Updated php packages fix security vulnerabilities:
Buffer Over-read in unserialize when parsing Phar (CVE-2015-2783).
Buffer Overflow when parsing tar/zip/phar in pharsetinode (CVE-2015-3329).
Potential remote code execution with apache 2.4 apache2handler (CVE-2015-3330).
PHP has been updated to version 5.5.24, which fixes these issues and other bugs.