Buffer Overflow Exploit and Defensive Techniques

Buffer overflow attack is most common and dangerous attack method at present. So the analysis is useful in studying the principle of buffer overflow and buffer overflow exploits. In the paper a didactic example is included to illustrate one method of buffer overflow exploits, and though adding a jmp esp instruction into the process space as a springboard, it makes the shell code successfully to be executed. Finally, an overview for protecting and defending against buffer overflow is summarized.