The remote host is missing an update as announced via advisory SSA:2007-324-01.

https://secure1.securityspace.com/smysecure/catid.html?in=SSA:2007-324-01

New mozilla-thunderbird packages are available for Slackware 10.2, 11.0, 12.0, and -current to fix security issues. Slackware is not vulnerable to either of these in its default configuration, but watch out if you've enabled JavaScript. More information about the security issues may be found here: http://www.mozilla.org/security/announce/2007/mfsa2007-36.html http://www.mozilla.org/security/announce/2007/mfsa2007-29.html http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-4841 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-5339