CVE-2017-3857

CVE-2017-3857 is a DoS vulnerability in Cisco IOS (12.0–12.4, 15.0–15.6) and IOS XE (3.1–3.18) caused by improper validation in the Layer 2 Tunneling Protocol (L2TP) parsing function. An unauthenticated, remote attacker can send crafted L2TP packets to trigger a device reload when the L2TP featur...