The remote host is missing an update to flim announced via advisory DSA 500-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%20500-1

Tatsuya Kinoshita discovered a vulnerability in flim, an emacs library for working with internet messages, where temporary files were created without taking appropriate precautions. This vulnerability could potentially be exploited by a local user to overwrite files with the privileges of the user running emacs. the 'chroot' option. For the current stable distribution (woody) this problem has been fixed in version 1.14.3-9woody1. For the unstable distribution (sid), this problem will be fixed soon. We recommend that you update your flim package.