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--TEST--
Bug #70172 - Use After Free Vulnerability in unserialize()
--FILE--
<?php
class obj implements Serializable {
var $data;
function serialize() {
return serialize($this->data);
}
function unserialize($data) {
$this->data = unserialize($data);
}
}
class obj2 {
var $ryat;
function __wakeup() {
$this->ryat = 1;
}
}
$fakezval = ptr2str(1122334455);
$fakezval .= ptr2str(0);
$fakezval .= "\x00\x00\x00\x00";
$fakezval .= "\x01";
$fakezval .= "\x00";
$fakezval .= "\x00\x00";
$inner = 'r:2;';
$exploit = 'a:2:{i:0;O:4:"obj2":1:{s:4:"ryat";C:3:"obj":'.strlen($inner).':{'.$inner.'}}i:1;a:1:{i:0;a:1:{i:0;R:4;}}}';
$data = unserialize($exploit);
for ($i = 0; $i < 5; $i++) {
$v[$i] = $fakezval.$i;
}
var_dump($data);
function ptr2str($ptr)
{
$out = '';
for ($i = 0; $i < 8; $i++) {
$out .= chr($ptr & 0xff);
$ptr >>= 8;
}
return $out;
}
?>
--EXPECTF--
array(2) {
[0]=>
object(obj2)#%d (1) {
["ryat"]=>
int(1)
}
[1]=>
array(1) {
[0]=>
array(1) {
[0]=>
object(obj2)#%d (1) {
["ryat"]=>
int(1)
}
}
}
}
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