msm1267 writes: Backwards compatibility, a necessary evil for Microsoft and its need to support so many legacy applications on Windows, may be its undoing as researchers have found a way to exploit this layer in the operating system to bypass existing mitigations against memory-based exploits. Specifically in this case, researchers slid past Microsoft's Enhanced Mitigation Experience Toolkit, or EMET, a suite of more than a dozen freely available mitigations against memory attacks. The soft spot, the researchers said, is the Windows on Windows, or WoW64, Windows subsystem that allows 32-bit software to run on 64-bit Windows machines. The researchers said 80 percent of browsers in their sample size were 32-bit processes executing on a 64-bit host running WOW64, meaning they're all vulnerable to this attack.
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