Windows 7 and Mac OS X each have a new, fundamental flaw that will be presented at the Hack in the Box conference in Amsterdam in July. These security holes are so close to the core operating systems that fixing them may be very hard.Windows 7 has an issue in the 64-bit edition of the operating system.Security researchers at Sogeti/ESEC, Christophe Devine and Damien Aumaitre, discovered weaknesses in Direct Memory Access (DMA). An attacker could use those vulnerabilities to get access and take control of the machine, thereby bypassing all security features of the operating system.

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