Some notes Go to the The BrownOS challenge
Global Rank: 2193
Totalscore: 11423
Posts: 4
Thanks: 5
UpVotes: 4
Registered: 8y 96d
Last Seen: 70d 17h
The User is Offline
RE: Some notes
Mar 13, 2018 - 11:27:52 (6y 258d)
Mar 13, 2018 - 11:27:52 (6y 258d)
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
I'm curious if this has anything to do with things like eBPF
Global Rank: 1
Totalscore: 759074
Posts: 437
Thanks: 496
UpVotes: 469
Registered: 15y 122d
The User is Offline
RE: Some notes
Mar 13, 2018 - 17:02:25 (6y 258d)
Mar 13, 2018 - 17:02:25 (6y 258d)
The example from the cheat sheet should be a good start to not get that message...
Global Rank: 794
Totalscore: 32552
Posts: 74
Thanks: 38
UpVotes: 48
Registered: 6y 295d
Last Seen: 3y 159d
The User is Offline
RE: Some notes
May 09, 2018 - 23:47:11 (6y 201d)
May 09, 2018 - 23:47:11 (6y 201d)
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.
"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: 794
Totalscore: 32552
Posts: 74
Thanks: 38
UpVotes: 48
Registered: 6y 295d
Last Seen: 3y 159d
The User is Offline
RE: Some notes
May 10, 2018 - 03:29:22 (6y 201d)
May 10, 2018 - 03:29:22 (6y 201d)
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: 2193
Totalscore: 11423
Posts: 4
Thanks: 5
UpVotes: 4
Registered: 8y 96d
Last Seen: 70d 17h
The User is Offline
RE: Some notes
May 10, 2018 - 03:34:16 (6y 201d)
May 10, 2018 - 03:34:16 (6y 201d)
Quote from l3st3rMay 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: 794
Totalscore: 32552
Posts: 74
Thanks: 38
UpVotes: 48
Registered: 6y 295d
Last Seen: 3y 159d
The User is Offline
RE: Some notes
May 10, 2018 - 15:24:09 (6y 200d)
May 10, 2018 - 15:24:09 (6y 200d)
Quote from macploxMay 10, 2018 - 03:34:16
Quote from l3st3rMay 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: 794
Totalscore: 32552
Posts: 74
Thanks: 38
UpVotes: 48
Registered: 6y 295d
Last Seen: 3y 159d
The User is Offline
RE: Some notes
May 13, 2018 - 19:47:45 (6y 197d)
May 13, 2018 - 19:47:45 (6y 197d)
Quote from dloserMar 05, 2018 - 17:12:26
Quote from dp_1Mar 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: 794
Totalscore: 32552
Posts: 74
Thanks: 38
UpVotes: 48
Registered: 6y 295d
Last Seen: 3y 159d
The User is Offline
RE: Some notes
May 17, 2018 - 21:01:05 (6y 193d)
May 17, 2018 - 21:01:05 (6y 193d)
If the server replies immediately with no results (port closes, no data from server), does that indicate an error?
Global Rank: 1
Totalscore: 759074
Posts: 437
Thanks: 496
UpVotes: 469
Registered: 15y 122d
The User is Offline
RE: Some notes
May 17, 2018 - 21:26:16 (6y 193d)
May 17, 2018 - 21:26:16 (6y 193d)
Quote from l3st3rMay 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: 227
Totalscore: 94366
Posts: 1680
Thanks: 1358
UpVotes: 920
Registered: 16y 284d
Last Seen: 1d 6h
The User is Offline
RE: Some notes
May 22, 2018 - 22:31:12 (6y 188d)
May 22, 2018 - 22:31:12 (6y 188d)
Quote from dloserMay 17, 2018 - 21:26:16
Quote from l3st3rMay 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.
DrOptix, macplox, l3st3r, UnQuaiz, Donlon, dloser, Redknee, ckclark, tunelko, silenttrack, n0tHappy, nonfungiblesecurity, quangntenemy, TheHiveMind, Z, balicocat, Ge0, samuraiblanco, arraez, jcquinterov, hophuocthinh, alfamen2, burhanudinn123, Ben_Dover, stephanduran89, braddie0, SwolloW, dangarbri, csuquvq 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 704946 times.
1 people are watching the thread at the moment.
This thread has been viewed 704946 times.