Maintain rigorous asset inventory hygiene with continuous discovery.
Prioritize patches addressing critical vulnerabilities for rapid deployment.
Integrate patching processes with change management workflows.
Test patches thoroughly in isolated environments first before deploying.
Stagger patch deployment across asset tiers to avoid widespread impact.
Automate patch deployment through policy-based tools whenever feasible.
Monitor endpoints proactively and respond promptly to failed patches.
Define KPIs and routinely audit program performance to drive improvement.
Provide patch status visibility and reporting to both IT and business leaders.

Patch management is an iterative, constantly evolving process. Regularly assess risks, keep tooling updated, and refine your program for best results.

Overcoming Patch Management Challenges

Despite best efforts, you’ll inevitably encounter challenges deploying your patch management program:

Legacy systems: Older hardware and custom apps may have compatibility issues or lack vendor support. Manage legacy systems separately.
Change resistance: Fear of downtime from botched patches may create organizational resistance. Gradually build trust through piloting and testing.
Limited resources: Patch management requires significant staff time and tools. Start small and make the business case for resources by quantifying risk reduction.
Remote endpoints: Offsite systems and mobile devices often fall outside patch management. Extend coverage through agents and policy configuration.
Complex environments: Managing patching across complex hybrid infrastructure with dependencies requires coordination. Integrate processes across teams.

Get a Free Risk Assessment

KSA partners Coalition offers a free cyber risk assessment, providing an overview of your risks and vulnerabilities. In addition to highlighting your vulnerabilities, the assessment includes a summary of recommended actions to help you mitigate your risk. Coalition also offers access to trained cybersecurity experts who can answer any questions you may have about the assessment or the recommendations you are provided.

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