The remote host is missing an update as announced via advisory SSA:2008-191-02.

https://secure1.securityspace.com/smysecure/catid.html?in=SSA:2008-191-02

New bind packages are available for Slackware 8.1, 9.0, 9.1, 10.0, 10.1, 10.2, 11.0, 12.0, 12.1, and -current to address a security problem. More details may be found at the following links: http://www.isc.org/sw/bind/bind-security.php http://www.kb.cert.org/vuls/id/800113 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1447