Michael Lynn was a security researcher for Internet Security Systems (ISS) until last week when he resigned. Having provided Cisco with a report that clearly outlined a security flaw in its router operating system last April, Lynn was reportedly frustrated with the networking giant’s slow response and decided the right thing to do was to expose a core vulnerability in the internet’s infrastructure. And that’s just what he did at the Black Hat security conference.
In a conference session, Lynn demonstrated how one could exploit a known security flaw on Cisco routers, in effect taking them over and potentially disrupting traffic on the internet, by executing arbitrary code on the Cisco equipment. Lynn told the session attendees that he had quit his job at ISS after the company decided to cancel the previously scheduled session. Session notes for Lynn’s presentation, “The Holy Grail: Cisco IOS Shellcode and Remote Execution,” were removed from the conference proceedings, reportedly by Cisco employees. “I feel I had to do what’s right for our country and the national infrastructure,” said Lynn, addressing the Black Hat conference attendees. “It has been confirmed that bad people are working on this [compromising Cisco’s IOS router operating system]. The right thing to do here is to make sure that everyone knows that it’s vulnerable.”
Internet Security Systems representatives told CNET that Lynn’s presentation was cancelled because “it wasn’t ready yet.” That’s apparently not the full story. “[A] source close to the Black Hat organization said that it wasn’t ISS and Lynn who wanted to cancel the presentation, but Cisco,” according to the CNET report. “The research is very important, and the underlying work is important, but we need to work with Cisco to determine the full impact,” ISS chief technology officer Chris Rouland told the online technology news publication.
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