Username: 
Password: 
Restrict session to IP 

Some notes  Go to the The BrownOS challenge

1 2 3
Global Rank: 1931
Totalscore: 11242
Posts: 4
Thanks: 5
UpVotes: 4
Registered: 4y 96d
Last Seen: 198d 10h
The User is Offline
RE: Some notes
Google/translate1Thank You!1Good Post!0Bad Post! link
I'm able to get the "Invalid term!" message if i echo anything with 0xFF bytes in it. Wireshark, amap and amapcrap were entertaining at best in terms of fuzzing it. Anyone try talking to the service with Scapy yet? I'm just starting to read up on it...

I'm curious if this has anything to do with things like eBPF
Global Rank: 1
Totalscore: 748639
Posts: 408
Thanks: 457
UpVotes: 405
Registered: 11y 123d












The User is Offline
RE: Some notes
Google/translate1Thank You!2Good Post!0Bad Post! link
The example from the cheat sheet should be a good start to not get that message...
Global Rank: 656
Totalscore: 35644
Posts: 74
Thanks: 36
UpVotes: 42
Registered: 2y 296d
Last Seen: 13d 21h
The User is Offline
RE: Some notes
Google/translate1Thank You!1Good Post!0Bad Post! link
I can make it return ...
"a towel!"
and
"O"
" towel!"
(two consecutive reads)
...using the exact same input data. Granted, I had to send a bad QD.
And yes, it is a binary protocol.
Global Rank: 656
Totalscore: 35644
Posts: 74
Thanks: 36
UpVotes: 42
Registered: 2y 296d
Last Seen: 13d 21h
The User is Offline
RE: Some notes
Google/translate1Thank You!1Good Post!0Bad Post! link
Ouch! My program was buggy. I was truncating stuff. Fixed program and now I get some interesting output. Still trying to figure out what the codes mean though.
Global Rank: 1931
Totalscore: 11242
Posts: 4
Thanks: 5
UpVotes: 4
Registered: 4y 96d
Last Seen: 198d 10h
The User is Offline
RE: Some notes
Google/translate1Thank You!1Good Post!0Bad Post! link
Quote from l3st3r
May 10, 2018 - 03:29:22

Ouch! My program was buggy. I was truncating stuff. Fixed program and now I get some interesting output. Still trying to figure out what the codes mean though.



Great work! i'm curious to know your approach to interaction with this.
Global Rank: 656
Totalscore: 35644
Posts: 74
Thanks: 36
UpVotes: 42
Registered: 2y 296d
Last Seen: 13d 21h
The User is Offline
RE: Some notes
Google/translate1Thank You!1Good Post!0Bad Post! link
Quote from macplox
May 10, 2018 - 03:34:16

Quote from l3st3r
May 10, 2018 - 03:29:22

Ouch! My program was buggy. I was truncating stuff. Fixed program and now I get some interesting output. Still trying to figure out what the codes mean though.



Great work! i'm curious to know your approach to interaction with this.


I'm using C and sockets to send and recv.
Global Rank: 656
Totalscore: 35644
Posts: 74
Thanks: 36
UpVotes: 42
Registered: 2y 296d
Last Seen: 13d 21h
The User is Offline
RE: Some notes
Google/translate1Thank You!1Good Post!0Bad Post! link
Quote from dloser
Mar 05, 2018 - 17:12:26

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?

Very tricky! ;)
Global Rank: 656
Totalscore: 35644
Posts: 74
Thanks: 36
UpVotes: 42
Registered: 2y 296d
Last Seen: 13d 21h
The User is Offline
RE: Some notes
Google/translate0Thank You!0Good Post!0Bad Post! link
If the server replies immediately with no results (port closes, no data from server), does that indicate an error?
Global Rank: 1
Totalscore: 748639
Posts: 408
Thanks: 457
UpVotes: 405
Registered: 11y 123d












The User is Offline
RE: Some notes
Google/translate1Thank You!1Good Post!0Bad Post! link
Quote from l3st3r
May 17, 2018 - 21:01:05

If the server replies immediately with no results (port closes, no data from server), does that indicate an error?

No.
Global Rank: 233
Totalscore: 85385
Posts: 1391
Thanks: 1225
UpVotes: 740
Registered: 12y 284d




Last Seen: 1d 20h
The User is Offline
RE: Some notes
Google/translate0Thank You!1Good Post!0Bad Post! link
Quote from dloser
May 17, 2018 - 21:26:16

Quote from l3st3r
May 17, 2018 - 21:01:05

If the server replies immediately with no results (port closes, no data from server), does that indicate an error?

No.

Does it means BrownOS just segfaults on errors?
The geeks shall inherit the properties and methods of object earth.
1 2 3
DrOptix, macplox, l3st3r, UnQuaiz, dloser, Redknee, ckclark, tunelko, silenttrack, 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 481375 times.