GitHub Engineering February 28th DDoS Incident Report skottler March 01, 2018 On Wednesday, February 28, 2018 GitHub.com was unavailable from 17:21 to 17:26 UTC and intermittently unavailable from 17:26 to 17:30 UTC due to a distributed denial-of-service (DDoS) attack. We understand how much you rely on GitHub and we know the availability of our service is of critical importance to our users. To note, at no point was the confidentiality or integrity of your data at risk. We are sorry for the impact of this incident and would like to describe the event, the efforts we’ve taken to drive availability, and how we aim to improve response and mitigation moving forward. Cloudflare described an amplification vector using memcached over UDP in their blog post this week, “Memcrashed - Major amplification attacks from UDP port 11211” . The attack works by abusing memcache...