Patch management is the ongoing process of identifying, testing and applying software updates, known as patches, to operating systems, applications and device firmware. Patches fix security vulnerabilities and bugs, so applying them promptly reduces the opportunities available to attackers.
When a vendor discovers a flaw, it releases a patch and often publishes details of the weakness. Attackers study these announcements and race to exploit systems that have not yet been updated, which is why delay is risky. A patch management process maintains an inventory of devices, checks which updates are missing, tests important ones, deploys them in a controlled schedule and confirms that they installed. Management tools can automate much of this across many devices.
Retailers and hospitality venues have a wide mix of equipment, including POS terminals, back-office PCs, servers, routers, firewalls, payment devices and printers. Many sit in stores with no IT staff and operate during long trading hours, so updates need scheduling around opening times and often run remotely overnight. Patching of internet-facing systems and operating systems is a priority in the ASD's Essential Eight.
Pitfalls include forgetting network devices and firmware, running unsupported software that no longer receives patches, and applying updates without testing, which can disrupt a point-of-sale environment. Some specialised software needs vendor approval before updates. Keep an accurate asset list, set clear timeframes for critical fixes and keep a way to roll back if something goes wrong.
Consistent patching is one of the cheapest and most effective security measures available. RetailCare handles patching as part of its managed IT and cyber security services.