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--TEST--
Bug #70219 Use after free vulnerability in session deserializer
--EXTENSIONS--
session
--INI--
error_reporting=E_ALL&~E_DEPRECATED
--FILE--
<?php
class obj implements Serializable {
var $data;
function serialize() {
return serialize($this->data);
}
function unserialize($data) {
session_start();
session_decode($data);
}
}
$inner = 'ryat|a:1:{i:0;a:1:{i:1;';
$exploit = 'a:2:{i:0;C:3:"obj":'.strlen($inner).':{'.$inner.'}i:1;R:4;}';
$data = unserialize($exploit);
for ($i = 0; $i < 5; $i++) {
$v[$i] = 'hi'.$i;
}
var_dump($data);
?>
--EXPECTF--
Warning: session_decode(): Failed to decode session object. Session has been destroyed in %s on line %d
Warning: unserialize(): Error at offset 55 of 56 bytes in %s on line %d
bool(false)
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