CoCalc provides the best real-time collaborative environment for Jupyter Notebooks, LaTeX documents, and SageMath, scalable from individual users to large groups and classes!

1
# frozen_string_literal: true
2

3
require 'rex/proto/ldap/auth_adapter'
4

5
module Metasploit
6
  module Framework
7
    module LDAP
8

9
      module Client
10
        def ldap_connect_opts(rhost, rport, connect_timeout, ssl: true, opts: {})
11
          connect_opts = {
12
            host: rhost,
13
            port: rport,
14
            connect_timeout: connect_timeout,
15
            proxies: opts[:proxies]
16
          }
17

18
          if ssl
19
            connect_opts[:encryption] = {
20
              method: :simple_tls,
21
              tls_options: {
22
                verify_mode: OpenSSL::SSL::VERIFY_NONE
23
              }
24
            }
25
          end
26

27
          case opts[:ldap_auth]
28
          when Msf::Exploit::Remote::AuthOption::SCHANNEL
29
            connect_opts.merge!(ldap_auth_opts_schannel(opts, ssl))
30
          when Msf::Exploit::Remote::AuthOption::KERBEROS
31
            connect_opts.merge!(ldap_auth_opts_kerberos(opts, ssl))
32
          when Msf::Exploit::Remote::AuthOption::NTLM
33
            connect_opts.merge!(ldap_auth_opts_ntlm(opts, ssl))
34
          when Msf::Exploit::Remote::AuthOption::PLAINTEXT
35
            connect_opts.merge!(ldap_auth_opts_plaintext(opts))
36
          when Msf::Exploit::Remote::AuthOption::AUTO
37
            if opts[:username].present? && opts[:domain].present?
38
              connect_opts.merge!(ldap_auth_opts_ntlm(opts, ssl))
39
            elsif opts[:username].present?
40
              connect_opts.merge!(ldap_auth_opts_plaintext(opts))
41
            end
42
          end
43

44
          connect_opts
45
        end
46

47
        private
48

49
        def ldap_auth_opts_kerberos(opts, ssl)
50
          auth_opts = {}
51
          raise Msf::ValidationError, 'The LDAP::Rhostname option is required when using Kerberos authentication.' if opts[:ldap_rhostname].blank?
52
          raise Msf::ValidationError, 'The DOMAIN option is required when using Kerberos authentication.' if opts[:domain].blank?
53

54
          offered_etypes = Msf::Exploit::Remote::AuthOption.as_default_offered_etypes(opts[:ldap_krb_offered_enc_types])
55
          raise Msf::ValidationError, 'At least one encryption type is required when using Kerberos authentication.' if offered_etypes.empty?
56

57
          sign_and_seal = opts.fetch(:sign_and_seal, !ssl)
58
          kerberos_authenticator = Msf::Exploit::Remote::Kerberos::ServiceAuthenticator::LDAP.new(
59
            host: opts[:domain_controller_rhost].blank? ? nil : opts[:domain_controller_rhost],
60
            hostname: opts[:ldap_rhostname],
61
            realm: opts[:domain],
62
            username: opts[:username],
63
            password: opts[:password],
64
            framework: opts[:framework],
65
            framework_module: opts[:framework_module],
66
            cache_file: opts[:ldap_krb5_cname].blank? ? nil : opts[:ldap_krb5_cname],
67
            ticket_storage: opts[:kerberos_ticket_storage],
68
            offered_etypes: offered_etypes,
69
            mutual_auth: true,
70
            use_gss_checksum: sign_and_seal || ssl
71
          )
72

73
          auth_opts[:auth] = {
74
            method: :rex_kerberos,
75
            kerberos_authenticator: kerberos_authenticator,
76
            sign_and_seal: sign_and_seal
77
          }
78

79
          auth_opts
80
        end
81

82
        def ldap_auth_opts_ntlm(opts, ssl)
83
          auth_opts = {}
84

85
          auth_opts[:auth] = {
86
            # use the rex one provided by us to support TLS channel binding (see: ruby-ldap/ruby-net-ldap#407) and blank
87
            # passwords (see: WinRb/rubyntlm#45)
88
            method: :rex_ntlm,
89
            username: opts[:username],
90
            password: opts[:password],
91
            domain: opts[:domain],
92
            workstation: 'WORKSTATION',
93
            sign_and_seal: opts.fetch(:sign_and_seal, !ssl)
94
          }
95

96
          auth_opts
97
        end
98

99
        def ldap_auth_opts_plaintext(opts)
100
          auth_opts = {}
101
          raise Msf::ValidationError, 'Can not sign and seal when using Plaintext authentication.' if opts.fetch(:sign_and_seal, false)
102

103
          auth_opts[:auth] = {
104
            method: :simple,
105
            username: opts[:username],
106
            password: opts[:password]
107
          }
108
          auth_opts
109
        end
110

111
        def ldap_auth_opts_schannel(opts, ssl)
112
          auth_opts = {}
113
          pfx_path = opts[:ldap_cert_file]
114
          raise Msf::ValidationError, 'The SSL option must be enabled when using Schannel authentication.' unless ssl
115
          raise Msf::ValidationError, 'The LDAP::CertFile option is required when using Schannel authentication.' if pfx_path.blank?
116
          raise Msf::ValidationError, 'Can not sign and seal when using Schannel authentication.' if opts.fetch(:sign_and_seal, false)
117

118
          unless ::File.file?(pfx_path) && ::File.readable?(pfx_path)
119
            raise Msf::ValidationError, 'Failed to load the PFX certificate file. The path was not a readable file.'
120
          end
121

122
          begin
123
            pkcs = OpenSSL::PKCS12.new(File.binread(pfx_path), '')
124
          rescue StandardError => e
125
            raise Msf::ValidationError, "Failed to load the PFX file (#{e})"
126
          end
127

128
          auth_opts[:auth] = {
129
            method: :sasl,
130
            mechanism: 'EXTERNAL',
131
            initial_credential: '',
132
            challenge_response: true
133
          }
134
          auth_opts[:encryption] = {
135
            method: :start_tls,
136
            tls_options: {
137
              verify_mode: OpenSSL::SSL::VERIFY_NONE,
138
              cert: pkcs.certificate,
139
              key: pkcs.key
140
            }
141
          }
142
          auth_opts
143
        end
144
      end
145
    end
146
  end
147
end
148

149