The remote host is vulnerable to multiple attack vectors.
The remote host is running a version of PHP lower than 4.4.7 or 5.2.2. This version is vulnerable to a number of remote issues. At least one of these issues is related to a buffer overflow attack. An attacker exploiting these flaws would be able to impact confidentiality, integrity, and availability.
Upgrade to version 4.4.7, 5.2.2 or higher.