Arch Linux: Access restriction bypass (CVE-2017-1000367)

On Linux systems, sudo parses the /proc/[pid]/stat file to determine the device number of the process's tty (field 7). The fields in the file are space-delimited, but it is possible for the command name (field 2) to include spaces, which sudo does not account for. A user with sudo privileges can cause sudo to use a device number of the user's choosing by creating a symbolic link from the sudo binary to a name that contains a space, followed by a number.
This may allow a user to be able to bypass the "tty_ticket" constraints. In order for this to succeed there must exist on the machine a terminal device that the user has previously authenticated themselves on via sudo within the last time stamp timeout (5 minutes by default).