The remote host is missing an update as announced via advisory SSA:2007-243-01.
Sun has released security advisories pertaining to both the Java Runtime Environment and the Standard Edition Development Kit. One such advisory may be found here: http://sunsolve.sun.com/search/document.do?assetkey=1-26-102995-1 Updated versions of both the jre and jdk packages are provided which address all known flaws in Java(TM) at this time. There may be more advisories on http://sunsolve.sun.com describing other flaws that are patched with this update. Happy hunting! Slackware repackages Sun's Java(TM) binaries without changing them, so the packages from Slackware 12.0 should work on all glibc based Slackware versions.