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November 22, 2019
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www.waraxe.us Forum Index -> All other security holes -> Meta tags exploit
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Meta tags exploit
PostPosted: Sat Jul 17, 2004 8:32 pm Reply with quote
Harry
Regular user
Regular user
 
Joined: May 20, 2004
Posts: 14




Many sites allow you to use html tags viz in Guestbooks, feedbacks, topsites etc. This can easily be exploited to redirect the entire webpage to whatever site/page you want.

Proof of concept:

Sign up for a topsites where you are allowed to use html tags in site description & use the followeing tag:

<meta http-equiv="refresh" content="1;URL=http://harry-inc.com"> to redirect the entire page to your site Wink

Solution: Disable HTML tags
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Re: Meta tags exploit
PostPosted: Sun Jul 18, 2004 10:13 pm Reply with quote
waraxe
Site admin
Site admin
 
Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




Harry wrote:

Solution: Disable HTML tags


Harder way is to allow some html tags, like <b>, <u>, etc.
But this needs bulletproof sanitizing code Smile
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Meta tags exploit
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