This is similar to about level 2 or 3, out of 5, of some cracks I've done for security CTF (capture the flag) competitions. Almost every competitive team/indiv

This is similar to about level 2 or 3, out of 5, of some cracks I've done for security CTF (capture the flag) competitions. Almost every competitive team/individual will solve this pretty easily, and I haven't even been in the elite competitions where it probably gets much harder. So, I would expect there are harder cracks or exploits, if the company wants to hire the best. By the way, if this sort of thing interests anyone, look into security CTF competitions. You'll probably have to read some tutorials to learn, but CTF's will give the opportunity to apply what you've learned.