The snort.org website was re-designed in the past few months leaving BASE users with broken links to search for snort signature id's (SID). I discovered today that they had a working rules search at the snort.org site and figured out what the proper URL to do searches from BASE is.
Edit base_conf.php and replace the line that says:
'snort' => array('http://www.snort.org/pub-bin/sigs.cgi?sid=', ''),
'snort' => array('http://www.snort.org/search/results?q=sid:', ''),
or (Thanks Anonymous)
'snort' => array('http://www.snort.org/search/sid/', ''),
Their search is still broken, so on ocassion you will get a 500 error, but if you refresh a few times, the signature description will show up.