CVE-2017-8900

4.6 mediumEPSS 0.4%

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.

Severity

CVSS 3.0

4.6 medium

CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS: 0.4% chance of exploitation in the next 30 days; higher than 36% of CVEs (scores of 2026-10-31)
Published: 2017-05-12
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

lightdm_project:lightdm

References

http://www.securityfocus.com/bid/98554
https://launchpad.net/bugs/1663157
https://people.canonical.com/~ubuntu-security/cve/2017/CVE-2017-8900.html
https://www.ubuntu.com/usn/usn-3285-1/
http://www.securityfocus.com/bid/98554

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