Firewall and distributed denial-of-service (DDoS) attack prevention mechanisms in Cloudflare can be circumvented by exploiting gaps in cross-tenant security controls, defeating the very purpose of these safeguards, it has emerged.
“Attackers can utilize their own Cloudflare accounts to abuse the per-design trust-relationship between Cloudflare and the customers’ websites, rendering the protection mechanism ineffective,” Certitude researcher Stefan Proksch said in a report published last week.
