The remote host is missing an update to kdelibs announced via advisory DSA 518-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20518-1

iDEFENSE identified a vulnerability in the Opera web browser that could be used by remote attackers to create or truncate arbitrary files on the victims machine. The KDE team discovered that a similar vulnerability exists in KDE. A remote attacker could entice a user to open a carefully crafted telnet URI which may either create or truncate a file in the victims home directory. In KDE 3.2 and later versions the user is first explicitly asked to confirm the opening of the telnet URI. For the stable distribution (woody) this problem has been fixed in version 2.2.2-13.woody.10. We recommend that you upgrade your KDE libraries.