Facebook Notes allows users to include ![]()
tags, Facebook crawls the image from the external server and caches it. Facebook will only cache the image once, but the cache can be by-passed and the feature can be abused to cause a huge HTTP GET flood. The target server is observed to have massive http get flood. Thousands of get request are sent to a single server in a couple of seconds. Total number of facebook servers accessing in parallel is 100+ (100+)”]
Source: http://chr13.com/2014/04/20/using-facebook-notes-to-ddos-any-website/
