Security researcher Chaman Thapa, also known as chr13, discovered a vulnerability in thesection Notes of the popular social network Facebook that couldexploited by anyone to launch the distributed denial-of-service (DDoS) attack of more than 800 Mbps Bandwidth on any website. Each note created by anyone on the Facebook platform an attacker could automatically generate malicious traffic against a target. Facebook will only cache the image once however using random get parameters the cache can be abused to cause a huge HTTP GET flood.”]
Source: https://securityaffairs.co/wordpress/24359/cyber-crime/use-facebook-ddos-attack.html