The remote host is missing an update to apt-listchanges announced via advisory DSA 1465-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201465-1

Felipe Sateler discovered that apt-listchanges, a package change history notification tool, used unsafe paths when importing its python libraries. This could allow the execution of arbitary shell commands if the root user executed the command in a directory which other local users may write to. For the stable distribution (etch), this problem has been fixed in version 2.72.5etch1. For the old stable distribution (sarge), this problem was not present. For the unstable distribution (sid), this problem has been fixed in version 2.82. We recommend that you upgrade your apt-listchanges package.