CVE-2017-8900

Name	CVE-2017-8900
Description	LightDM through 1.22.0, when systemd is used in Ubuntu 16.10 and 17.x, allows physically proximate attackers to bypass intended AppArmor restrictions and visit the home directories of arbitrary users by establishing a guest session.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
NVD severity	low

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
lightdm (PTS)	stretch	1.18.3-1	fixed
	buster	1.26.0-4	fixed
	bullseye, sid	1.26.0-7	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
lightdm	source	(unstable)	(not affected)

- lightdm <not-affected> (No guest account support in Debian, cf. #661230)