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Medical-device security isn't tracked well, research shows

By Ellen Messmer
July 19, 2012 05:35 PM ET

"We believe the inconsistency between databases is due to lack of a meaningful and convenient reporting mechanism, but we also believe that clinicians without expertise in computer security are unlikely to recognize the difference between a virus infection and a crashed or slow computer," the study points out. "Time pressure, lack of incentives, lack of federal safe harbor policies, and lack of clear actionable guidance further reduce the probability of incident reporting by clinicians and information technology staff."

Fu said he he's been in contact with professionals at clinics and hospitals where individuals are "essentially afraid of reporting issues on paper for liability issues." He notes the U.S. may want to consider looking at the kinds of "safe harbor" laws that have helped other industries, such as aviation, in identifying safety issues.

The MAUDE database showed no events related to privacy and security, in spite of about 1,000 possible product problems, the study said. As if to test MAUDE's effectiveness, one of the study's co-authors submitted a software vulnerability report for an automated external defibrillator on July 19, 2011, and found by Jan. 19, 2012, the report had not yet been processed into MAUDE. By April of this year, MAUDE did finally contain the submitted report.

"The report processing took nine months. As the time from discovery of a conventional computer security vulnerability to the global exploitation of the flaw is often measured in hours, a nine-month processing delay may not be an effective strategy for ensuring the safety of software-related medical devices," the study says.

The study says there has not yet been any major known and sustained vicious attack on medical devices intended to harm patients in the U.S. But there have been many instances of malware infecting PCs used to operate medical equipment, sometimes even turning medical devices into botnets that are often used by remote command-and-control operators for things such as spam relays. Vendors of the equipment are getting blamed.

"Common causes of infections include use of the Internet and USB flash memory drives from vendors who are paradoxically updating software on medical devices," the study notes. "In one instance, a factory-installed device arrived already infected by malware. All detected malware pertained to conventional compute viruses rather than malware customized for medical devices. The most prevalent malware converted the medical devices into becoming nodes of 'botnet' criminal networks. Organized crime rents out botnets for others to distribute spam anonymously and for mounting targeted attacks on information infrastructure."

In contrast to the lack of consistency and clarity the researchers found in the three databases, one other database they looked at showed how serious malware infections can be in hospitals.

Originally published on www.networkworld.com. Click here to read the original story.
Reprinted with permission from NetworkWorld.com. Story copyright 2012 Network World, Inc. All rights reserved.
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