.. / screen
Star

Shell

It can be used to break out from restricted environments by spawning an interactive system shell.

```
screen
```

File write

It writes data to files, it may be used to do privileged writes or write files outside a restricted file system.

This has been found working on screen version 4.06.02. The file has a trailing ^C character.
```
LFILE=file_to_write
screen -L -Logfile $LFILE tail -f /dev/null
DATA
^C
```
This has been found working on screen version 4.05.00. The file has a trailing ^C character.
```
LFILE=file_to_write
screen -L $LFILE tail -f /dev/null
DATA
^C
```

Sudo

It runs in privileged context and may be used to access the file system, escalate or maintain access with elevated privileges if enabled on sudo.

```
sudo screen
```