August 6, 2009 4:00 AM PDT by Elinor Mills
If you're a criminal and you want to break into a network, a common attack method is to exploit a hole in software that exists on most computers, has its fair share of holes, and isn't automatically updated.
In 2002, that would have been Windows. Today, it's likely to be Adobe Reader or Flash Player, whose share of vulnerabilities and exploits are on the rise while Microsoft's is falling.
Nearly half of targeted attacks exploit holes in Acrobat Reader, which is used to read PDF (portable document format) files, according to F-Secure. Meanwhile, the number of PDF files used in dangerous Web drive-by attacks jumped from 128 during the first three and a half months of last year to more than 2,300 during that time this year, the company said.
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