Module: Msf::Exploit::Remote::WDBRPC

Included in:
WDBRPC_Client
Defined in:
lib/msf/core/exploit/remote/wdbrpc.rb

Overview

This module exposes methods for manipulating the WDRPC service

Instance Method Summary collapse

Instance Method Details

#wdbrpc_checksum(data) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 195

def wdbrpc_checksum(data)
  sum = 0
  data.unpack("n*").each {|c| sum += c }
  sum = (sum & 0xffff) + (sum >> 16)
  (~sum)
end

#wdbrpc_decode_arr(data, dtype) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 218

def wdbrpc_decode_arr(data, dtype)
  return if data.length < 4
  res = []

  alen = data.slice!(0,4).unpack("N")[0]
  return res if alen == 0

  1.upto(alen) do |idx|
    case dtype
    when :int
      res << wdbrpc_decode_int(data)
    when :str
      res << wdbrpc_decode_str(data)
    when :bool
      res << wdbrpc_decode_bool(data)
    end
  end

  res
end

#wdbrpc_decode_bool(data) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 239

def wdbrpc_decode_bool(data)
  return if data.length < 4
  (data.slice!(0,4).unpack("N")[0] == 0) ? false : true
end

#wdbrpc_decode_int(data) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 213

def wdbrpc_decode_int(data)
  return if data.length < 4
  data.slice!(0,4).unpack("N")[0]
end

#wdbrpc_decode_str(data) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 202

def wdbrpc_decode_str(data)
  return if data.length < 4
  slen = data.slice!(0,4).unpack("N")[0]
  return "" if slen == 0
  while (slen % 4 != 0)
    slen += 1
  end

  data.slice!(0,slen).to_s.split("\x00")[0]
end

#wdbrpc_parse_connect_reply(buff) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 129

def wdbrpc_parse_connect_reply(buff)
  info = {}
  head = buff.slice!(0,36)
  info[:agent_ver] = wdbrpc_decode_str(buff)
  info[:agent_mtu] = wdbrpc_decode_int(buff)
  info[:agent_mod] = wdbrpc_decode_int(buff)
  info[:rt_type]          = wdbrpc_decode_int(buff)
  info[:rt_vers]          = wdbrpc_decode_str(buff)
  info[:rt_cpu_type]      = wdbrpc_decode_int(buff)
  info[:rt_has_fpp]       = wdbrpc_decode_bool(buff)
  info[:rt_has_wp]        = wdbrpc_decode_bool(buff)
  info[:rt_page_size]     = wdbrpc_decode_int(buff)
  info[:rt_endian]        = wdbrpc_decode_int(buff)
  info[:rt_bsp_name]      = wdbrpc_decode_str(buff)
  info[:rt_bootline]      = wdbrpc_decode_str(buff)
  info[:rt_membase]       = wdbrpc_decode_int(buff)
  info[:rt_memsize]       = wdbrpc_decode_int(buff)
  info[:rt_region_count]  = wdbrpc_decode_int(buff)
  info[:rt_regions]       = wdbrpc_decode_arr(buff, :int)
  info[:rt_hostpool_base] = wdbrpc_decode_int(buff)
  info[:rt_hostpool_size] = wdbrpc_decode_int(buff)
  info
end

#wdbrpc_request(procedure, data) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 153

def wdbrpc_request(procedure, data)
  pkt =
    [
      0x00000000, # XID (ignored by checksum and length)
      0x00000000,
      0x00000002,
      0x55555555, # Program
      0x00000001, # Version
      procedure,  # Procedure
      0x00000000,
      0x00000000,
      0x00000000,
      0x00000000
    ].pack("N*")

  pkt +=
    [
      0x00000000, # Checksum
      0x00000000, # Packet Size
      wdbrpc_request_seqno
    ].pack("N*")

  pkt += data

  # Length excludes the XID
  pkt[44, 4] = [ pkt.length - 4].pack("N")

  # Set the checksum flag and calculate the checksum
  pkt[42, 2] = [ wdbrpc_checksum(pkt) ].pack("n")
  pkt[40, 2] = [0xffff].pack("n")

  # Set the RPC XID
  pkt[ 0, 4] = [ rand(0x100000000) ].pack("N")

  pkt
end

#wdbrpc_request_connect(ip) ⇒ Object

WDB_TARGET_CONNECT



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 31

def wdbrpc_request_connect(ip)
  data = [ 0x00000002, 0x00000000, 0x00000000 ].pack("N*")
  wdbrpc_request(1, data)
end

#wdbrpc_request_connect2(ip) ⇒ Object

WDB_TARGET_CONNECT2



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 13

def wdbrpc_request_connect2(ip)
  ip += "\x00"
  while(ip.length % 4 != 0)
    ip << "\x00"
  end

  data = 	[
    0x00000002,
    0x00000000,
    0x00000000,
    0x00000001,
    ip.length
  ].pack("N*") + ip

  wdbrpc_request(0x7a, data)
end

#wdbrpc_request_context_kill(ctx_type, ctx) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 115

def wdbrpc_request_context_kill(ctx_type, ctx)

  # WDB_CTX
  data = [
    ctx_type, # WDB_CTX_SYSTEM (3 for task)
    ctx,      # SYSTEM (or set for task)
  ].pack("N*")

  # options
  data << [ 0 ] .pack("N")

  wdbrpc_request(31, data)
end

#wdbrpc_request_disconnect ⇒ Object

WDB_TARGET_DISCONNECT



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 37

def wdbrpc_request_disconnect
  data = [ 0x00000002, 0x00000000, 0x00000000 ].pack("N*")
  wdbrpc_request(2, data)
end

#wdbrpc_request_memread(offset = 0, length = 512, params = 0) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 62

def wdbrpc_request_memread(offset=0, length=512, params=0)

  # WDB_MEM_REGION
  data = [
    offset, # baseAddress
    length, # numberOfBytes
    params, # params
  ].pack("N*")

  wdbrpc_request(10, data)
end

#wdbrpc_request_memscan(offset = 0, depth = 1024, buff = '', params = 0) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 92

def wdbrpc_request_memscan(offset=0, depth=1024, buff='', params=0)
  # Make sure its DWORD aligned
  while(buff.length % 4 != 0)
    buff << "\x00"
  end

  # WDB_MEM_REGION
  data = [
    offset, # baseAddress
    depth,  # numberOfBytes
    params, # params
  ].pack("N*")

  # WDB_MEM_XFER
  data << [
    buff.length,
    0,
    buff.length
  ].pack("N*") + buff

  wdbrpc_request(11, data)
end

#wdbrpc_request_memwrite(offset = 0, buff = '', params = 0) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 74

def wdbrpc_request_memwrite(offset=0, buff='', params=0)

  # Make sure its DWORD aligned
  while(buff.length % 4 != 0)
    buff << "\x00"
  end

  # WDB_MEM_XFER
  data = [
    buff.length,
    offset,      # target
    buff.length
  ].pack("N*") + buff

  wdbrpc_request(11, data)
end

#wdbrpc_request_regread(regset = 0, offset = 0, length = 512, params = 0) ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 42

def wdbrpc_request_regread(regset=0, offset=0, length=512, params=0)
  data = [ regset ].pack("N")

  # WDB_CTX
  data << [
    0, # WDB_CTX_SYSTEM (3 for task)
    0, # SYSTEM (or set for task)
  ].pack("N*")

  # WDB_MEM_REGION
  data << [
    offset, # baseAddress
    length, # numberOfBytes
    params, # params
  ].pack("N*")

  wdbrpc_request(40, data)
end

#wdbrpc_request_seqno ⇒ Object 



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# File 'lib/msf/core/exploit/remote/wdbrpc.rb', line 190

def wdbrpc_request_seqno
  @wdbrpc_seqno ||= 0
  @wdbrpc_seqno += 1
end