Siemens, which made the industrial controllers targeted by the Stuxnet cyberweapon, announced last week that it was releasing some patches aimed at foiling attacks on its hardware similar to those mounted by the now-famous worm. Previous versions of the controllers used in SCADA systems allowed DLL files to be loaded into the devices without validation. The fix by Siemens prevents that from happening now. "This is a step in the right direction," said Eric Byres, CTO and vice president for engineering at Tofino Security Products. 
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