It would appear that a security issue affects the Ubuntu 17.04 (Zesty Zapus), Ubuntu 16.10 (Yakkety Yak), Ubuntu 16.04 LTS (Xenial Xerus), and Ubuntu 14.04 LTS (Trusty Tahr) releases, as well as all official derivatives, including Kubuntu, Xubuntu, Lubuntu, Ubuntu GNOME, etc. The vulnerability was discovered in the Sudo component, an open-source software that allows users to run programs with the security privileges of another user, such as root. Sudo incorrectly parsed the contents of /proc/[pid]/stat, which could be made by a local attacker to overwrite files as the system administrator.