sshprotocol can use the option
--kerberosto authenticate via kerberos. For more info run
crackmapexec ssh --help.
sudo systemctl daemon-reload
sudo systemctl restart sshd
/usr/bin/false) and chrooting him in a jail is enough to avoid a shell access or abuse on the whole file system. But they are wrong, a user can ask to execute a command right after authentication before it’s default command or shell is executed. So to bypass the placeholder shell that will deny shell access, one only has to ask to execute a command (eg.
/bin/bash) before, just by doing:
/etc/ssh/sshd_config– openSSH) for the user
publickeyon openSSH configuration and setting it as the default method but not disabling
password. So by using the verbose mode of the SSH client an attacker can see that a weaker method is enabled:
PreferredAuthenticationsoption to force to use this method.