Username: 
Password: 
Restrict session to IP 

Some notes  Go to the The BrownOS challenge

1 2 3
Global Rank: 1
Totalscore: 748682
Posts: 408
Thanks: 457
UpVotes: 405
Registered: 11y 85d












The User is Offline
Some notes
Google/translate8Thank You!2Good Post!1Bad Post! link
The service has some restrictions on input size, memory and execution time. They should be more than fair for what you need, but if for some reason you think they are too restrictive, let me know and we'll have a look.

For those who are wondering what QD means, perhaps you should move your nose off the screen. :p It's right there, ffs! Some people make challenges out of anything and nothing... ;)

The only thing I'm not sure about is how hard it is to understand what is going on exactly. You should be able to deduce a few things, but perhaps it is not enough to power your light bulb. When you have deduced a fair number of things and can't make any more sense of it, feel free to contact me. If needed, I'll extend the cheat sheet a bit.
Global Rank: 1
Totalscore: 748682
Posts: 408
Thanks: 457
UpVotes: 405
Registered: 11y 85d












The User is Offline
RE: Some notes
Google/translate2Thank You!1Good Post!1Bad Post! link
So.. two years and still no solvers. There are no words to express my disappointment in all of you. ;)

At least some of you have found a little bit of information, but I haven't heard of anyone figuring out the meaning of the input codes. Figuring out that part is probably the most important thing to do, if only because it is essential to eventually getting the solution. The outputs should help a lot in figuring this out, as well as just trying out various inputs.

Here are two little hints for those who want it:

The second example in the cheat sheet, besides providing a way to get some easy outputs, is also useful in figuring out some crucial properties of the codes.

The different outputs betray some core structures. This should give you some substructures that might be helpful elsewhere.


One final thing: just like with QD, don't be too literal with the ??s. :)
Global Rank: 1
Totalscore: 748682
Posts: 408
Thanks: 457
UpVotes: 405
Registered: 11y 85d












The User is Offline
RE: Some notes
Google/translate3Thank You!1Good Post!1Bad Post! link
Just made a fix after jjk found some unusual behaviour. Normal inputs were fine, but certain inputs that didn't confirm to expectations resulted in odd behaviour.

I doubt this threw people off too much, but if it did you are eligible for one (1) apology.
Global Rank: 575
Totalscore: 40694
Posts: 16
Thanks: 13
UpVotes: 16
Registered: 2y 356d
FranzT`s Avatar
Last Seen: 3d 7h
The User is Offline
RE: Some notes
Google/translate2Thank You!1Good Post!1Bad Post! link
Is it the expected behaviour to receive some output only if the syntax is wrong?
Global Rank: 1
Totalscore: 748682
Posts: 408
Thanks: 457
UpVotes: 405
Registered: 11y 85d












The User is Offline
RE: Some notes
Google/translate3Thank You!1Good Post!1Bad Post! link
Quote from FranzT
Jan 11, 2018 - 10:03:20

Is it the expected behaviour to receive some output only if the syntax is wrong?

No.
Global Rank: 2899
Totalscore: 6109
Posts: 5
Thanks: 8
UpVotes: 4
Registered: 2y 340d
Last Seen: 2y 137d
The User is Offline
RE: Some notes
Google/translate2Thank You!1Good Post!1Bad Post! link
It seems like all I can get is "Invalid term!", is there meant to be another message?
Global Rank: 1
Totalscore: 748682
Posts: 408
Thanks: 457
UpVotes: 405
Registered: 11y 85d












The User is Offline
RE: Some notes
Google/translate3Thank You!0Good Post!1Bad Post! link
Quote from dp_1
Mar 05, 2018 - 17:02:41

It seems like all I can get is "Invalid term!", is there meant to be another message?

Yes. Perhaps you are sending ASCII instead of bytes?
Global Rank: 2899
Totalscore: 6109
Posts: 5
Thanks: 8
UpVotes: 4
Registered: 2y 340d
Last Seen: 2y 137d
The User is Offline
RE: Some notes
Google/translate2Thank You!1Good Post!1Bad Post! link
I got some better output, at first I was sending the 'BrownOS[' and ']' as well
Global Rank: 232
Totalscore: 85395
Posts: 1389
Thanks: 1221
UpVotes: 738
Registered: 12y 246d




Last Seen: 1d 18h
The User is Offline
RE: Some notes
Google/translate1Thank You!1Good Post!1Bad Post! link
I get absolutely no response, although netcat connection works...
I guess it is a binary protocol?
Can someone write a client? Drool

Where is my cheatsheet?!
The geeks shall inherit the properties and methods of object earth.
Global Rank: 2899
Totalscore: 6109
Posts: 5
Thanks: 8
UpVotes: 4
Registered: 2y 340d
Last Seen: 2y 137d
The User is Offline
RE: Some notes
Google/translate2Thank You!1Good Post!1Bad Post! link
Definitely a binary protocol, also don't forget the 0xFF at the end
1 2 3
DrOptix, macplox, l3st3r, UnQuaiz, dloser, Redknee, ckclark, tunelko, silenttrack, qdxy, n0tHappy, TheHiveMind, Z, Ge0, samuraiblanco, arraez, jcquinterov, hophuocthinh, alfamen2, burhanudinn123, Ben_Dover, stephanduran89, braddie0 have subscribed to this thread and receive emails on new posts.
1 people are watching the thread at the moment.
This thread has been viewed 470396 times.