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You probably won't need to turn off your cellphones and Pocket PCs just yet. But there is talk of a year-old Bluetooth vulnerability that can allow, under certain circumstances, for a bluetooth worm to spread automatically. "Bluetooth has suffered a number of security alerts over the past year ranging from the relatively harmless to the incredibly serious. The first known Bluetooth vulnerability was the Cabir worm, which was discovered a month ago. The security problems do not seem to stem from the Bluetooth standard itself, but rather the way in which handset manufacturers have implemented the technology.
Mikko Hyppönen, director of antivirus research at Finnish firm F-Secure, said an MSBlast or Sasser-style worm spreading between Bluetooth devices becomes possible if handsets can be made to accept and execute a file without first asking the user for permission.
"If you can get Bluetooth file transfers to be accepted automatically, that would end up with an automatic Bluetooth worm. They could combine the bluesnarfing technique to automatically accept a Bluetooth file offering," said Hyppönen. "
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