The remote host is missing an update to python-cherrypy announced via advisory DSA 1481-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201481-1

It was discovered that a directory traversal vulnerability in CherryPy, a pythonic, object-oriented web development framework may lead to denial of service by deleting files through malicious session IDs in cookies. For the stable distribution (etch), this problem has been fixed in version 2.2.1-3etch1. The old stable distribution (sarge) doesn't contain python-cherrypy. We recommend that you upgrade your python-cherrypy packages.