CVE-2017-5340

Zend/zend_hash.c en PHP en versiones anteriores a 7.0.15 y 7.1.x en versiones anteriores a 7.1.1 no maneja adecuadamente ciertos casos que requieren asignaciones de array grandes, lo que permite a atacantes remotos ejecutar código arbitrario o provocar una denegación de servicio (desbordamiento de enteros, acceso a memoria no inicializada y uso de punteros de la función de destructor arbitrarios) a través de datos serializados manipulados.

USN-3211-1 fixed vulnerabilities in PHP by updating to the new 7.0.15 upstream release. PHP 7.0.15 introduced a regression when using MySQL with large blobs. This update fixes the problem with a backported fix. It was 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. It was 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. It was discovered that PHP incorrectly handled unserializing certain wddxPacket XML documents. A remote attacker could use this issue to cause PHP to crash, resulting in a denial of service, or possibly execute arbitrary code. Various other issues were also addressed.