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<?php $xml = '<?xml version="1.0" encoding="ISO-8859-1"?> <!DOCTYPE foo [ <!ELEMENT foo ANY > <!ENTITY xxe SYSTEM "file:///etc/passwd" >]><foo>&xxe;</foo>'; libxml_disable_entity_loader(false); $doc = new DOMDocument; $doc->loadXML($xml); echo $doc->saveXML();
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/aOE5B
function name:  (null)
number of ops:  14
compiled vars:  !0 = $xml, !1 = $doc
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%3C%3Fxml+version%3D%221.0%22+encoding%3D%22ISO-8859-1%22%3F%3E%0A+%3C%21DOCTYPE+foo+%5B++%0A+++%3C%21ELEMENT+foo+ANY+%3E%0A+++%3C%21ENTITY+xxe+SYSTEM+%22file%3A%2F%2F%2Fetc%2Fpasswd%22+%3E%5D%3E%3Cfoo%3E%26xxe%3B%3C%2Ffoo%3E'
    8     1        INIT_FCALL                                               'libxml_disable_entity_loader'
          2        SEND_VAL                                                 <false>
          3        DO_FCALL_BY_NAME                                         
    9     4        NEW                                              $4      'DOMDocument'
          5        DO_FCALL                                      0          
          6        ASSIGN                                                   !1, $4
   10     7        INIT_METHOD_CALL                                         !1, 'loadXML'
          8        SEND_VAR_EX                                              !0
          9        DO_FCALL                                      0          
   11    10        INIT_METHOD_CALL                                         !1, 'saveXML'
         11        DO_FCALL                                      0  $8      
         12        ECHO                                                     $8
         13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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