John works as a C programmer. He develops the following C program:

#include

#include

#include

int buffer(char *str) {

char buffer1[10];

strcpy(buffer1, str);

return 1;

}

int main(int argc, char *argv[]) {

buffer (argv[1]);

printf("Executed\n");

return 1;

}

His program is vulnerable to a __________ attack.