Some notes Go to the The BrownOS challenge
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RE: Some notes
Maart 13, 2018 - 11:27:52 (6y 66d)
Maart 13, 2018 - 11:27:52 (6y 66d)
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
Maart 13, 2018 - 17:02:25 (6y 66d)
Maart 13, 2018 - 17:02:25 (6y 66d)
The example from the cheat sheet should be a good start to not get that message...
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RE: Some notes
Mei 09, 2018 - 23:47:11 (6y 9d)
Mei 09, 2018 - 23:47:11 (6y 9d)
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
Mei 10, 2018 - 03:29:22 (6y 9d)
Mei 10, 2018 - 03:29:22 (6y 9d)
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
Mei 10, 2018 - 03:34:16 (6y 9d)
Mei 10, 2018 - 03:34:16 (6y 9d)
Quote van l3st3rMei 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
Mei 10, 2018 - 15:24:09 (6y 8d)
Mei 10, 2018 - 15:24:09 (6y 8d)
Quote van macploxMei 10, 2018 - 03:34:16
Quote van l3st3rMei 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
Mei 13, 2018 - 19:47:45 (6y 5d)
Mei 13, 2018 - 19:47:45 (6y 5d)
Quote van dloserMaart 05, 2018 - 17:12:26
Quote van dp_1Maart 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
Mei 17, 2018 - 21:01:05 (6y 1d)
Mei 17, 2018 - 21:01:05 (6y 1d)
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
Mei 17, 2018 - 21:26:16 (6y 1d)
Mei 17, 2018 - 21:26:16 (6y 1d)
Quote van l3st3rMei 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
Mei 22, 2018 - 22:31:12 (5y 361d)
Mei 22, 2018 - 22:31:12 (5y 361d)
Quote van dloserMei 17, 2018 - 21:26:16
Quote van l3st3rMei 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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