Outages can disrupt security tools and critical services, showing how failures in infrastructure, vendors, or recovery plans affect cyber resilience.
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Background for this topic.
Outage is a period when a system, network, application, or online service is unavailable or cannot perform its intended function. It may be planned maintenance or an unplanned disruption caused by equipment or software failure, misconfiguration, a dependency problem, natural hazards, or a denial-of-service attack. The tag generally concerns availability incidents, not every performance issue or security breach.
For security practitioners, an outage requires determining whether malicious activity contributed to the disruption while preserving relevant logs, network telemetry, and system state for investigation. Defenses include capacity planning, segmented and redundant architecture, tested failover and recovery procedures, and controls that limit the effect of DDoS traffic or compromised dependencies. Emergency changes made during recovery should be authorized and recorded, since they can create new vulnerabilities or affect data integrity. Clear incident ownership and communications help coordinate technical response without obscuring the cause or scope.
Two massive technical outages over the past year underscore the need for cybersecurity teams to consider how to recover safely from disruptions without creating new security risks.
Azure Outage Comes a Week After a Cloud DNS Error Disrupted AWS UsersMicrosoft's Azure cloud and 365 systems suffered an outage at noon on Wednesday because of a configuration error - hours before its quarterly earnings call and about a week after rival AWS underwent a widespread outage that shut down applications and services for most of the day.
Add-On EMV Features Put Merchants at Risk to High-Charging 'Free Lunch' CrooksVariations in how EMV ecosystem players implement the standard, as well as a bevy of features they've bolted on - transit modes, offline payment restrictions - have been "overloading" the specification and introducing exploitable vulnerabilities, warn a team of researchers.
Microsoft is investigating an ongoing DNS outage affecting customers worldwide, preventing them from logging into company networks and accessing Microsoft Azure and Microsoft 365 services. [...]