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Microsoft blocks Black Hat Vista hack
Tuesday, October 24th, 2006
Microsoft has changed Windows Vista to prevent a hack that was demonstrated at a high-profile 
security event this summer, but the fix may spell trouble.
Joanna Rutkowska, a Polish researcher at Singapore-based Coseinc, demonstrated the hack at Black Hat in August. She showed that it was possible to bypass security measures in 64-bit versions of Vista meant to prevent unsigned driver code from running. The bypass could allow the installation of malicious drivers–a serious threat, because they run at a low level in the operating system.
Rutkowska also tried out her exploit on Windows Vista Release Candidate 2, the final test version of the operating system released earlier this month. "It quickly turned out that our exploit doesn’t work anymore," Rutkowska wrote on her blog late Thursday. Microsoft blocks ‘Black Hat’ Vista hack | CNET News.com
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