BlackNurse attack: 1 laptop can DoS some firewalls, bring down big servers

An attacker doesn’t need an IoT botnet or massive resources for a denial of service attack to knock large servers offline; researchers warned that all it takes is one laptop for a “BlackNurse” attack to bring vulnerable Cisco, SonicWall, Palo Alto and Zyxel firewalls to their knees.

Danish researchers at the Security Operations Center of telecom operator TDC described BlackNurse as a low bandwidth Internet Control Message Protocol (ICMP) attack that “is capable of doing a denial of service to well-known firewalls.”

In their report (pdf), the researchers wrote:

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