Format String Exploit: Bypass NX bit by overwriting an entry in GOT table

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How to bypass NX bit using format string vulnerability? Enable shell code execution by overwriting the address of puts() in the GOT table with the address of our crafted Variable Environment.
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Nice one. But, can you please tell me that in step 10 (step before finding the addr of env variable), from where you got addr 0x08040a0e?

_ITonRoad