Probably task server is down, i can't connect.

difficult

I got to admit that thekidofarcrania gives the best opportunities to learn new things!

I had some weird issues with the server yesterday. I got the shell, but when I entered the command to show the flag, I just got a segmentation fault. Tried it today, and everything worked fine (executed the same commands as yesterday).

If you think you've got your solution, try it outside of GDB! (Learnt this the hard way ...)

very difficult

I tested it on my local machine. But buf is ABOVE good. So with a buffer overflow I cannot get to an address below the starting point. What am I missing?

Maybe you don't need to alter the "good" variable.

How is it possible to get out of good &= buf[i] ^ buf[i]; anything else than 0? XOR of 2 same characters is always 0 and 0 XOR 0 is always 0.

That is the point. You can't so you have to bypass the check

took me lot of time

The challenge is interesting

thanks

Probably task server is down, i can't connect.

difficult

I got to admit that thekidofarcrania gives the best opportunities to learn new things!

I had some weird issues with the server yesterday. I got the shell, but when I entered the command to show the flag, I just got a segmentation fault. Tried it today, and everything worked fine (executed the same commands as yesterday).