The remote host is missing an update to php4 announced via advisory DSA 1282-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201282-1

Several remote vulnerabilities have been discovered in PHP, a server-side, HTML-embedded scripting language, which may lead to the execution of arbitrary code. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2007-1286 Stefan Esser discovered an overflow in the object reference handling code of the unserialize() function, which allows the execution of arbitrary code if malformed input is passed from an application. CVE-2007-1380 Stefan Esser discovered that the session handler performs insufficient validation of variable name length values, which allows information disclosure through a heap information leak. CVE-2007-1521 Stefan Esser discovered a double free vulnerability in the session_regenerate_id() function, which allows the execution of arbitrary code. CVE-2007-1711 Stefan Esser discovered a double free vulnerability in the session management code, which allows the execution of arbitrary code. CVE-2007-1718 Stefan Esser discovered that the mail() function performs insufficient validation of folded mail headers, which allows mail header injection. CVE-2007-1777 Stefan Esser discovered that the extension to handle ZIP archives performs insufficient length checks, which allows the execution of arbitrary code. For the oldstable distribution (sarge) these problems have been fixed in version 4.3.10-20. For the stable distribution (etch) these problems have been fixed in version 4.4.4-8+etch2. For the unstable distribution (sid) these problems have been fixed in version 4.4.6-1. php4 will be removed from sid thus you are strongly advised to migrate to php5 if you prefer to follow the unstable distribution. We recommend that you upgrade your PHP packages. Packages for the arm,