If the problem is in the base system, first read the FAQ section on <link xlink:href="@@URL_RELPREFIX@@/doc/en_US.ISO8859-1/books/faq/introduction.html#LATEST-VERSION">FreeBSD versions</link>, if you are not already familiar with the topic. It is not possible for FreeBSD to fix problems in anything other than certain recent branches of the base system, so filing a bug report about an older version will probably only result in a developer advising you to upgrade to a supported version to see if the problem still recurs. The Security Officer team maintains the <link xlink:href="@@URL_RELPREFIX@@/security/">list of supported versions</link>.