The remote host is missing an update to the system as announced in the referenced advisory.
The following packages are affected: mod_php4-twig php4 php4-cgi php4-cli php4-dtc php4-horde php4-nms mod_php4 php5 php5-cgi php5-cli mod_php5
CVE-2004-0594 The memory_limit functionality in PHP 4.x up to 4.3.7, and 5.x up to 5.0.0RC3, under certain conditions such as when register_globals is enabled, allows remote attackers to execute arbitrary code by triggering a memory_limit abort during execution of the zend_hash_init function and overwriting a HashTable destructor pointer before the initialization of key data structures is complete.
Solution: Update your system with the appropriate patches or software upgrades.