The remote host is missing an update as announced via advisory SSA:2007-093-01.

https://secure1.securityspace.com/smysecure/catid.html?in=SSA:2007-093-01

New file packages are available for Slackware 8.1, 9.0, 9.1, 10.0, 10.1, 10.2, 11.0, and -current to fix a security issue. NOTE: In Slackware 11.0 and earlier, the file utility was part of the required 'bin' package, so this patch is needed even if your machine does not have a 'file' package installed (which, if you're not running Slackware -current, it probably does not). More details about this issue may be found in the Common Vulnerabilities and Exposures (CVE) database: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-1536