Summary
The remote host is missing an update as announced
via advisory SSA:2009-036-01.
Solution
https://secure1.securityspace.com/smysecure/catid.html?in=SSA:2009-036-01
Insight
New mozilla-firefox packages are available for Slackware 12.2 and -current to fix security issues.
More details about the issues may be found on the Mozilla website:
http://www.mozilla.org/security/known-vulnerabilities/firefox30.html