It's constructed entirely from builtin unix commands, so it's solid. The biggest risk is that someone could put malicious code into your ~/.sshrc, which would b

It's constructed entirely from builtin unix commands, so it's solid. The biggest risk is that someone could put malicious code into your ~/.sshrc, which would be run on the server. However, if they have write access to your $HOME directory, you're already in big trouble, as they could just as easily add something like `alias ssh='ssh "rm -rf $HOME"' to your ~/.bashrc.