The remote host is missing an update to smarty announced via advisory DSA 1520-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201520-1

It was discovered that the regex module in Smarty, a PHP templating engine, allows attackers to call arbitrary PHP functions via templates using the regex_replace plugin by a specially crafted search string. For the stable distribution (etch), this problem has been fixed in version 2.6.14-1etch1. For the old stable distribution (sarge), this problem has been fixed in version 2.6.9-1sarge1. For the unstable distribution (sid), this problem has been fixed in version 2.6.18-1.1. We recommend that you upgrade your smarty package.