The remote host is missing an update to sysstat announced via advisory DSA 460-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20460-1

Alan Cox discovered that the isag utility (which graphically displays data collected by the sysstat tools), creates a temporary file without taking proper precautions. This vulnerability could allow a local attacker to overwrite files with the privileges of the user invoking isag. For the current stable distribution (woody) this problem has been fixed in version 5.0.1-1. For the unstable distribution (sid) this problem will be fixed soon. We recommend that you update your sysstat package.