Comment 24 for bug 1663157

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Tyler Hicks (tyhicks) wrote :

If you have a use case which requires the guest session, you can manually re-enable it by writing the following contents to /etc/lightdm/lightdm.conf:

# Manually enable guest sessions despite them not being confined
# IMPORTANT: Makes the system vulnerable to CVE-2017-8900
# https://bugs.launchpad.net/bugs/1663157
[Seat:*]
allow-guest=true