The remote host is missing an update to php3, php4 announced via advisory DSA 115-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20115-1

Stefan Esser, who is also a member of the PHP team, found several flaws in the way PHP handles multipart/form-data POST requests (as described in RFC1867) known as POST fileuploads. Each of the flaws could allow an attacker to execute arbitrary code on the victim's system. For PHP3 flaws contain a broken boundary check and an arbitrary heap overflow. For PHP4 they consist of a broken boundary check and a heap off by one error. For the stable release of Debian these problems are fixed in version 3.0.18-0potato1.1 of PHP3 and version 4.0.3pl1-0potato3 of PHP4. For the unstable and testing release of Debian these problems are fixed in version 3.0.18-22 of PHP3 and version 4.1.2-1 of PHP4. There is no PHP4 in the stable and unstable distribution for the arm architecture due to a compiler error. We recommend that you upgrade your php packages immediately.