ext/standard/var_unserializer.re in PHP before 5.6.26 mishandles object-deserialization failures, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via an unserialize call that references a partially constructed object.
ext/standard/var_unserializer.re en PHP en versiones anteriores a 5.6.26 no maneja correctamente los fallos de deserialización de objeto, lo que podría permitir a atacantes remotos provocar una denegación de servicio (corrupción de memoria) o tener otro posible impacto no especificado a través de una llamada no serializada que referencia a un objeto construido parcialmente.
Taoguang Chen discovered that PHP incorrectly handled certain invalid objects when unserializing data. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. Taoguang Chen discovered that PHP incorrectly handled invalid session names. A remote attacker could use this issue to inject arbitrary session data. Various other issues were also addressed.
