Blacknurse Low- Volume DOS Attack Targets Firewalls

A type of denial of service attack relevant in the 1990s has resurfaced with surprising potency against modern-day firewalls. Dubbed a BlackNurse attack, the technique leverages a low-volume Internet Control Message Protocol (ICMP) -based attack on vulnerable firewalls made by Cisco, Palo Alto, SonicWall and others, according to researchers. TDC Security Operations Center, a security firm that published a technical report (PDF) on BlackNurse this week, said the attack is more traditionally...

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