Vulnerable binary and source code for Simplifying Format String Exploits with libformatstr tutorial.

ex1

ex1.c

/* compile: gcc -Wno-format-security ex1.c -o ex1 */ 
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

void win() {
    system("/bin/sh");
}

void main(int argc, char *argv[]) {
    char buf[103]; 
    fgets(buf, 103, stdin); 
    buf[strlen(buf)-1] = 0x0; 
    printf(buf); 
    exit(0);
}

simplifying-format-strings-libformatstr.md

This repository contains the vulnerable binary used in the Simplyfing Format String Exploits with libformatstr tutorial found at http://blog.techorganic.com/simplifying-format-string-exploitation-with-libformatstr/