Detecting vulnerabilities to write exploits

[neelima_2sha () yahoo com]

Hi All, 


This is something very basic to start with the exploit writing. Can anyone let me know these queries:

How do you detect the vulnerability to write a exploit for this? 

Basically i want to know that how do u find in any code of program that there is buffer overflow or any other kind of 
vulnerability existing?

How will analyse this to start writing the exploit with respect to this vulnerability?

I hope the query is clear.

Regards,
Neelima Sharma

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