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CVE-2017-8900

Published: 11 May 2017

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.

Notes

AuthorNote
tyhicks
This issue was introduced when the user session handling moved from
upstart to systemd in Ubuntu 16.10.

Priority

Medium

CVSS 3 base score: 4.6

Status

Package Release Status
lightdm
Launchpad, Ubuntu, Debian
upstream Needs triage

precise Does not exist

trusty Does not exist
(trusty was not-affected)
xenial Not vulnerable

yakkety
Released (1.19.5-0ubuntu1.2)
zesty
Released (1.22.0-0ubuntu2.1)