This is a simple code for Buffer Overflow in C. Allocates the memory for specific range if exceed then shell command can be executed .

buffer_overflow.c

#include<stdio.h>
#include<stdlib.h>

int main()
{

//variables assigned
	char *place;
	char *systemcmd;
	place=(char *)malloc(10);
	systemcmd=(char *)malloc(128);
	
//Print line
	printf("Memory Adress of Place: %d\n",place);
	printf("Memory Adress of Systemcmd: %d\n",systemcmd);
	printf("The space between Place & systemcmd: %d\n",systemcmd - place);

	printf("What is Buffer area?");
	gets(place);


//systemcommand
	printf("The buffer area is: %s\n", place)
	system(systemcmd);

	return 0;

}