User root can log in from ttyS0 despite securetty settings
Issue
- not able to disable root user login when connecting from ttyS0
In order to direct the console to the serial port, I'm using the following commands:
# grubby --args="pci=realloc pcie_aspm=off console=ttyS0" --update-kernel /boot/vmlinuz-3.10.0-229.el7.x86_64
Redirection is working well. However, although ttyS0
is not present in the /etc/securetty
file, the user root still can log in on the serial console.
Environment
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
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