The host is installed with Apple Mac OS X or Server 10.6.8 through 10.8.x, 10.9.5, 10.10.5 or 10.11.x before 10.11.1 and is prone to multiple use-after-free vulnerabilities. The flaws are present in the application, which fails to properly handle crafted serialized input containing a (1) R or (2) r type specifier in (a) DateTimeZone data handled by the php_date_timezone_initialize_from_hash function or (b) DateTime data handled by the php_date_initialize_from_hash function. Successful exploitation could allow remote attackers to execute arbitrary code.