Some notes Go to the The BrownOS challenge
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RE: Some notes
Mar 13, 2018 - 11:27:52 (6y 289d)
Mar 13, 2018 - 11:27:52 (6y 289d)
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
Mar 13, 2018 - 17:02:25 (6y 289d)
Mar 13, 2018 - 17:02:25 (6y 289d)
The example from the cheat sheet should be a good start to not get that message...
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RE: Some notes
May 09, 2018 - 23:47:11 (6y 231d)
May 09, 2018 - 23:47:11 (6y 231d)
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
May 10, 2018 - 03:29:22 (6y 231d)
May 10, 2018 - 03:29:22 (6y 231d)
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
May 10, 2018 - 03:34:16 (6y 231d)
May 10, 2018 - 03:34:16 (6y 231d)
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.
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RE: Some notes
May 10, 2018 - 15:24:09 (6y 231d)
May 10, 2018 - 15:24:09 (6y 231d)
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.
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RE: Some notes
May 13, 2018 - 19:47:45 (6y 228d)
May 13, 2018 - 19:47:45 (6y 228d)
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! ;)
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RE: Some notes
May 17, 2018 - 21:01:05 (6y 223d)
May 17, 2018 - 21:01:05 (6y 223d)
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
May 17, 2018 - 21:26:16 (6y 223d)
May 17, 2018 - 21:26:16 (6y 223d)
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.
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RE: Some notes
May 22, 2018 - 22:31:12 (6y 218d)
May 22, 2018 - 22:31:12 (6y 218d)
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?
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