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25 January, 08:18

What is the nx bit and which form of the buffer overflow attack does it protect against?

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  1. 25 January, 10:20
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    NX bit marks parts of memory as "no execute", so that even if it contains executable code, the CPU will not execute it. Some buffer overflow exploits place executable code in a buffer (and beyond), then attempt to redirect execution to this area to gain control over a process.

    In windows this is called Data Execution Prevention.
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