The remote host is missing an update to net-acct announced via advisory DSA 559-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20559-1

Stefan Nordhausen has identified a local security hole in net-acct, a user-mode IP accounting daemon. Old and redundant code from some time way back in the past created a temporary file in an insecure fashion. For the stable distribution (woody) this problem has been fixed in version 0.71-5woody1. For the unstable distribution (sid) this problem has been fixed in version 0.71-7. We recommend that you upgrade your net-acct package.