| --TEST-- | |
| Bug #72562: Use After Free in unserialize() with Unexpected Session Deserialization | |
| --EXTENSIONS-- | |
| session | |
| --SKIPIF-- | |
| include('skipif.inc'); | |
| --FILE-- | |
| ini_set('session.serialize_handler', 'php_binary'); | |
| session_start(); | |
| $sess = "\x1xi:1;\x2y"; | |
| session_decode($sess); | |
| $uns_1 = '{'; | |
| $out_1[] = unserialize($uns_1); | |
| unset($out_1); | |
| $fakezval = ptr2str(1122334455); | |
| $fakezval .= ptr2str(0); | |
| $fakezval .= "\x00\x00\x00\x00"; | |
| $fakezval .= "\x01"; | |
| $fakezval .= "\x00"; | |
| $fakezval .= "\x00\x00"; | |
| for ($i = 0; $i < 5; $i++) { | |
| $v[$i] = $fakezval.$i; | |
| } | |
| $uns_2 = 'R:2;'; | |
| $out_2 = unserialize($uns_2); | |
| var_dump($out_2); | |
| function ptr2str($ptr) | |
| { | |
| $out = ''; | |
| for ($i = 0; $i < 8; $i++) { | |
| $out .= chr($ptr & 0xff); | |
| $ptr >>= 8; | |
| } | |
| return $out; | |
| } | |
| --EXPECTF-- | |
| Warning: session_decode(): Failed to decode session object. Session has been destroyed in %s%ebug72562.php on line %d | |
| Warning: unserialize(): Error at offset 0 of 1 bytes in %s on line %d | |
| Warning: unserialize(): Error at offset 4 of 4 bytes in %s on line %d | |
| bool(false) | |