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www.waraxe.us Forum Index -> Cross-site scripting aka XSS -> XXS Question ..
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XXS Question ..
PostPosted: Sun Jun 20, 2004 1:29 pm Reply with quote
SteX
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Joined: May 18, 2004
Posts: 181
Location: Serbia




Is this valid cookie..Its looks too long for md5 hash..?


I used
Code:
%253cscript>alert%2528document.cookie);%253c/script>
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PostPosted: Sun Jun 20, 2004 5:29 pm Reply with quote
waraxe
Site admin
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




"user=xxxxxxxx..." - this is base64 encoded string. You must first decode it, and after that you will see md5 hash and other components of the user information.
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PostPosted: Sun Jun 20, 2004 9:26 pm Reply with quote
SteX
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Joined: May 18, 2004
Posts: 181
Location: Serbia




Thanks..
btw: stupid JavaScript ,i cant copy & paste user information.. Laughing

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....Watch the master. Follow the master. Be the master....
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PostPosted: Mon Jun 21, 2004 4:03 am Reply with quote
LINUX
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Joined: May 24, 2004
Posts: 404
Location: Caiman




Laughing Laughing Laughing
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PostPosted: Mon Jun 21, 2004 11:18 am Reply with quote
SteX
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Joined: May 18, 2004
Posts: 181
Location: Serbia




Ok
I Decoded:
Code:

NjE0NDpTdGVYOmZiY2RiYWY2ZTM5Y2ZiNzFlMWY3NGM4NTE3NzA0MzEwOjU6OjA6MDowOjA6YXBveDow

To
Code:

 6144:SteX:fbcdbaf6e39cfb71e1f74e8517704310:5::0:0:0:0:apox:0


But this is my Username,not Admin..where did i wrong..?

U use old XSS ([waraxe-2004-SA#002])
Quote:

modules.php?name=News&file=friend&op=StorySent&title=%253cscript>alert%2528document.cookie);%253c/script>

Respect

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We would change the world, but God won't give us the sourcecode...
....Watch the master. Follow the master. Be the master....
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PostPosted: Mon Jun 21, 2004 4:10 pm Reply with quote
vocal
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Joined: Jun 13, 2004
Posts: 18




XSS does nothing useful if YOU run it.
You are supposed to lure a user to it.
This way you will get HIS cookie.

So if you manage an admin to click on that link (of course you 'll somehow hide it), you 'll get his cookie.
You 'll have to change the javascript code though. If he clicks on a link with what you got, HE will see his cookie Smile
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PostPosted: Sun Jul 18, 2004 5:41 am Reply with quote
ic3
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Joined: Jul 18, 2004
Posts: 14




Quote:
"user=xxxxxxxx..." - this is base64 encoded string. You must first decode it, and after that you will see md5 hash and other components of the user information.


sorry for being a noob but how can you decode the base64 string into an md5 hash?

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PostPosted: Sun Jul 18, 2004 10:37 am Reply with quote
waraxe
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Posts: 2407
Location: Estonia, Tartu




ic3 wrote:
Quote:
"user=xxxxxxxx..." - this is base64 encoded string. You must first decode it, and after that you will see md5 hash and other components of the user information.


sorry for being a noob but how can you decode the base64 string into an md5 hash?


You can always use online base64 encoder/decoder at:

http://base64-encoder-online.waraxe.us/base64/base64-encoder.php
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PostPosted: Sun Jul 18, 2004 12:22 pm Reply with quote
ic3
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Joined: Jul 18, 2004
Posts: 14




thankyou =]
how can you tell if a thing is in base64 or not?

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PostPosted: Sun Jul 18, 2004 2:01 pm Reply with quote
waraxe
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




ic3 wrote:
thankyou =]
how can you tell if a thing is in base64 or not?


If string consists only of uppercase/lowercase letters and numbers, and
maybe there is some leading "=" characters, then it CAN be base64-encoded string. To be sure, just try to base64-decode it and see, what result you will get ... Smile
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PostPosted: Sun Jul 18, 2004 3:00 pm Reply with quote
ic3
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Joined: Jul 18, 2004
Posts: 14




thanks.. Laughing what other sorts of encryptions are used for these cookies? (the major ones)

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PostPosted: Sun Jul 18, 2004 10:12 pm Reply with quote
SteX
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Joined: May 18, 2004
Posts: 181
Location: Serbia




sha1 Wink

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....Watch the master. Follow the master. Be the master....
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PostPosted: Mon Jul 19, 2004 12:13 pm Reply with quote
ic3
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Posts: 14




thanks again Surprised

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Base 64 decoder
PostPosted: Mon Jul 19, 2004 8:35 pm Reply with quote
slimjim100
Valuable expert
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Joined: Jun 09, 2004
Posts: 208
Location: USA




Hey do ya know that Cain & Able has a built in Base64 decoder.
and after you get the MD5 Use Cain to crack it with the Rainbow tables.

Sorry I just had to bring up how useful Cain & Able really is. Get you copy at www.oxid.it its freeware so no worries! Very Happy And if you need help with using it I have made a few tutorials here:

http://www.middlegeorgia.org/media/Cain%20and%20ARP%20Poisoning.doc
http://www.middlegeorgia.org/default.asp?id=45&mnu=45
http://www.middlegeorgia.org/default.asp?id=9&mnu=9

Any other questions just send me an e-mail slimjim100(at)hotmail.com

Thnx,

Slimjim100

P.S. Sorry for the image being so big it's just a screen shot LOL.

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XXS Question ..
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