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DoS attacks that took down big game sites abused Web’s time-sync protocol

by The Gurus
January 9, 2014
in Top 10 Stories
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Arstechnica – Miscreants who earlier this week took down servers for League of Legends, EA.com, and other online game services used a never-before-seen technique that vastly amplified the amount of junk traffic directed at denial-of-service targets.
Rather than directly flooding the targeted services with torrents of data, an attack group calling itself DERP Trolling sent much smaller-sized data requests to time-synchronization servers running theNetwork Time Protocol (NTP). By manipulating the requests to make them appear as if they originated from one of the gaming sites, the attackers were able to vastly amplify the firepower at their disposal. A spoofed request containing eight bytes will typically result in a 468-byte response to victim, an increase of more than 58 fold.
 

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