CVE-2019-19233

Updated sudo packages fix security vulnerabilities:

It was found that sudo always allowed commands to be run with unknown user or group ids if the sudo configuration allowed it for example via the "ALL" alias. This could allow sudo to impersonate non-existent account and depending on how applications are configured, could lead to certain restriction bypass. This is now explicitly disabled. A new setting called "allow unknown runas id" was introduced in order to enable this (CVE-2019-19232).

When an account is disabled via the shadow file, by replacing the password hash with "!", it is not considered disabled by sudo. And depending on the configuration, sudo can be run by using such disabled account (CVE-2019-19234).

The sudo package has been updated to version 1.8.31p1, fixing these issues and other bugs.