SYNful Knock is no Stuxnet, says researcher

Yet another set of shivers is running up spines at Cisco, with a researcher from Grid32 claiming that “rooting” the company’s IOS firmware isn’t as hard as people think.
Richard Chirgwin
The issue of compromised firmware arose in August when the company first warned that its ROMMON firmware images could be replaced with a compromised version by a malicious admin.
The vulnerability, since dubbed “SYNful Knock”, has since been spotted in the wild, with Cisco working hard to identify embaddened boxen.
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