OpenSSH password guessing attacks may be 10,000 times easier than you thought

Credit:
An interesting problem with OpenSSH – let's call it a feature that turned out to be a vulnerability – has been publicised on the Full Disclosure mailing list.
To explain.
SSH stands for Secure Shell, one of the most widely-used and important remote access tools in the world. SSH runs on almost all Linux/Unix systems on the internet, so that sysadmins can look after them from afar. OpenSSH is by far the most widely-used implementation of SSH out there.