Researchers from Radware reported that massive TCP SYN-ACK DDoS reflection attacks hit Amazon, SoftLayer and telecom infrastructure in the last month. An independent research found more than 4.8 million devices vulnerable to an average amplification factor of 112x and thousands of hosts that could be abused for amplification up to a factor of almost 80,000x, an amazing firepower for attackers. The attacks not only impacted the targeted networks, but also disrupted reflection networks across the world, creating a fallout of suspected SYN flood attacks by many businesses.”]
Source: https://securityaffairs.co/wordpress/93744/cyber-crime/wave-tcp-ddos-reflection-attacks.html