The remote host is missing an update to php5 announced via advisory DSA 1283-1.

The oldstable distribution (sarge) doesn't include php5. For the stable distribution (etch) these problems have been fixed in version 5.2.0-8+etch3. For the unstable distribution (sid) these problems have been fixed in version 5.2.0-11. We recommend that you upgrade your PHP packages. https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201283-1

For details on issues addressed in this update, please visit the referenced security advisories.