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March 15, 2006

RFID Tags Can Carry Viruses - Researchers



Courtesy of TechWeb News

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Radio frequency identification tags (RFID) can be used to spread computer viruses and attack middleware applications and the databases behind them, a group of Netherlands-based scientists said Wednesday.

At an IEEE' conference on pervasive computing in Pisa, Italy, Melanie Rieback, a third-year PhD student at Amsterdam's Vrije Universiteit, presented a paper that outlined the threat to RFID systems and laid out how the small amount of memory in a tag -- in some cases as little as 128 bytes -- could be used to corrupt databases.

RFID tags have been promoted as a more efficient and economical way of tracking products -- from manufacturers to end-users -- and have been thought to be immune from such hacks.

Not so, said Rieback, a U.S. citizen who has studied in the Netherlands for the past five years. "This is a real threat, and it's going to be a larger threat if it's not taken care of," she said Wednesday after presenting her paper "Is Your Cat Infected with a Computer Virus?"

Once a hacker has created a miniature virus -- and perhaps planted a malicious tag on a product in store -- the attack begins as soon as the RFID tag is scanned. Attacks on middleware and the back-end databases, she said, could take the form of buffer overflows, code insertions, and SQL injections (a type of specialized code insertion that tricks a database into running SQL code).

To combat such attacks, middleware and database creators -- including big names like Oracle and SAP -- must harden their products to account for viral infections.

"We wanted to get the message out," she added. "Now they have warning."

Viruses could spread from tag to database, then to other tags in settings where RFID chips are written to, leading to scenarios where one incoming malicious tag leads to a factory sending out millions of infected chips to its customers.

"There are real-world consequences here," said Rieback. "Some car plants use tags on chassis to identify what color the car is to be painted. If a virus instructs the database to write tags that tell [the machinery to] switch colors, you're talking about destroying cars."

Andrew Tanenbaum, Rieback's supervising professor at Vrije Universiteit, had even more dire attacks in mind.

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