The remote host is missing an update as announced via advisory SSA:2004-136-01.

https://secure1.securityspace.com/smysecure/catid.html?in=SSA:2004-136-01

New mc packages are available for Slackware 9.0, 9.1, and -current to fix security issues that These could lead to a denial of service or the execution of arbitrary code as the user running mc. Sites that use mc should upgrade to the new mc package. 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-2004-0226 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0231 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0232