Cisco Security Hole a Whopper

LAS VEGAS -- A bug discovered in an operating system that runs the majority of the world's computer networks would, if exploited, allow an attacker to bring down the nation's critical infrastructure, a computer security researcher said Wednesday against threat of a lawsuit.

Michael Lynn, a former research analyst with Internet Security Systems, quit his job at ISS Tuesday morning before disclosing the flaw at Black Hat Briefings, a conference for computer security professionals held annually here.

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