Biggest DDoSes of all time generated by protocol 0-day in HTTP/2

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Enlarge (credit: Aurich Lawson / Getty) In August and September, threat actors unleashed the biggest distributed denial-of-service attacks in Internet history by exploiting a previously unknown vulnerability in a key technical protocol. Unlike other high-severity zero-days in recent years— Heartbleed or log4j, for example—which caused chaos from a torrent of indiscriminate exploits, the more recent attacks, dubbed HTTP/2 Rapid Reset, were barely noticeable to all but a select few engineers. HTTP2/Rapid Reset is a novel technique for waging DDoS, or distributed denial-of-service attacks, of an unprecedented magnitude. It wasn’t discovered until after it was already being exploited to deliver record-breaking [...]