If you use sendmail : READ THIS
In the last 24hrs, I’ve gotten hints/info from two sources about some serious/significant vuln/bug/patch in sendmail is in the works. The latest says, in effect, the patch is done waiting for word on the coordinated announcement. I don’t have any technical details. I get rumors about stuff all the time, these two, in my experience are different and I’m inclined to think this is not rumor, but warning.