Smurf Amplification in 2026: Pre-Auth ICMP Reflection via L2 Broadcast
CVE-1999-0513 is 27 years old. The mechanism is alive. A 2026 enterprise wireless controller with no uRPF, no directed broadcast filtering, and an ICMP Echo handler that reflects to any source address gives you Smurf amplification from L2 adjacency. This post documents the full chain.