Googling on "openssh backdoor" gives entries dated 2008 on back. Do you have any pointers to the recent backdoor?
With the relatively regular leaks of major player commercial software code, the only way I know of to be completely "safe" is to install known-good software and stay disconnected from the internet.
I have a daughter. I tell her, "911 is what you dial after you're raped. 1911 is what you should have before they try."