Using the International Space Station as an example of an isolated critical infrastructure, Kaspersky pointed out that despite being in space, it is still vulnerable to attack. In fact, on a number of occasions over the years the orbiting outpost's computers have become infected by malware.
"Scientists, from time to time, are coming to space with USBs which are infected. I'm not kidding," he said. "I was talking to Russian space guys and they said ‘yes, from time to time there are virus epidemics in the space station.'"
He added: "Unfortunately (critical infrastructure networks) are not safe by design."
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In 2008, the space station's systems became infected by the harmless W32.Gammima.AG worm - a piece of software that gathers and transmits sensitive gaming data to an attacker. It's thought the worm was carried into space via an infected flash drive.
Fortunately for astronauts and cosmonauts on the space station, in May this year, it was announced that computer systems would be migrated from the Windows XP operating system to a more secure GNU/Linux operating system, the latter of which is more resilient to accidental uploading of malicious software. This move alone would stamp out any worry of Stuxnet migrating into orbit and substantially reduce the risk of errant worms like W32.Gammima.AG setting up home.