Photo: Kolin Toney/Flickr MIAMI, Florida – A group of researchers has discovered serious security holes in six top industrial control systems used in critical infrastructure and manufacturing facilities and, thanks to exploit modules they released on Thursday, have also made it easy for hackers to attack the systems before they’re patched or taken offline. The vulnerabilities were found in widely used programmable logic controllers (PLCs) made by General Electric, Rockwell Automation, Schneider Modicon, Koyo Electronics and Schweitzer Engineering Laboratories. PLCs are used in industrial control systems to control functions in critical infrastructure such as water, power and chemical plants; gas pipelines and nuclear ...