Screaming Penguin - Source Does Matter

Several different revs of SSH (including OpenSSH) have serious vulnerabilities in the SSH1 protocol. There is a BINDview advisory about the specific revs and problems (linked -->.) This story made the rounds from LinuxToday, to Slashdot, to here, but its worth it, the more prevalently exploits and corrections are published the better.

Check the linked advisory for details, basically, like several previous advisories, DONT USE SSH1.   Bindview SSH Advisory