Context: Recently, a major global IT outage occurred due to a faulty software update from cybersecurity firm CrowdStrike. This update affected Windows computers running CrowdStrike's software, causing widespread disruptions across various sectors, including airlines, hospitals, banks, and government agencies.
Microsoft's Global Outage Explained
- The Indian Computer Emergency Response Team (CERT-In) issued a severity rating of “critical” for the incident.
Major Highlights:
- A glitch in the software update of Falcon Sensor (the endpoint protection programme of CrowdStrike) caused the Windows operating system to crash and several users faced with the Blue Screen of Death (BSOD). Once BSOD flashed on a user’s screen, they were not able to access their devices linked to CrowdStrike’s Falcon platform.
- BSOD is a warning that users see on their computer when the system interrupts operations and displays it on a blue screen. Officially referred to as the “Stop Error”, the warning is issued when a critical problem forces Windows to reboot.
- Blue Screen errors, also known as black screen errors or STOP code errors, can occur when a critical issue forces Windows to unexpectedly shut down or restart.
- One may encounter a message stating, "Windows has been shut down to prevent damage to your computer". These errors can stem from hardware or software problems.
- CrowdStrike is a cybersecurity firm that provides antivirus software to Microsoft for its Windows devices.
- Impact: Widespread disruptions to airlines, hospitals, banking and retail services, healthcare services, stock exchanges, and other digital services worldwide.
- Current status: CrowdStrike has identified the issue, rolled back the software update, and provided a manual fix and the situation has returned to normal.