This vulnerability only affects configurations of sudo that have a runas user list that includes an exclusion of root. The most simple example is: ~~~ someuser ALL=(ALL, !root) /usr/bin/somecommand ~~~ The exclusion is specified using an excalamation mark (!). In this example, the "root" user is specified by name. The root user may also be identified in other ways, such as by user id: ~~~ someuser ALL=(ALL, !#0) /usr/bin/somecommand ~~~ or by reference to a runas alias: ~~~ Runas_Alias MYGROUP = root, adminuser someuser ALL=(ALL, !MYGROUP) /usr/bin/somecommand ~~~ To ensure your sudoers configuration is not affected by this vulnerability, we recommend examining each sudoers entry that includes the `!` character in the runas specification, to ensure that the root user is not among the exclusions. These can be found in the /etc/sudoers file or files under /etc/sudoers.d.