The remote host is missing an update to php5 announced via advisory DSA 2527-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%202527-1

Several vulnerabilities have been discovered in PHP, the web scripting language. The Common Vulnerabilities and Exposures project identifies the following issues: CVE-2012-2688 A buffer overflow in the scandir() function could lead to denial of service of the execution of arbitrary code. CVE-2012-3450 It was discovered that inconsistent parsing of PDO prepared statements could lead to denial of service. For the stable distribution (squeeze), this problem has been fixed in version 5.3.3-7+squeeze14. For the unstable distribution (sid), this problem has been fixed in version 5.4.4-4. We recommend that you upgrade your php5 packages.