php: bypass __wakeup() in deserialization of an unexpected object

ext/standard/varunserializer.c in PHP before 5.6.25 and 7.x before 7.0.10 mishandles certain invalid objects, which allows remote attackers to cause a denial of service or possibly have unspecified other impact via crafted serialized data that leads to a 1 destruct call or 2 magic method call...