Spring Cloud AWS missing SNS message signature verification allows spoofing of HTTP/HTTPS endpoint notifications
Applications using Spring Cloud AWS SNS HTTP/HTTPS endpoint support (@NotificationMessageMapping, @NotificationSubscriptionMapping, @NotificationUnsubscribeConfirmationMapping) did not verify the signature of incoming SNS messages. An unauthenticated attacker who knows the endpoint URL could send crafted HTTP POST requests mimicking SNS Notification or SubscriptionConfirmation messages, causing the application to: Process arbitrary payloads as if they were legitimate SNS notifications. Auto-confirm subscriptions or unsubscribe from attacker-controlled topics. Affected versions: 3.0.0 through 3.4.2, 4.0.0, and 4.0.1. …