Microsoft has modified Windows Vista to prevent a high-profile exploit demonstrated at security conferences this summer but the fix creates as many problems as it solves, according to the security researcher who identified the original problem.

The bug, demonstrated by Joanna Rutkowska of security firm Coseinc, created a possible mechanism for hackers to bypass security protection built into 64-bit versions of Vista in order to inject potentially hostile code into the kernel of prototype versions of Windows. This so-called "pagefile attack" defeated a feature called Vista kernel protection.

At The Register.

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