The remote host is missing an update to php4 announced via advisory DSA 1331-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201331-1

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-2006-0207 Stefan Esser discovered HTTP response splitting vulnerabilities in the session extension. This only affects Debian 3.1 (Sarge). CVE-2006-4486 Stefan Esser discovered that an integer overflow in memory allocation routines allows the bypass of memory limit restrictions. This only affects Debian 3.1 (Sarge) on 64 bit architectures. CVE-2007-1864 It was discovered that a buffer overflow in the xmlrpc extension allows the execution of arbitrary code. For the oldstable distribution (sarge) these problems have been fixed in version 4.3.10-22. For the stable distribution (etch) these problems have been fixed in version 4.4.4-8+etch4. The unstable distribution (sid) no longer contains php4. We recommend that you upgrade your PHP packages. Sarge packages for