버퍼 오버플로우 공격

/*buffer overflow*/

# include <stdio.h>

int main(void)

{

char n[][6] = { "hello", "world" };

/*

   n[ㄱ][ㄴ] ; ㄱ : index // ㄴ : length

*/

printf("n[0] => %s   n[1] => %s\n", n[0], n[1]);

printf("step_1 ++++++++++++++++++++++ \n");

n[0][strlen(n[0])] = 'y'; // step_1

printf("n[0] => %s   n[1] => %s\n", n[0], n[1]);

printf("step_2 ++++++++++++++++++++++ \n");

n[0][strlen(n[0])-1] = 'z'; // step_2

printf("n[0] => %s   n[1] => %s\n", n[0], n[1]);

return 0;

}