CERT has issued a Vulnerability Note to say that Sun's Cobalt RaQ 4 Linux servers are so insecure that a hacker can take them over -- and this is the fun part -- IF users have installed Sun's Security Hardening Package. There is no fix at the moment. Or rather, the fix that dramatically improves the security of Sun's RaQ 4 Linux boxes is to uninstall Sun's Security Hardening Package.