Some notes Go to the The BrownOS challenge
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RE: Some notes
Март 13, 2018 - 11:27:52 (7y 73d)
Март 13, 2018 - 11:27:52 (7y 73d)
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
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RE: Some notes
Март 13, 2018 - 17:02:25 (7y 73d)
Март 13, 2018 - 17:02:25 (7y 73d)
The example from the cheat sheet should be a good start to not get that message...
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RE: Some notes
Мај 09, 2018 - 23:47:11 (7y 16d)
Мај 09, 2018 - 23:47:11 (7y 16d)
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.
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RE: Some notes
Мај 10, 2018 - 03:29:22 (7y 16d)
Мај 10, 2018 - 03:29:22 (7y 16d)
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.
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RE: Some notes
Мај 10, 2018 - 03:34:16 (7y 16d)
Мај 10, 2018 - 03:34:16 (7y 16d)
Quote from l3st3rМај 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.
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RE: Some notes
Мај 10, 2018 - 15:24:09 (7y 15d)
Мај 10, 2018 - 15:24:09 (7y 15d)
Quote from macploxМај 10, 2018 - 03:34:16
Quote from l3st3rМај 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.
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RE: Some notes
Мај 13, 2018 - 19:47:45 (7y 12d)
Мај 13, 2018 - 19:47:45 (7y 12d)
Quote from dloserМарт 05, 2018 - 17:12:26
Quote from dp_1Март 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! ;)
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RE: Some notes
Мај 17, 2018 - 21:01:05 (7y 8d)
Мај 17, 2018 - 21:01:05 (7y 8d)
If the server replies immediately with no results (port closes, no data from server), does that indicate an error?
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RE: Some notes
Мај 17, 2018 - 21:26:16 (7y 8d)
Мај 17, 2018 - 21:26:16 (7y 8d)
Quote from l3st3rМај 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.
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RE: Some notes
Мај 22, 2018 - 22:31:12 (7y 3d)
Мај 22, 2018 - 22:31:12 (7y 3d)
Quote from dloserМај 17, 2018 - 21:26:16
Quote from l3st3rМај 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?
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