The remote host is missing an update to kdegraphics announced via advisory DSA 1357-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201357-1

It was discovered that an integer overflow in the xpdf PDF viewer may lead to the execution of arbitrary code if a malformed PDF file is opened. koffice includes a copy of the xpdf code and required an update as well. The oldstable distribution (sarge) will be fixed later. For the stable distribution (etch) this problem has been fixed in version 1.6.1-2etch1. For the unstable distribution (sid) this problem has been fixed in version 1.6.3-2. We recommend that you upgrade your koffice packages.